AccScience Publishing / MSAM / Volume 3 / Issue 3 / DOI: 10.36922/msam.3506
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ORIGINAL RESEARCH ARTICLE

The effect of thermal rest time during in situ alloying of Ti41Nb through laser powder bed fusion

Guo Ren Chou1 ,  Sheng Huang1,2 ,  Swee Leong Sing3*
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1 School of Mechanical and Aerospace Engineering, Nanyang Technological University, 50 Nanyang Avenue, 639798, Singapore
2 Singapore Centre for 3D Printing, Nanyang Technological University, 50 Nanyang Avenue, 639798, Singapore
3 Department of Mechanical Engineering, National University of University, 9 Engineering Drive 1, 117575, Singapore
MSAM 2024, 3(3), 3506 https://doi.org/10.36922/msam.3506
Submitted: 25 April 2024 | Accepted: 26 August 2024 | Published: 11 September 2024
© 2024 by the Author(s). This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution 4.0 International License ( https://creativecommons.org/licenses/by/4.0/ )
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Abstract

This study investigates the impact of thermal rest time variation on in situ alloying of Ti41Nb (wt.%) within a single part, building on previous research that utilized a short stripe width scanning strategy to promote interaction between individual melt pools. Employing a contour scan from the part center outwards, diverse thermal rest times were achieved at different locations within the component. Results revealed a significant influence of varying thermal rest times on the amount of unmelted Nb and mechanical properties of the part. The findings underscore the importance of considering thermal rest time in in situ alloying and laser powder bed fusion (LPBF) printing in general, as it can markedly affect print quality. This study contributes valuable insights for optimizing LPBF processing parameters and advancing the understanding of in situ alloying through LPBF.

Keywords
Additive manufacturing
3D Printing
Ti–Nb
Powder bed fusion
Selective laser melting
Funding
This research is supported by the National Research Foundation, Prime Minister’s Office, Singapore under its Medium-Sized Centre funding scheme.
Conflict of interest
Swee Leong Sing serves as the Associate Editor of the journal, but did not in any way involve in the editorial and peer-review process conducted for this paper, directly or indirectly. Other authors declare they have no competing interests.
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Materials Science in Additive Manufacturing, Electronic ISSN: 2810-9635 Published by AccScience Publishing
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