A high-temperature Ti-6.8Al-6.8Zr-2.3V-2.1Mo-0.7Nb alloy suitable for laser-additive manufacturing
Materials Science and Engineering: A, ISSN: 0921-5093, Vol: 883, Page: 145519
2023
- 4Citations
- 6Captures
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Article Description
A high-temperature Ti-6.8Al-6.8Zr-2.3V-2.1Mo-0.7Nb alloy suitable for laser additive manufacturing is designed on the basis of the cluster formula of Ti–6Al–4V, composed of twelve α-[Al–Ti 12 ](AlTi 2 ) units and five β-[Al–Ti 12 Zr 2 ](AlV 1.2 Mo 0.6 Nb 0.2 ) ones, featuring enhanced β stability via Zr, Mo, Nb, and V co-alloying. Using pre-alloyed powders, this alloy shows a fine surface roughness about 83 μm, which is comparable to that of reported Ti–6Al–4V. The as-deposited alloy exhibits a typical bimodal basket-weave microstructure and superior mechanical properties at room temperature (ultimate tensile strength (UTS) of 1348 MPa, yield strength (YS) of 1253 MPa, and elongation of 4.4%) as well as at 600 °C (UTS of 657 MPa, YS of 578 MPa, and elongation of 44.6%), which are comparable to wrought-state high-temperature Ti alloys. At 650 °C, its UTS of 424 MPa and YS of 337 MPa still maintains a high level.
Bibliographic Details
http://www.sciencedirect.com/science/article/pii/S0921509323009437; http://dx.doi.org/10.1016/j.msea.2023.145519; http://www.scopus.com/inward/record.url?partnerID=HzOxMe3b&scp=85166633485&origin=inward; https://linkinghub.elsevier.com/retrieve/pii/S0921509323009437; https://dx.doi.org/10.1016/j.msea.2023.145519
Elsevier BV
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