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As a trial to realize kink band strengthening in titanium alloys, slight cold rolling followed by aging heat treatment were applied on Ti–12 mass% Mo alloys for obtaining mille-feuille-like layered hcp (α)/bcc (β) two phase structure. After slight cold rolling at rolling reduction of 5% and subsequent aging heat treatment at 973 K for 180 ks, plate-like α phases were precipitated in the β phase matrix and made an alternately stacked mille-feuille-like α/β layered structure. These α phases were precipitated on the boundary of {3 3 2}〈1 1 3〉 β type deformed twins introduced in the β phase matrix during the slight cold rolling. The thin film-like α phase precipitated at a very early stage of aging, and became thicker during aging to produce the mille-feuille-like α/β layered structure.

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Keyword: aging, slight cold rolling, Ti-Mo alloys, layered structure, {3 3 2}〈1 1 3〉 β twinning

Date published: 2020-05-01

Publisher: The Japan Institute of Metals and Materials

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Manuscript type: Author's original (Submitted manuscript)

MDR DOI: https://doi.org/10.48505/nims.1437

First published URL: https://doi.org/10.2320/matertrans.MT-MM2019002

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Updated at: 2024-01-05 22:13:37 +0900

Published on MDR: 2021-08-13 01:20:04 +0900