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Formation of Ultrafine-Grained Microstructure of Ti–6Al–4V Alloy by Hot Deformation of α′ Martensite Starting Microstructure

✍ Scribed by Hiroaki Matsumoto; Sang-Hak Lee; Yoshiki Ono; Yunping Li; Akihiko Chiba

Publisher: John Wiley and Sons
Year: 2011
Tongue: English
Weight: 584 KB
Volume: 13
Category: Article
ISSN: 1438-1656
DOI: 10.1002/adem.201000317

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✦ Synopsis

Abstract

We have presented a formation of ultrafine‐grained microstructure (d~α~ ≈ 0.2 µm) of industrial Ti–6Al–4V alloy produced by the hot compression of a sample with the acicular α′ martensite starting microstructure. The hot‐deformation behavior was different from the case of the conventional (α + β) starting microstructure, that is, the phase transformation of α′/(α + β) during hot working enhanced the microstructural conversion, especially under the conditions of a low temperature and a high‐strain rate.

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