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- W3100707288 abstract "Biocompatible β Ti-alloys with high strength and low modulus are of interest for additive manufacturing of biomedical implants. In this study, a metastable β Ti-12Mo-6Zr-2Fe (TMZF) alloy with highly dense structure was successfully fabricated by laser powder bed fusion (LPBF) from low-cost elemental powders. The applied different scanning strategies (simple and chess scan), and post heat treatment can regulate both the texture and secondary phases. The formation of strong {100}< 001 > texture leads to the low elastic modulus of TMZF alloys, while nano-sized α phases induce significantly strengthening effect. The as-fabricated TMZF alloy via simple scanning strategy shows considerably high strength due to the high density of α, ω phases and sessile dislocations, but it is brittle owing to the presence of ω phase. The TMZF alloy, manufactured using chess scanning strategy, possessed high yield strength of 1,026 MPa, low modulus of 85.7 GPa and good ductility of 12.7%. This results from its unique hierarchical microstructure containing α phases, heterogeneous grains and the formation of {100}< 001 > texture. After solution heat treatment, the specimens exhibit stronger {100} < 001 > texture, hence lower modulus of 70.9 GPa. High yield strength of 943 MPa was maintained due to the formation of plate-like α precipitates. The TMZF alloy fabricated by in-situ alloying based LPBF demonstrates comparable strength to that of Ti-6Al-4V alloy, but much lower elastic modulus, suggesting that it could be a potential candidate for some implant applications." @default.
- W3100707288 created "2020-11-23" @default.
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- W3100707288 date "2021-01-01" @default.
- W3100707288 modified "2023-10-10" @default.
- W3100707288 title "A high strength and low modulus metastable β Ti-12Mo-6Zr-2Fe alloy fabricated by laser powder bed fusion in-situ alloying" @default.
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- W3100707288 doi "https://doi.org/10.1016/j.addma.2020.101708" @default.
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