The preparation and properties studies for Ti-25Ta alloy fabricated by laser powder bed fusion technology

Mu Gao; Dingyong He; Xingye Guo

doi:10.1117/12.2644135

21 December 2022 The preparation and properties studies for Ti-25Ta alloy fabricated by laser powder bed fusion technology

Mu Gao, Dingyong He, Xingye Guo

Author Affiliations +

Proceedings Volume 12312, Advanced Laser Processing and Manufacturing VI; 123120L (2022) https://doi.org/10.1117/12.2644135
Event: SPIE/COS Photonics Asia, 2022, Online Only

Abstract

The Ti-25Ta alloy was fabricated by LPBF using mechanically mixed powders. It was found that the relative density, phase composition, and surface roughness were quite different with different LPBF preparation parameters. The Ti-25Ta alloy samples have a high relative density (>99.9%) with better surface roughness at faster scan speed, and thereby lower laser energy density. However, the amount of unmelted Ta particles increased at a lower energy density. In addition, the energy input of the LPBF process had a great influence on the phase formation of Ti-25Ta due to element composition differences. The α' phase was mainly dominated in Ti-25Ta samples under lower laser energy density while changing to the α" phase gradually with the increase of laser energy density. The SEM image and XRD analysis were applied to show the characteristics. The micro-hardness of Ti-25Ta samples under various LPBF parameters was tested for proving the difference in the phase composition.

Conference Presentation

Citation Download Citation

Mu Gao, Dingyong He, and Xingye Guo "The preparation and properties studies for Ti-25Ta alloy fabricated by laser powder bed fusion technology", Proc. SPIE 12312, Advanced Laser Processing and Manufacturing VI, 123120L (21 December 2022); https://doi.org/10.1117/12.2644135

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