Hot deformation behavior of Ti-6Al-4V alloy with α' martensite starting microstructure

Hiroaki Matsumoto, Bin Liu, Sang Hak Lee, Yunping Li, Kazuhisa Sato, Yoshiki Ono, Akihiko Chiba

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Citation (Scopus)

Abstract

Hot deformation behavior and microstructural evolution of Ti-6A1-4V alloy in case of α' martensite starting microstructure were examined by comparing the case in equilibrium (α+β) starting microstructure. Compression test was carried out at 1173 K and 1273 K at strain rates of 0.001s -1 and 1s -1. In compression test in temperature region of (α+β), equiaxed grained structure is exhibited for both starting microstructures of α' martensite and equilibrium (α+β) after compression test. Then, distortion-less ultrafine grained microstructure is obtained in case of α' martensite starting microstructure after hot compression at condition of 1173 K-1s -1. While, the lamellar microstructure consisting of α phase and β phase is obtained after compression at 1273 K, which is above the β-transus of 1268 K, for both the cases of α' starting microstructure and as-received (α+β) starting microstructure. These results indicate that hot deformation behavior in the cases of α' martensite- and (α+β) starting microstructure is different especially at the temperature (1173 K) which is below the β-transus.

Original languageEnglish
Title of host publicationTMS 2012 - 141st Annual Meeting and Exhibition, Supplemental Proceedings
Pages873-876
Number of pages4
Publication statusPublished - 2012 May 14
Event141st Annual Meeting and Exhibition, TMS 2012 - Orlando, FL, United States
Duration: 2012 Mar 112012 Mar 15

Publication series

NameTMS Annual Meeting
Volume2

Other

Other141st Annual Meeting and Exhibition, TMS 2012
Country/TerritoryUnited States
CityOrlando, FL
Period12/3/1112/3/15

Keywords

  • Alpha prime martensite
  • Hot deformation
  • Microstructure
  • Titanium alloy

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Mechanics of Materials
  • Metals and Alloys

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