All Outputs (29)

Microstructural evolution in laser melted boron alloyed Ti-6Al-4V (2024)
Journal Article
Hizli, H., Zou, Z., Murray, J., Clare, A., & Simonelli, M. (2024). Microstructural evolution in laser melted boron alloyed Ti-6Al-4V. Journal of Alloys and Compounds, 981, Article 173762

Grain refinement in cast titanium alloys has been demonstrated through the addition of boron (B) in hypoeutectic concentration. However, there is still a poor understanding of how effective B is towards microstructural refinement under rapid solidifi... Read More about Microstructural evolution in laser melted boron alloyed Ti-6Al-4V.

Off the Grid: a new strategy for material-jet 3D printing with enhanced sub-droplet resolution (2023)
Journal Article
Nelson-Dummett, O., Rivers, G., Gilani, N., Simonelli, M., Tuck, C. J., Wildman, R. D., …Turyanska, L. (2024). Off the Grid: a new strategy for material-jet 3D printing with enhanced sub-droplet resolution. Additive Manufacturing Letters, 8, Article 100185. https://doi.org/10.1016/j.addlet.2023.100185

Drop-on-Demand additive manufacturing could offer a facile solution for scalable on-site manufacturing. With an increasing number of functional materials available for this technology, there are growing opportunities for applications, such as electro... Read More about Off the Grid: a new strategy for material-jet 3D printing with enhanced sub-droplet resolution.

On the development of twinning-induced plasticity in additively manufactured 316L stainless steel (2023)
Journal Article
Crociata, D. D., Maskery, I., Hague, R., & Simonelli, M. (2023). On the development of twinning-induced plasticity in additively manufactured 316L stainless steel. Additive Manufacturing Letters, 7, Article 100176. https://doi.org/10.1016/j.addlet.2023.100176

A report on twinning-induced plasticity in 316L stainless steel manufactured by metal additive manufacturing (AM) is presented. A tapered tensile test geometry was used which enabled the investigation of twin formation over a range of strain levels i... Read More about On the development of twinning-induced plasticity in additively manufactured 316L stainless steel.

The development of ultrafine grain structure in an additively manufactured titanium alloy via high-temperature microscopy (2023)
Journal Article
Simonelli, M., Zou, Z., Barriobero-Vila, P., & Tse, Y. Y. (2023). The development of ultrafine grain structure in an additively manufactured titanium alloy via high-temperature microscopy. Materialia, 30, Article 101856. https://doi.org/10.1016/j.mtla.2023.101856

Microstructures dominated by acicular α' martensitic phase, such as in the case of Ti-6Al-4V fabricated by laser powder-bed fusion (PBF-LB), are known to suffer from reduced ductility and low toughness. The decomposition of such metastable microstruc... Read More about The development of ultrafine grain structure in an additively manufactured titanium alloy via high-temperature microscopy.

Facile manipulation of mechanical properties of Ti-6Al-4V through composition tailoring in laser powder bed fusion (2023)
Journal Article
Du, X., Simonelli, M., Murray, J. W., & Clare, A. T. (2023). Facile manipulation of mechanical properties of Ti-6Al-4V through composition tailoring in laser powder bed fusion. Journal of Alloys and Compounds, 941, Article 169022. https://doi.org/10.1016/j.jallcom.2023.169022

Ti-6Al-4 V alloy when processed by laser powder bed fusion (LPBF) is a useful material which can be used for the manufacture of complex 3D components for aerospace and medical applications. LPBF fabricated Ti-6Al-4 V typically shows high tensile stre... Read More about Facile manipulation of mechanical properties of Ti-6Al-4V through composition tailoring in laser powder bed fusion.

Increasing the build rate of high-strength aluminium alloys produced by laser powder bed fusion (2023)
Journal Article
Del Guercio, G., & Simonelli, M. (2023). Increasing the build rate of high-strength aluminium alloys produced by laser powder bed fusion. Optics and Laser Technology, 161, Article 109133. https://doi.org/10.1016/j.optlastec.2023.109133

Aluminium alloys from the 2xxx series represent important structural materials due to their optimal combination of strength and corrosion resistance. However, their production by means of laser powder bed fusion (PBF-LB/M) is hampered by the presence... Read More about Increasing the build rate of high-strength aluminium alloys produced by laser powder bed fusion.

From impact to solidification in drop-on-demand metal additive manufacturing using MetalJet (2022)
Journal Article
Gilani, N., Aboulkhair, N. T., Simonelli, M., East, M., Ashcroft, I. A., & Hague, R. J. (2022). From impact to solidification in drop-on-demand metal additive manufacturing using MetalJet. Additive Manufacturing, 55, Article 102827. https://doi.org/10.1016/j.addma.2022.102827

Drop-on-demand metal jetting is a promising additive manufacturing (AM) technology that is gaining interest due to its capability to directly print complex single and multi-material components at high resolutions. It also has key advantages over othe... Read More about From impact to solidification in drop-on-demand metal additive manufacturing using MetalJet.

Cracking behaviour of high-strength AA2024 aluminium alloy produced by Laser Powder Bed Fusion (2022)
Journal Article
Del Guercio, G., McCartney, D. G., Aboulkhair, N. T., Robertson, S., Maclachlan, R., Tuck, C., & Simonelli, M. (2022). Cracking behaviour of high-strength AA2024 aluminium alloy produced by Laser Powder Bed Fusion. Additive Manufacturing, 54, Article 102776. https://doi.org/10.1016/j.addma.2022.102776

Most wrought aluminium alloys of the 2000 series are difficult to manufacture by laser powder bed fusion (L-PBF) due to the formation of cracks during building. To date, the effects of processing regimes on crack formation are still not well understo... Read More about Cracking behaviour of high-strength AA2024 aluminium alloy produced by Laser Powder Bed Fusion.

Insights into drop-on-demand metal additive manufacturing through an integrated experimental and computational study (2021)
Journal Article
Gilani, N., Aboulkhair, N. T., Simonelli, M., East, M., Ashcroft, I., & Hague, R. J. (2021). Insights into drop-on-demand metal additive manufacturing through an integrated experimental and computational study. Additive Manufacturing, 48(Part B), Article 102402. https://doi.org/10.1016/j.addma.2021.102402

Drop-on-demand metal jetting is a recent additive manufacturing technology opening new opportunities for the fabrication of complex single and multi-metal components. MetalJet, the Océ developed technique used in this study, has the capacity to produ... Read More about Insights into drop-on-demand metal additive manufacturing through an integrated experimental and computational study.

Alloy design against the solidification cracking in fusion additive manufacturing: an application to a FeCrAl alloy (2021)
Journal Article
Dovgyy, B., Simonelli, M., & Pham, M. S. (2021). Alloy design against the solidification cracking in fusion additive manufacturing: an application to a FeCrAl alloy. Materials Research Letters, 9(8), 350-357. https://doi.org/10.1080/21663831.2021.1922945

This study developed a design methodology against liquid-state cracking by combining the Scheil–Gulliver solidification simulations and Machine Learning analysis to design alloys for Fusion Additive Manufacturing. Applying this design approach result... Read More about Alloy design against the solidification cracking in fusion additive manufacturing: an application to a FeCrAl alloy.

Microstructure and tensile properties of additive manufactured Ti-6Al-4V with refined prior-? grain structure obtained by rapid heat treatment (2021)
Journal Article
Zou, Z., Simonelli, M., Katrib, J., Dimitrakis, G., & Hague, R. (2021). Microstructure and tensile properties of additive manufactured Ti-6Al-4V with refined prior-? grain structure obtained by rapid heat treatment. Materials Science and Engineering: A, 814, Article 141271. https://doi.org/10.1016/j.msea.2021.141271

Heat treatments tailored for additive manufactured Ti-6Al-4V can be used to attain desirable microstructures associated with superior mechanical properties. Rapid heat treatments, for example, can be used to recrystallise the microstructure of laser... Read More about Microstructure and tensile properties of additive manufactured Ti-6Al-4V with refined prior-? grain structure obtained by rapid heat treatment.

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.

The Influence of Iron in Minimizing the Microstructural Anisotropy of Ti-6Al-4V Produced by Laser Powder-Bed Fusion (2020)
Journal Article
Simonelli, M., McCartney, D. G., Barriobero-Vila, P., Aboulkhair, N. T., Tse, Y. Y., Clare, A., & Hague, R. (2020). The Influence of Iron in Minimizing the Microstructural Anisotropy of Ti-6Al-4V Produced by Laser Powder-Bed Fusion. Metallurgical and Materials Transactions A, 51, 2444–2459. https://doi.org/10.1007/s11661-020-05692-6

There remains a significant challenge in adapting alloys for metal based Additive Manufacturing (AM). Adjusting alloy composition to suit the process, particularly under regimes close to industrial practice, is therefore a potential solution. With th... Read More about The Influence of Iron in Minimizing the Microstructural Anisotropy of Ti-6Al-4V Produced by Laser Powder-Bed Fusion.

Refinement of the grain structure of additive manufactured titanium alloys via epitaxial recrystallization enabled by rapid heat treatment (2020)
Journal Article
Zou, Z., Simonelli, M., Katrib, J., Dimitrakis, G., & Hague, R. (2020). Refinement of the grain structure of additive manufactured titanium alloys via epitaxial recrystallization enabled by rapid heat treatment. Scripta Materialia, 180, 66-70. https://doi.org/10.1016/j.scriptamat.2020.01.027

The coarse prior-? grain structure in titanium alloys produced by additive manufacturing is associated to mechanical anisotropy and limited fatigue life. Here we report a novel methodology to refine such structure by rapid heat treatment of Ti-6Al-4V... Read More about Refinement of the grain structure of additive manufactured titanium alloys via epitaxial recrystallization enabled by rapid heat treatment.

Towards digital metal additive manufacturing via high-temperature drop-on-demand jetting (2019)
Journal Article
Simonelli, M., Aboulkhair, N., Rasa, M., East, M., Tuck, C., Wildman, R., …Hague, R. (2019). Towards digital metal additive manufacturing via high-temperature drop-on-demand jetting. Additive Manufacturing, 30, Article 100930. https://doi.org/10.1016/j.addma.2019.100930

Drop-on-demand jetting of metals offers a fully digital manufacturing approach to surpass the limitations of the current generation powder-based additive manufacturing technologies. However, research on this topic has been restricted mainly to near-n... Read More about Towards digital metal additive manufacturing via high-temperature drop-on-demand jetting.

Evolution of carbon nanotubes and their metallurgical reactions in Al-based composites in response to laser irradiation during selective laser melting (2019)
Journal Article
Aboulkhair, N. T., Simonelli, M., Salama, E., Rance, G., Neate, N. C., Tuck, C. J., …Hague, R. J. (2019). Evolution of carbon nanotubes and their metallurgical reactions in Al-based composites in response to laser irradiation during selective laser melting. Materials Science and Engineering: A, 765, Article 138307. https://doi.org/10.1016/j.msea.2019.138307

Aluminium-based composites reinforced with carbon nanotubes are widely sought for their outstanding metallurgical and structural properties that largely depend on the manufacturing route. In this work, the process-structure-property relationship for... Read More about Evolution of carbon nanotubes and their metallurgical reactions in Al-based composites in response to laser irradiation during selective laser melting.

3D printing of Aluminium alloys: Additive Manufacturing of Aluminium alloys using selective laser melting (2019)
Journal Article
Aboulkhair, N. T., Simonelli, M., Parry, L., Ashcroft, I., Tuck, C., & Hague, R. (2019). 3D printing of Aluminium alloys: Additive Manufacturing of Aluminium alloys using selective laser melting. Progress in Materials Science, 106, https://doi.org/10.1016/j.pmatsci.2019.100578

© 2019 The Authors Metal Additive Manufacturing (AM) processes, such as selective laser melting (SLM), enable the fabrication of arbitrary 3D-structures with unprecedented degrees of freedom. Research is rapidly progressing in this field, with promis... Read More about 3D printing of Aluminium alloys: Additive Manufacturing of Aluminium alloys using selective laser melting.

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??m size can be... Read More about Spheroidisation of metal powder by pulsed electron beam irradiation.

A comparison of Ti-6Al-4V in-situ alloying in Selective Laser Melting using simply-mixed and satellited powder blend feedstocks (2018)
Journal Article
Simonelli, M., Aboulkhair, N. T., Cohen, P., Murray, J. W., Clare, A. T., Tuck, C., & Hague, R. J. (in press). A comparison of Ti-6Al-4V in-situ alloying in Selective Laser Melting using simply-mixed and satellited powder blend feedstocks. Materials Characterization, https://doi.org/10.1016/j.matchar.2018.05.039

In-situ alloying within laser powder-bed fusion, specifically Selective Laser Melting (SLM), has been investigated for the formulation of novel alloys from elemental powders to extend the benefits offered by these technologies. Inadequate preparation... Read More about A comparison of Ti-6Al-4V in-situ alloying in Selective Laser Melting using simply-mixed and satellited powder blend feedstocks.

Effect of annealing on the microstructure and magnetic properties of soft magnetic Fe-Si produced via laser additive manufacturing (2018)
Journal Article
Garibaldi, M., Ashcroft, I., Lemke, J. N., Simonelli, M., & Hague, R. (2018). Effect of annealing on the microstructure and magnetic properties of soft magnetic Fe-Si produced via laser additive manufacturing. Scripta Materialia, 142, 121-125. https://doi.org/10.1016/j.scriptamat.2017.08.042

© 2017 Acta Materialia Inc. We investigate the effect of annealing on the properties of Fe-6.9wt% Si produced by Selective Laser Melting (SLM), a powder-bed additive manufacturing technology. Results show that annealing at 1150 °C for 1 h produces a... Read More about Effect of annealing on the microstructure and magnetic properties of soft magnetic Fe-Si produced via laser additive manufacturing.