Outputs (60)

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.

Unveiling surfaces for advanced materials characterisation with large-area electrochemical jet machining (2021)
Journal Article
Speidel, A., Xu, D., Bisterov, I., Mitchell-Smith, J., & Clare, A. T. (2021). Unveiling surfaces for advanced materials characterisation with large-area electrochemical jet machining. Materials and Design, 202, Article 109539. https://doi.org/10.1016/j.matdes.2021.109539

Surface preparation for advanced materials inspection methods like electron backscatter diffraction (EBSD) generally involve laborious and destructive material sectioning and sequential polishing steps, as EBSD is sensitive to both sample topography... Read More about Unveiling surfaces for advanced materials characterisation with large-area electrochemical jet machining.

Surface integrity in metal machining - Part I: Fundamentals of surface characteristics and formation mechanisms (2020)
Journal Article
Liao, Z., la Monaca, A., Murray, J., Speidel, A., Ushmaev, D., Clare, A., Axinte, D., & M'Saoubi, R. (2021). Surface integrity in metal machining - Part I: Fundamentals of surface characteristics and formation mechanisms. International Journal of Machine Tools and Manufacture, 162, 1-51. https://doi.org/10.1016/j.ijmachtools.2020.103687

The surface integrity of machined metal components is critical to their in-service functionality, longevity and overall performance. Surface defects induced by machining operations vary from the nano to macro scale, which cause microstructural, mecha... Read More about Surface integrity in metal machining - Part I: Fundamentals of surface characteristics and formation mechanisms.

Design of a resonant Luneburg lens for surface acoustic waves (2020)
Journal Article
Fuentes-Domínguez, R., Yao, M., Colombi, A., Dryburgh, P., Pieris, D., Jackson-Crisp, A., Colquitt, D., Clare, A., Smith, R. J., & Clark, M. (2021). Design of a resonant Luneburg lens for surface acoustic waves. Ultrasonics, 111, Article 106306. https://doi.org/10.1016/j.ultras.2020.106306

© 2020 In this work we employ additive manufacturing to print a circular array of micropillars on an aluminium slab turning its top surface into a graded index metasurface for surface acoustic waves (SAW). The graded metasurface reproduces a Luneburg... Read More about Design of a resonant Luneburg lens for surface acoustic waves.

Tailored elastic surface to body wave Umklapp conversion (2020)
Journal Article
Chaplain, G. J., De Ponti, J. M., Colombi, A., Fuentes-Dominguez, R., Dryburg, P., Pieris, D., Smith, R. J., Clare, A., Clark, M., & Craster, R. V. (2020). Tailored elastic surface to body wave Umklapp conversion. Nature Communications, 11(1), Article 3267. https://doi.org/10.1038/s41467-020-17021-x

© 2020, The Author(s). Elastic waves guided along surfaces dominate applications in geophysics, ultrasonic inspection, mechanical vibration, and surface acoustic wave devices; precise manipulation of surface Rayleigh waves and their coupling with pol... Read More about Tailored elastic surface to body wave Umklapp conversion.

Generation of graded porous structures by control of process parameters in the selective laser melting of a fixed ratio salt-metal feedstock (2020)
Journal Article
Aboulkhair, N. T., Zhao, G., Hague, R. J., Kennedy, A. R., Ashcroft, I. A., & Clare, A. T. (2020). Generation of graded porous structures by control of process parameters in the selective laser melting of a fixed ratio salt-metal feedstock. Journal of Manufacturing Processes, 55, 249-253. https://doi.org/10.1016/j.jmapro.2020.04.039

The demonstration of salt dissolution incorporated within laser powder-bed fusion fabrication processes has allowed the creation of complex porous structures without the need for sophisticated design algorithms. This serves to simplify the process, f... Read More about Generation of graded porous structures by control of process parameters in the selective laser melting of a fixed ratio salt-metal feedstock.

A novel numerical method to predict the transient track geometry and thermomechanical effects through in-situ modification of the process parameters in Direct Energy Deposition (2019)
Journal Article
Walker, T. R., Bennett, C. J., Lee, T. L., & Clare, A. T. (2020). A novel numerical method to predict the transient track geometry and thermomechanical effects through in-situ modification of the process parameters in Direct Energy Deposition. Finite Elements in Analysis and Design, 169, Article 103347. https://doi.org/10.1016/j.finel.2019.103347

© 2019 Elsevier B.V. Direct Energy Deposition (DED) is being widely used to repair damaged components to increase service life and economical operation. Process parameters including laser power, traverse speed and the mass flowrate of the feedstock m... Read More about A novel numerical method to predict the transient track geometry and thermomechanical effects through in-situ modification of the process parameters in Direct Energy Deposition.

Spheroidisation of metal powder by pulsed electron beam irradiation (2019)
Journal Article
Murray, J., Simonelli, M., Speidel, A., Grant, D., & Clare, A. (2019). Spheroidisation of metal powder by pulsed electron beam irradiation. Powder Technology, 350, 100-106. https://doi.org/10.1016/j.powtec.2019.03.041

A new powder spheroidisation process has been demonstrated using a large-area, pulsed electron beam technique. This was used to dramatically improve the surface morphology of Stellite 6 metal powder. Powder surface asperities up to 20 μm size can be... Read More about Spheroidisation of metal powder by pulsed electron beam irradiation.

Spatially Resolved Acoustic Spectroscopy Towards Online Inspection of Additive Manufacturing (2019)
Journal Article
Pieris, D., Patel, R., Dryburgh, P., Hirsch, M., Li, W., Sharples, S., Smith, R., Clare, A., & Clark, M. (2019). Spatially Resolved Acoustic Spectroscopy Towards Online Inspection of Additive Manufacturing. Insight - Non-Destructive Testing & Condition Monitoring, 61(3), 132-137. https://doi.org/10.1784/insi.2019.61.3.132

High-integrity engineering applications such as aerospace will not permit the incorporation of components containing
any structural defects. The current generation of additive manufacturing (AM) platforms yield components with relatively
high level... Read More about Spatially Resolved Acoustic Spectroscopy Towards Online Inspection of Additive Manufacturing.

Direct-writing by active tooling in electrochemical jet processing (2019)
Journal Article
Mitchell-Smith, J., Bisterov, I., Speidel, A., Ashcroft, I., & Clare, A. T. (2019). Direct-writing by active tooling in electrochemical jet processing. Manufacturing Letters, 19, 15-20. https://doi.org/10.1016/j.mfglet.2019.01.001

Recent innovations in electrochemical jet processing have caused step changes in process flexibility and precision. However, utilisation of these innovations requires the development of new machine tool technology. Presented here is a new methodology... Read More about Direct-writing by active tooling in electrochemical jet processing.