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Modelling the influence of plasticity induced softening on the low cycle fatigue and crack propagation behaviour of a nickel-based superalloy (2023)
Journal Article
Engel, B., Lavie, W., Rouse, J., Whittaker, M., Jones, J., Lancaster, R., …Hyde, C. (2024). Modelling the influence of plasticity induced softening on the low cycle fatigue and crack propagation behaviour of a nickel-based superalloy. Computational Materials Science, 231, Article 112604. https://doi.org/10.1016/j.commatsci.2023.112604

Cyclic hysteresis loops generated during high-temperature, isothermal, low-cycle fatigue testing of the nickel-based superalloy RR1000 revealed a gradual decrease in elastic modulus of up to 25 % compared to the initial value in dependence of the acc... Read More about Modelling the influence of plasticity induced softening on the low cycle fatigue and crack propagation behaviour of a nickel-based superalloy.

The Estimation of Taylor-Quinney Coefficients Using Small Ring Specimens (2022)
Journal Article
Lavie, W., Rouse, J. P., & Hyde, C. J. (2023). The Estimation of Taylor-Quinney Coefficients Using Small Ring Specimens. Experimental Mechanics, 63, 429-443. https://doi.org/10.1007/s11340-022-00920-z

Background: The use of the Taylor-Quinney coefficient for introducing a thermal dissipation term into material models relies on understanding its dependencies. These are usually determined through extensive experimentation, wherein temperature variat... Read More about The Estimation of Taylor-Quinney Coefficients Using Small Ring Specimens.

Failure modes in dual layer thickness Laser Powder Bed Fusion components using a novel post-mortem reconstruction technique (2022)
Journal Article
Gullane, A., Murray, J. W., Hyde, C. J., Sankare, S., Evirgen, A., & Clare, A. T. (2022). Failure modes in dual layer thickness Laser Powder Bed Fusion components using a novel post-mortem reconstruction technique. Additive Manufacturing, 59(Part B), Article 103186. https://doi.org/10.1016/j.addma.2022.103186

To exploit the design freedoms of Powder Bed Fusion, parameters can be varied within sub-volumes of components to achieve the optimal part for both service conditions and manufacturing productivity. This involves prioritising mechanical strength in a... Read More about Failure modes in dual layer thickness Laser Powder Bed Fusion components using a novel post-mortem reconstruction technique.

On the thermomechanical aging of LPBF alloy 718 (2022)
Journal Article
Sanchez, S., Gaspard, G., Hyde, C. J., Ashcroft, I. A., Ravi, G. A., & Clare, A. T. (2022). On the thermomechanical aging of LPBF alloy 718. Materials Science and Engineering: A, 841, Article 142998. https://doi.org/10.1016/j.msea.2022.142998

Heat treatment of products post additive manufacture are considered hugely important since the metallurgical condition post process is suboptimal. In the case of nickel-based superalloys, grain size, precipitate distribution and precipitate size are... Read More about On the thermomechanical aging of LPBF alloy 718.

Numerical Investigation into the Influence of Grain Orientation Distribution on the Local and Global Elastic-Plastic Behaviour of Polycrystalline Nickel-Based Superalloy INC-738 LC (2022)
Journal Article
Engel, B., Huth, M., & Hyde, C. (2022). Numerical Investigation into the Influence of Grain Orientation Distribution on the Local and Global Elastic-Plastic Behaviour of Polycrystalline Nickel-Based Superalloy INC-738 LC. Crystals, 12(1), Article 100. https://doi.org/10.3390/cryst12010100

Polycrystalline nickel-based superalloys tend to have large grains within component areas where high loads are dominant during operation. Due to these large grains, caused by the manufacturing and cooling process, the orientation of each grain become... Read More about Numerical Investigation into the Influence of Grain Orientation Distribution on the Local and Global Elastic-Plastic Behaviour of Polycrystalline Nickel-Based Superalloy INC-738 LC.

On the use of multiple layer thicknesses within laser powder bed fusion and the effect on mechanical properties (2021)
Journal Article
Gullane, A., Murray, J. W., Hyde, C. J., Sankare, S., Evirgen, A., & Clare, A. T. (2021). On the use of multiple layer thicknesses within laser powder bed fusion and the effect on mechanical properties. Materials and Design, 212, Article 110256. https://doi.org/10.1016/j.matdes.2021.110256

Laser Powder Bed fusion is capable of rapid production of parts, from conception, compared with traditional manufacturing methods. This said, the time taken to fabricate a single part can still be significant – typically many hours. Processing thicke... Read More about On the use of multiple layer thicknesses within laser powder bed fusion and the effect on mechanical properties.

A computationally efficient method for the prediction of fretting wear in practical engineering applications (2021)
Journal Article
Kong, Y., Bennett, C. J., & Hyde, C. J. (2022). A computationally efficient method for the prediction of fretting wear in practical engineering applications. Tribology International, 165, Article 107317. https://doi.org/10.1016/j.triboint.2021.107317

A method for simulating fretting wear using the Modified Simplex Method for a contact solution has been developed. The initial separation between two contacting bodies was used as an input to solve the contact force distribution. An average cycle pre... Read More about A computationally efficient method for the prediction of fretting wear in practical engineering applications.

Thermomechanical fatigue life due to scatter in constitutive parameters (2021)
Journal Article
Leidermark, D., Rouse, J., Engel, B., Hyde, C., Pattison, S., & Stekovic, S. (2021). Thermomechanical fatigue life due to scatter in constitutive parameters. Computational Materials Science, 198, Article 110690. https://doi.org/10.1016/j.commatsci.2021.110690

For critical component application, such as aerospace turbine rotors, it is imperative to be able to make accurate in-service material behaviour and component life predictions for both design and monitoring of component life. The development of such... Read More about Thermomechanical fatigue life due to scatter in constitutive parameters.

Small specimen techniques for estimation of tensile, fatigue, fracture and crack propagation material model parameters (2021)
Journal Article
Kazakeviciute, J., Rouse, J. P., Focatiis, D., & Hyde, C. (2022). Small specimen techniques for estimation of tensile, fatigue, fracture and crack propagation material model parameters. Journal of Strain Analysis for Engineering Design, 57(4), 227-254. https://doi.org/10.1177/03093247211025208

Small specimen mechanical testing is an exciting and rapidly developing field in which fundamental deformation behaviours can be observed from experiments performed on comparatively small amounts of material. These methods are particularly useful whe... Read More about Small specimen techniques for estimation of tensile, fatigue, fracture and crack propagation material model parameters.

Machine learning to determine the main factors affecting creep rates in laser powder bed fusion (2021)
Journal Article
Sanchez, S., Rengasamy, D., Hyde, C. J., Figueredo, G. P., & Rothwell, B. (2021). Machine learning to determine the main factors affecting creep rates in laser powder bed fusion. Journal of Intelligent Manufacturing, 32(8), 2353–2373. https://doi.org/10.1007/s10845-021-01785-0

There is an increasing need for the use of additive manufacturing (AM) to produce improved critical application engineering components. However, the materials manufactured using AM perform well below their traditionally manufactured counterparts, par... Read More about Machine learning to determine the main factors affecting creep rates in laser powder bed fusion.

Powder Bed Fusion of nickel-based superalloys: A review (2021)
Journal Article
Sanchez, S., Xu, Z., Smith, P., Gaspard, G., Hyde, C. J., Ashcroft, I. A., …Clare, A. T. (2021). Powder Bed Fusion of nickel-based superalloys: A review. International Journal of Machine Tools and Manufacture, 165, Article 103729. https://doi.org/10.1016/j.ijmachtools.2021.103729

Powder Bed Fusion (PBF) techniques constitute a family of Additive Manufacturing (AM) processes, which are characterised by high design flexibility and no tooling requirement. This makes PBF techniques attractive to many modern manufacturing sectors... Read More about Powder Bed Fusion of nickel-based superalloys: A review.

Interlaced layer thicknesses within single laser powder bed fusion geometries (2021)
Journal Article
Clare, A., Gullane, A., Hyde, C., Murray, J. W., Sankare, S., & Wits, W. W. (2021). Interlaced layer thicknesses within single laser powder bed fusion geometries. CIRP Annals - Manufacturing Technology, https://doi.org/10.1016/j.cirp.2021.03.001

The geometrical design freedoms associated with additive manufacturing techniques are currently well exploited and finding commercial application. The capability of layer-based processes to allow modification of composition and microstructure in proc... Read More about Interlaced layer thicknesses within single laser powder bed fusion geometries.

Multi-laser scan strategies for enhancing creep performance in LPBF (2021)
Journal Article
Sanchez, S., Hyde, C. J., Clare, A. T., & Ashcroft, I. A. (2021). Multi-laser scan strategies for enhancing creep performance in LPBF. Additive Manufacturing, 41, Article 101948. https://doi.org/10.1016/j.addma.2021.101948

Laser Powder Bed Fusion (LPBF) enables complex structures to be manufactured, which is attractive to industries where augmented service performance can be achieved. However, the build time of LPBF can be slower than traditional manufacturing processe... Read More about Multi-laser scan strategies for enhancing creep performance in LPBF.

The creep behaviour of nickel alloy 718 manufactured by laser powder bed fusion (2021)
Journal Article
Sanchez, S., Gaspard, G., Hyde, C., Ashcroft, I., Ravi, G., & Clare, A. (2021). The creep behaviour of nickel alloy 718 manufactured by laser powder bed fusion. Materials and Design, 204, Article 109647. https://doi.org/10.1016/j.matdes.2021.109647

Components manufactured by laser powder bed fusion (LPBF) are limited by their performance for use in critical applications. LPBF materials have microstructural defects, such as suboptimal grain size and morphology, and macroscale anomalies, such as... Read More about The creep behaviour of nickel alloy 718 manufactured by laser powder bed fusion.

On the use of small ring testing for the characterisation of elastic and yield material property variation in additively manufactured materials (2020)
Journal Article
Rouse, J. P., Simonelli, M., & Hyde, C. J. (2020). On the use of small ring testing for the characterisation of elastic and yield material property variation in additively manufactured materials. Additive Manufacturing, 36, https://doi.org/10.1016/j.addma.2020.101589

© 2020 Elsevier B.V. The present work introduces a small volume, high throughput testing method that may be used to quickly, and with high spatial fidelity, investigate local material properties in additively manufactured materials. A case study appl... Read More about On the use of small ring testing for the characterisation of elastic and yield material property variation in additively manufactured materials.

A review of non-destructive testing techniques for the in-situ investigation of fretting fatigue cracks (2020)
Journal Article
Kong, Y., Bennett, C. J., & Hyde, C. J. (2020). A review of non-destructive testing techniques for the in-situ investigation of fretting fatigue cracks. Materials and Design, 196, Article 109093. https://doi.org/10.1016/j.matdes.2020.109093

© 2020 The Authors Fretting fatigue can significantly reduce the life of components, leading to unexpected in-service failures. This phenomenon has been studied for over a century, with significant progress being made during the past decade. There ar... Read More about A review of non-destructive testing techniques for the in-situ investigation of fretting fatigue cracks.

DevTMF – Towards code of practice for thermo-mechanical fatigue crack growth (2020)
Journal Article
Stekovic, S., Jones, J. P., Engel, B., Whittaker, M. T., Norman, V., Rouse, J. P., …Moverare, J. (2020). DevTMF – Towards code of practice for thermo-mechanical fatigue crack growth. International Journal of Fatigue, 138, Article 105675. https://doi.org/10.1016/j.ijfatigue.2020.105675

© 2020 Elsevier Ltd The current paper presents work on identification and evaluation of a range of factors influencing accuracy and comparability of data generated by three laboratories carrying out stress-controlled thermo-mechanical fatigue crack g... Read More about DevTMF – Towards code of practice for thermo-mechanical fatigue crack growth.

The prediction of crack propagation in coarse grain RR1000 using a unified modelling approach (2020)
Journal Article
Engel, B., Rouse, J., Hyde, C., Lavie, W., Leidermark, D., Stekovic, S., …Li, H. (2020). The prediction of crack propagation in coarse grain RR1000 using a unified modelling approach. International Journal of Fatigue, 137, 105652. https://doi.org/10.1016/j.ijfatigue.2020.105652

© 2020 Elsevier Ltd The polycrystalline nickel-base superalloy RR1000 is used as turbine rotor material in Rolls-Royce aero engines and has to withstand a wide variety of load and temperature changes during operation. In order to maximize the potenti... Read More about The prediction of crack propagation in coarse grain RR1000 using a unified modelling approach.

Potential difference methods for measuring crack growth: A review (2020)
Journal Article
Si, Y., Rouse, J. P., & Hyde, C. J. (2020). Potential difference methods for measuring crack growth: A review. International Journal of Fatigue, 136, https://doi.org/10.1016/j.ijfatigue.2020.105624

© 2020 Elsevier Ltd Non-destructive testing techniques are widely applied in industry for the evaluation of quantities of interest without inflicting additional damage accumulation. Crack detection and monitoring is a prime example of where non-destr... Read More about Potential difference methods for measuring crack growth: A review.

A viscoelastic – viscoplastic material model for superalloy applications (2020)
Journal Article
Rouse, J. P., Engel, B., Hyde, C. J., Pattison, S. J., Whittaker, M. T., Jones, J. P., …Barnard, N. C. (2020). A viscoelastic – viscoplastic material model for superalloy applications. International Journal of Fatigue, 136, Article 105579. https://doi.org/10.1016/j.ijfatigue.2020.105579

© 2020 Elsevier Ltd An understanding of rate dependency over a wide range of time scales is vitally important in approximating the transient response of critical components operating in extreme environments. Many examples of viscoplastic model formul... Read More about A viscoelastic – viscoplastic material model for superalloy applications.

The effect of phase angle on crack growth mechanisms under thermo-mechanical fatigue loading (2020)
Journal Article
Jones, J., Whittaker, M., Lancaster, R., Hyde, C., Rouse, J., Engel, B., …Li, H. Y. (2020). The effect of phase angle on crack growth mechanisms under thermo-mechanical fatigue loading. International Journal of Fatigue, 135, Article 105539. https://doi.org/10.1016/j.ijfatigue.2020.105539

© 2020 Elsevier Ltd The current paper describes TMF crack growth behaviour in an advanced nickel-based superalloy. Changes in behaviour are examined which occur as a function of the phase angle between applied stress and temperature. The fractography... Read More about The effect of phase angle on crack growth mechanisms under thermo-mechanical fatigue loading.

Thermomechanical fatigue in 9-12Cr steels: Life prediction models and the effect of tensile dwell periods (2019)
Journal Article
Barrett, R. A., Hyde, C. J., O'Donoghue, P. E., & Leen, S. B. (2019). Thermomechanical fatigue in 9-12Cr steels: Life prediction models and the effect of tensile dwell periods. International Journal of Fatigue, 126, 335-345. https://doi.org/10.1016/j.ijfatigue.2019.05.007

This paper is concerned with the assessment of life prediction models for thermomechanical fatigue (TMF), with specific application to P91 steel. A program of TMF tests, including dwell periods, are performed to determine the role of thermomechanical... Read More about Thermomechanical fatigue in 9-12Cr steels: Life prediction models and the effect of tensile dwell periods.

The development of a novel technique for small ring specimen tensile testing (2018)
Journal Article
Kazakeviciute, J., Rouse, J., De Focatiis, D., & Hyde, C. (2019). The development of a novel technique for small ring specimen tensile testing. Theoretical and Applied Fracture Mechanics, 99, 131-139. https://doi.org/10.1016/j.tafmec.2018.11.016

The wide scale use of small specimens in routine testing programs could significantly reduce material resource requirements (factors of 10 are easily achievable). This is a major benefit to situations where there is not enough material to manufacture... Read More about The development of a novel technique for small ring specimen tensile testing.

A neural network approach for determining spatial and geometry dependent Green's functions for thermal stress approximation in power plant header components (2018)
Journal Article
Rouse, J., Hyde, C., & Morris, A. (2018). A neural network approach for determining spatial and geometry dependent Green's functions for thermal stress approximation in power plant header components. International Journal of Pressure Vessels and Piping, 168, 269-288. https://doi.org/10.1016/j.ijpvp.2018.10.020

The trend in power generation to operate plant with a greater frequency of on/partial/off load conditions creates several concerns for the long term structural integrity of many high temperature components. The Green's function method has been used f... Read More about A neural network approach for determining spatial and geometry dependent Green's functions for thermal stress approximation in power plant header components.

Effect of post processing on the creep performance of laser powder bed fused Inconel 718 (2018)
Journal Article
Xu, Z., Murray, J., Hyde, C., & Clare, A. (2018). Effect of post processing on the creep performance of laser powder bed fused Inconel 718. Additive Manufacturing, 24, 486-497. https://doi.org/10.1016/j.addma.2018.10.027

In this study, the creep performance of laser powder bed fusion manufactured Inconel 718 specimens is studied in detail and compared with conventional hot-rolled specimens alongside as-built then heat-treated and as-built then hot-isostatic pressed s... Read More about Effect of post processing on the creep performance of laser powder bed fused Inconel 718.

The Prediction of isothermal cyclic plasticity in 7175-T7351 aluminium alloy with particular emphasis on thermal ageing effects (2018)
Journal Article
Wing Cheong, M. L., Rouse, J., Hyde, C., & Kennedy, A. (2018). The Prediction of isothermal cyclic plasticity in 7175-T7351 aluminium alloy with particular emphasis on thermal ageing effects. International Journal of Fatigue, 114, 92-108. https://doi.org/10.1016/j.ijfatigue.2018.05.010

Rapid thermal ageing has been observed in the literature for certain aerospace aluminium alloys under conditions which are foreseeable in their intended component applications. While several experimental programs have explored this phenomenon in the... Read More about The Prediction of isothermal cyclic plasticity in 7175-T7351 aluminium alloy with particular emphasis on thermal ageing effects.

A case study investigation into the effects of spatially dependent convection coefficients on the fatigue response of a power plant header component (2018)
Journal Article
Rouse, J., Zacharzewski, P., Hyde, C., Jefferson-Loveday, R. J., Morris, A., & Kyaw, S. (2018). A case study investigation into the effects of spatially dependent convection coefficients on the fatigue response of a power plant header component. International Journal of Fatigue, 113, 137-148. https://doi.org/10.1016/j.ijfatigue.2018.03.032

Societal and environmental pressures are forcing thermal power plant operators to deviate greatly from the generation strategies of the past. The application of high frequency start up/shut down/partial load cycles to components that may well be outs... Read More about A case study investigation into the effects of spatially dependent convection coefficients on the fatigue response of a power plant header component.

The influence of shot peening on the fatigue response of Ti-6Al-4V surfaces subject to different machining processes (2018)
Journal Article
Xu, Z., Dunleavey, J., Antar, M., Hood, R., Soo, S., Kucukturk, G., …Clare, A. (2018). The influence of shot peening on the fatigue response of Ti-6Al-4V surfaces subject to different machining processes. International Journal of Fatigue, 111, https://doi.org/10.1016/j.ijfatigue.2018.02.022

Machining processes are known to drastically impact the performance and lifetime of a component subjected to fatigue in service. Therefore, understanding the effect of manufacturing processes on surface integrity is vital to determine their suitabili... Read More about The influence of shot peening on the fatigue response of Ti-6Al-4V surfaces subject to different machining processes.

Creep behaviour of inconel 718 processed by laser powder bed fusion (2018)
Journal Article
Xu, Z., Hyde, C., Tuck, C., & Clare, A. (2018). Creep behaviour of inconel 718 processed by laser powder bed fusion. Journal of Materials Processing Technology, 256, https://doi.org/10.1016/j.jmatprotec.2018.01.040

Additive manufacturing lends itself well to the manufacture of aerospace parts due to the high complexity and small volume of many components found in modern aero engines. By exploiting additive manufacturing design freedoms, enhanced part functional... Read More about Creep behaviour of inconel 718 processed by laser powder bed fusion.

Defect evolution in laser powder bed fusion additive manufactured components during thermo-mechanical testing (2017)
Conference Proceeding
Xu, Z., Hyde, C. J., Thompson, A., Leach, R. K., Maskery, I., Tuck, C., & Clare, A. T. (2017). Defect evolution in laser powder bed fusion additive manufactured components during thermo-mechanical testing.

The mechanical performance of additively manufactured (AM) components remains an issue, limiting the implementation of AM technologies. In this work, a new method is presented, to examine the evolution of defects in an Inconel 718 two-bar test specim... Read More about Defect evolution in laser powder bed fusion additive manufactured components during thermo-mechanical testing.

Staged thermomechanical testing of nickel superalloys produced by selective laser melting (2017)
Journal Article
Xu, Z., Hyde, C. J., Thompson, A., Leach, R. K., Maskery, I., Tuck, C., & Clare, A. T. (2017). Staged thermomechanical testing of nickel superalloys produced by selective laser melting. Materials and Design, 133, 520-527. https://doi.org/10.1016/j.matdes.2017.08.009

The creep performance of additively manufactured components remains an issue before additive manufacturing can be put fully implemented. In this study, Inconel 718 two-bar specimens are produced by selective laser melting and subjected to a ‘staged’... Read More about Staged thermomechanical testing of nickel superalloys produced by selective laser melting.

Small ring testing of high temperature materials (2017)
Journal Article
Hyde, C. J., Hyde, T. H., & Sun, W. (in press). Small ring testing of high temperature materials. Key Engineering Materials, 734, https://doi.org/10.4028/www.scientific.net/KEM.734.168

In service components such as steam pipes, pipe branches, gas and steam turbine blades, etc. which operate in engineering applications such as power plant, aero-engines, chemical plant etc., can operate at temperatures which are high enough for creep... Read More about Small ring testing of high temperature materials.

Practical considerations of the use of cross-weld and compact tension specimens’ creep data (2016)
Journal Article
Petkov, M. P., Hyde, C. J., & Hyde, T. H. (2016). Practical considerations of the use of cross-weld and compact tension specimens’ creep data. Journal of Strain Analysis for Engineering Design, 51(3), 179-206. https://doi.org/10.1177/0309324715627575

This article gives an overview of the use of cross-weld and compact tension specimen modelling and analyses data to characterise creep behaviour of the high-temperature components. Cross-weld and compact tension specimens are used to describe creep c... Read More about Practical considerations of the use of cross-weld and compact tension specimens’ creep data.

Micromechanical finite element modelling of thermo-mechanical fatigue for P91 steels (2016)
Journal Article
Li, D., Barrett, R. A., O’Donoghue, P. E., Hyde, C. J., O’Dowd, N. P., & Leen, S. B. (2016). Micromechanical finite element modelling of thermo-mechanical fatigue for P91 steels. International Journal of Fatigue, 87, https://doi.org/10.1016/j.ijfatigue.2015.11.025

In this paper, the cyclic plasticity and fatigue crack initiation behaviour of a tempered martensite ferritic steel under thermo-mechanical fatigue conditions is examined by means of micromechanical finite element modelling. The crystal plasticity-ba... Read More about Micromechanical finite element modelling of thermo-mechanical fatigue for P91 steels.

A comparison of simple methods to incorporate material temperature dependency in the Green’s function method for estimating transient thermal stresses in thick-walled power plant components (2016)
Journal Article
Rouse, J., & Hyde, C. J. (in press). A comparison of simple methods to incorporate material temperature dependency in the Green’s function method for estimating transient thermal stresses in thick-walled power plant components. Materials, 9(1), https://doi.org/10.3390/ma9010026

The threat of thermal fatigue is an increasing concern for thermal power plant operators due to the increasing tendency to adopt “two-shifting” operating procedures. Thermal plants are likely to remain part of the energy portfolio for the foreseeable... Read More about A comparison of simple methods to incorporate material temperature dependency in the Green’s function method for estimating transient thermal stresses in thick-walled power plant components.

Cyclic thermomechanical testing of 316 stainless steel (2015)
Journal Article
Buss, T., & Hyde, C. J. (in press). Cyclic thermomechanical testing of 316 stainless steel. Materials at High Temperatures, 32(3), https://doi.org/10.1179/0960340914Z.00000000068

Materials used for components such as power plant steam pipes, gas turbines discs and die forming machinery can be subject to combinations of extreme loading and temperature conditions. In addition, the materials can contain or develop cracks. Once a... Read More about Cyclic thermomechanical testing of 316 stainless steel.

Cyclic viscoplasticity testing and modeling of a service-aged P91 steel (2014)
Journal Article
Hyde, C. J., Sun, W., Hyde, T., Rouse, J., Farragher, T., O'Dowd, N. P., & Leen, S. (2014). Cyclic viscoplasticity testing and modeling of a service-aged P91 steel. Journal of Pressure Vessel Technology, 136(4), Article 044501. https://doi.org/10.1115/1.4026865

A service-aged P91 steel was used to perform an experimental program of cyclic mechanical testing in the temperature range of 400 °C–600 °C, under isothermal conditions, using both saw-tooth and dwell (inclusion of a constant strain dwell period at t... Read More about Cyclic viscoplasticity testing and modeling of a service-aged P91 steel.

High temperature, low cycle fatigue characterization of P91 weld and heat affected zone material (2014)
Journal Article
Farragher, T., Scully, S., O'Dowd, N., Hyde, C. J., & Leen, S. (2014). High temperature, low cycle fatigue characterization of P91 weld and heat affected zone material. Journal of Pressure Vessel Technology, 136(2), Article 021403. https://doi.org/10.1115/1.4025943

The high temperature low cycle fatigue behavior of P91 weld metal (WM) and weld joints (cross-weld) is presented. Strain-controlled tests have been carried out at 400 °C and 500 °C. The cyclic behavior of the weld material (WM) and cross-weld (CW) sp... Read More about High temperature, low cycle fatigue characterization of P91 weld and heat affected zone material.

A Basis for Selecting the Most Appropriate Small Specimen Creep Test Type (2014)
Journal Article
Hyde, T. H., Hyde, C. J., & Sun, W. (2014). A Basis for Selecting the Most Appropriate Small Specimen Creep Test Type. Journal of Pressure Vessel Technology, 136(2), Article 024502. https://doi.org/10.1115/1.4025864

Many components in conventional and nuclear power plant, aero-engines, chemical plant etc., operate at temperatures which are high enough for creep to occur. These include plain pipes, pipe bends, branched pipes etc., the manufacture of such componen... Read More about A Basis for Selecting the Most Appropriate Small Specimen Creep Test Type.

A unified viscoplastic model for high temperature low cycle fatigue of service-aged P91 steel (2014)
Journal Article
Barrett, R., Farragher, T., Hyde, C. J., O'Dowd, N., O'Donoghue, P., & Leen, S. (2014). A unified viscoplastic model for high temperature low cycle fatigue of service-aged P91 steel. Journal of Pressure Vessel Technology, 136(2), Article 021402. https://doi.org/10.1115/1.4025618

The finite element (FE) implementation of a hyperbolic sine unified cyclic viscoplasticity model is presented. The hyperbolic sine flow rule facilitates the identification of strain-rate independent material parameters for high temperature applicatio... Read More about A unified viscoplastic model for high temperature low cycle fatigue of service-aged P91 steel.

Pragmatic optimisation methods for determining material constants of viscoplasticity model from isothermal experimental data (2013)
Journal Article
Rouse, J. P., Hyde, C. J., Sun, W., & Hyde, T. (in press). Pragmatic optimisation methods for determining material constants of viscoplasticity model from isothermal experimental data. Materials Science and Technology, 30(1), https://doi.org/10.1179/1743284713Y.0000000277

A procedure to estimate material constants for the unified Chaboche viscoplasticity model from experimental data has been published elsewhere; however several critical assumptions are made to enable this and potential numerical problems can limit the... Read More about Pragmatic optimisation methods for determining material constants of viscoplasticity model from isothermal experimental data.

Applied Creep Mechanics (2013)
Book
Hyde, T. H., Sun, W., & Hyde, C. J. (2013). Applied Creep Mechanics. McGraw-Hill

Small ring testing of a creep resistant material (2013)
Journal Article
Hyde, C. J., Hyde, T., Sun, W., Nardone, S., & De Bruycker, E. (2013). Small ring testing of a creep resistant material. Materials Science and Engineering: A, 586, https://doi.org/10.1016/j.msea.2013.07.081

Many components in conventional and nuclear power plant, aero-engines, chemical plant etc., operate at temperatures which are high enough for creep to occur. These include steam pipes, pipe branches, gas and steam turbine blades, etc. The manufacture... Read More about Small ring testing of a creep resistant material.

Characterization of viscoplasticity behaviour of P91 and P92 power plant steels (2013)
Journal Article
Saad, A. A., Hyde, T., Sun, W., Hyde, C. J., & Tanner, D. W. J. (2013). Characterization of viscoplasticity behaviour of P91 and P92 power plant steels. International Journal of Pressure Vessels and Piping, 111-112, https://doi.org/10.1016/j.ijpvp.2013.08.001

This paper deals with the determination of material constitutive model for P91 and P92 steels at high temperatures. An isothermal, strain-controlled test programme was conducted for both steels for a temperature range between 400 and 675 °C. The expe... Read More about Characterization of viscoplasticity behaviour of P91 and P92 power plant steels.

Comparison of several optimisation strategies for the determination of material constants in the Chaboche visco-plasticity model (2013)
Journal Article
Rouse, J. P., Hyde, C. J., Sun, W., & Hyde, T. (2013). Comparison of several optimisation strategies for the determination of material constants in the Chaboche visco-plasticity model. Journal of Strain Analysis for Engineering Design, 48(6), https://doi.org/10.1177/0309324713490925

Determining representative material constant sets for models that can accurately predict the complex plasticity and creep behaviour of components undergoing cyclic loading is of great interest to many industries. The Chaboche unified visco-plasticity... Read More about Comparison of several optimisation strategies for the determination of material constants in the Chaboche visco-plasticity model.

Effective determination of cyclic-visco-plasticity material properties using an optimisation procedure and experimental data exhibiting scatter (2013)
Journal Article
Rouse, J. P., Hyde, C. J., Sun, W., & Hyde, T. H. (2013). Effective determination of cyclic-visco-plasticity material properties using an optimisation procedure and experimental data exhibiting scatter. Materials at High Temperatures, 30(2), 117-128. https://doi.org/10.3184/096034013x13720928952114

It may be inevitable in the design and analysis of most high temperature components (such as power industry pipe work) that variations in load and/or temperature will occur in normal operation. This presents complications in the prediction of the res... Read More about Effective determination of cyclic-visco-plasticity material properties using an optimisation procedure and experimental data exhibiting scatter.

An Overview of Small Specimen Creep Testing (2013)
Book Chapter
Hyde, T. H., Sun, W., & Hyde, C. J. (2013). An Overview of Small Specimen Creep Testing. In Advanced Materials Modelling for Structures (201-216). Springer. https://doi.org/10.1007/978-3-642-35167-9_19

© 2013, Springer-Verlag Berlin Heidelberg. In this paper, some commonly used small specimen creep testing methods, including sub-sized uniaxial creep testing, impression creep testing, small punch creep testing, small ring creep testing and small two... Read More about An Overview of Small Specimen Creep Testing.

Theoretical basis and practical aspects of small specimen creep testing (2012)
Journal Article
Hyde, T. H., Hyde, C. J., & Sun, W. (2013). Theoretical basis and practical aspects of small specimen creep testing. Journal of Strain Analysis for Engineering Design, 48(2), 112-125. https://doi.org/10.1177/0309324712463299

Interest in and the application of small specimen creep test techniques are increasing. This is because it is only possible to obtain small samples of material in some situations, for example, the scoop samples that are removed from in-service compon... Read More about Theoretical basis and practical aspects of small specimen creep testing.

Thermo-mechanical fatigue testing and simulation using a viscoplasticity model for a P91 steel (2012)
Journal Article
Hyde, C. J., Sun, W., Hyde, T., & Saad, A. (2012). Thermo-mechanical fatigue testing and simulation using a viscoplasticity model for a P91 steel. Computational Materials Science, 56, https://doi.org/10.1016/j.commatsci.2012.01.006

An experimental programme of cyclic thermo-mechanical testing for a P91 power plant steel, under isothermal, and in-phase and out-of-phase thermo-mechanical, temperature-strain cycle conditions, has been implemented. Using the experimental data, an o... Read More about Thermo-mechanical fatigue testing and simulation using a viscoplasticity model for a P91 steel.

An investigation of the failure mechanisms in high temperature materials subjected to isothermal and anisothermal fatigue and creep conditions (2011)
Journal Article
Hyde, C. J., Sun, W., & Hyde, T. (in press). An investigation of the failure mechanisms in high temperature materials subjected to isothermal and anisothermal fatigue and creep conditions. Procedia Engineering, 10, https://doi.org/10.1016/j.proeng.2011.04.192

Many engineering components are subjected to conditions which have a detrimental effect on the materials from which they are made. Such components are used, for example, within high temperature regions of aeroengines (e.g. turbine discs) and power pl... Read More about An investigation of the failure mechanisms in high temperature materials subjected to isothermal and anisothermal fatigue and creep conditions.

Thermal-mechanical fatigue simulation of a P91 steel in a temperature range of 400–600°C (2011)
Journal Article
Saad, A., Hyde, C. J., Sun, W., & Hyde, T. (2011). Thermal-mechanical fatigue simulation of a P91 steel in a temperature range of 400–600°C. Materials at High Temperatures, 28(3), https://doi.org/10.3184/096034011X13072954674044

This paper deals with the identification of material constants to simulate the effect of cyclic mechanical loading and temperatures. A Chaboche viscoplasticity model was used in this study to model the thermal-mechanical behaviour of a P91 martensiti... Read More about Thermal-mechanical fatigue simulation of a P91 steel in a temperature range of 400–600°C.

Damage mechanics based predictions of creep crack growth in 316 stainless steel (2010)
Journal Article
Hyde, C. J., Hyde, T., Sun, W., & Becker, A. (2010). Damage mechanics based predictions of creep crack growth in 316 stainless steel. Engineering Fracture Mechanics, 77(12), https://doi.org/10.1016/j.engfracmech.2010.06.011

This paper describes a novel modelling process for creep crack growth prediction of a 316 stainless steel using continuum damage mechanics, in conjunction with finite element (FE) analysis. A damage material behaviour model, proposed by Liu and Murak... Read More about Damage mechanics based predictions of creep crack growth in 316 stainless steel.

Cyclic thermo-mechanical material modelling and testing of 316 stainless steel (2010)
Journal Article
Hyde, C. J., Sun, W., & Leen, S. B. (2010). Cyclic thermo-mechanical material modelling and testing of 316 stainless steel. International Journal of Pressure Vessels and Piping, 87(6), https://doi.org/10.1016/j.ijpvp.2010.03.007

A programme of cyclic mechanical testing of a 316 stainless steel, at temperatures of up to 600 °C under isothermal conditions, for the identification of material constitutive constants, has been carried out using a thermo-mechanical fatigue test mac... Read More about Cyclic thermo-mechanical material modelling and testing of 316 stainless steel.

On the interpretation of results from small punch creep tests (2010)
Journal Article
Hyde, T. H., Stoyanov, M., Sun, W., & Hyde, C. J. (2010). On the interpretation of results from small punch creep tests. Journal of Strain Analysis for Engineering Design, 45(3), https://doi.org/10.1243/03093247JSA592

The small punch creep testing method is highly complex and involves interactions between a number of non-linear processes. The deformed shapes that are produced from such tests are related to the punch and specimen dimensions and to the elastic, plas... Read More about On the interpretation of results from small punch creep tests.

A novel method for obtaining the multiaxiality constant for damage mechanics which is appropriate to crack tip conditions (2010)
Journal Article
Hyde, C. J., Sun, W., & Hyde, T. (2010). A novel method for obtaining the multiaxiality constant for damage mechanics which is appropriate to crack tip conditions. Journal of Energy and Power Engineering, https://doi.org/10.1115/PVP2011-57166

Many engineering components, such as power plant steam pipes, aero-engine turbine discs, etc, operate under severe loading/temperature conditions for the majority of their service life. As a result, cracks can initiate and subsequently propagate over... Read More about A novel method for obtaining the multiaxiality constant for damage mechanics which is appropriate to crack tip conditions.

Determination of material parameters in the chaboche unified viscoplasticty model (2009)
Journal Article
Gong, Y., Hyde, C. J., Sun, W., & Hyde, T. Determination of material parameters in the chaboche unified viscoplasticty model. Applied Mechanics and Materials, 16-19, https://doi.org/10.4028/www.scientific.net/AMM.16-19.955

An experimental programme of cyclic mechanical testing of a 316 stainless steel, at temperatures up to 600°C, under isothermal conditions, for the identification of material constitutive constants, has been carried out using a thermo-mechanical fatig... Read More about Determination of material parameters in the chaboche unified viscoplasticty model.

Determination of material properties in the Chaboche unified viscoplasticity model (2009)
Journal Article
Gong, Y., Hyde, C. J., Sun, W., & Hyde, T. (2010). Determination of material properties in the Chaboche unified viscoplasticity model. Proceedings of the Institution of Mechanical Engineers, Part L: Journal of Materials: Design and Applications, 224(1), https://doi.org/10.1243/14644207JMDA273

An experimental programme of cyclic mechanical testing of a 316 stainless steel, at temperatures up to 600°C, under isothermal conditions, for the identification of material constitutive constants, has been carried out using a thermo-mechanical fatig... Read More about Determination of material properties in the Chaboche unified viscoplasticity model.