The microstructure and tensile properties of additively manufactured Ti–6Al–2Zr–1Mo–1V with a trimodal microstructure obtained by multiple annealing heat treatment

Zhang, Sheng; Zhang, Yuqi; Zou, Zhiyi; Shi, Yusheng; Zang, Yong

Abstract

Unlike acicular martensite, combining a lamellar and equiaxed α microstructure is known to impart high ductility for Ti-6.5Al–2Zr–1Mo–1V (TA15). In this article, we report innovative heat treatment aimed at optimizing the mechanical properties of additively manufactured TA15. After the proposed heat treatment, a trimodal microstructure consisting of equiaxed α, lamellar α, and a transformed β matrix was obtained. The resulting tensile properties were equivalent to those of forged TA15 counterparts. This paper discusses in detail the microstructure evolution involved in the heat treatment, as well as the microstructure–mechanical property relationships. The exceptional combination of strength and ductility obtained after the proposed heat treatment can allow the full exploitation of the additive manufacturing advantages of this excellent material.

Citation

Zhang, S., Zhang, Y., Zou, Z., Shi, Y., & Zang, Y. (2022). The microstructure and tensile properties of additively manufactured Ti–6Al–2Zr–1Mo–1V with a trimodal microstructure obtained by multiple annealing heat treatment. Materials Science and Engineering: A, 831, Article 142241. https://doi.org/10.1016/j.msea.2021.142241

• Journal Article Type: Article
• Acceptance Date: Oct 25, 2021
• Online Publication Date: Oct 28, 2021
• Publication Date: Jan 13, 2022
• Deposit Date: Dec 9, 2021
• Publicly Available Date: Oct 29, 2022
• Journal: Materials Science and Engineering: A
• Print ISSN: 0921-5093
• Electronic ISSN: 0921-5093
• Publisher: Elsevier
• Peer Reviewed: Peer Reviewed
• Volume: 831
• Article Number: 142241
• DOI: https://doi.org/10.1016/j.msea.2021.142241
• Keywords: Mechanical Engineering; Mechanics of Materials; Condensed Matter Physics; General Materials Science
• Public URL: https://nottingham-repository.worktribe.com/output/6914786
• Publisher URL: https://www.sciencedirect.com/science/article/abs/pii/S0921509321015057
• Additional Information: This article is maintained by: Elsevier; Article Title: The microstructure and tensile properties of additively manufactured Ti–6Al–2Zr–1Mo–1V with a trimodal microstructure obtained by multiple annealing heat treatment; Journal Title: Materials Science and Engineering: A; CrossRef DOI link to publisher maintained version: https://doi.org/10.1016/j.msea.2021.142241; Content Type: article; Copyright: © 2021 Elsevier B.V. All rights reserved.