Microstructural Evolution of the Near-α Titanium Alloy Fabricated by Laser Powder Bed Fusion

Yi Liu

doi:10.6919/ICJE.202504_11(4).0063

Authors

Yi Liu

DOI:

https://doi.org/10.6919/ICJE.202504_11(4).0063

Keywords:

TA15; Laser Powder Bed Fusion (LPBF); Heat Treatment.

Abstract

Laser powder bed fusion (LPBF) is a promising additive manufacturing technique. In this paper, the microstructure of TA15 (Ti-6.5Al-2Zr-1Mo-1V) fabricated by LPBF and the reason for martensite decomposition were studied. The faster cooling rate during LPBF leads to the formation of a large amount of α′ martensite, which results in high strength but poor toughness of as-built TA15, making it susceptible to brittle fracture. During the heat treatment to regulate the microstructure. This work marks an important step in understanding the microstructural modifications of the LPBF process for high-performance TA15 alloys.

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