Lenticular twinning within α’ martensite in Ti-6Al-4V at early deformation stage

Abstract

Twinning in a’ martensite in titanium alloys often occurs during rapid cooling or thermal cycling such as additive manufacturing process. This work reported α’ martensitic microstructure formed in Ti-6Al-4V alloy after room-temperature compression to ∼5% strain. Large-scale lenticular deformation twins were observed in martensite for the first time, which were evidently different in morphology and twinning system from nanotwins in quenched martensite. The emergence of such twins at only ∼5% strain resulted from variant selection and larger thickness of martensite and different stress state in martensite during deformation.

Document Type

Journal Article

Date of Publication

8-1-2023

Volume

30

Publication Title

Materialia

Publisher

Elsevier

School

School of Engineering / Centre for Advanced Materials and Manufacturing

RAS ID

61963

Funders

National Natural Science Foundation of China / Natural Science Foundation of Shanghai / Foundation of Xi’an Key Laboratory of High-Performance Titanium Alloy / Major Special Science and Technology Project of Yunnan Province

Comments

Zhang, B. H., Yang, Y., Zhao, Z. B., Zhang, K., Xin, S. W., Zhang, S. Y., . . . Zhang, L. C. (2023). Lenticular twinning within α’ martensite in Ti-6Al-4V at early deformation stage. Materialia, 30, article 101838. https://doi.org/10.1016/j.mtla.2023.101838

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Link to publisher version (DOI)

10.1016/j.mtla.2023.101838