Mechanical anisotropy of Ti-6AI-4V alloy with α' martensite microstructure

Hiroaki Matsumoto, Hiroshi Yoneda, Bin Liu, Yunpig Li, Akihiko Chiba

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

1 Citation (Scopus)

Abstract

Ti-6A1-4V alloy are widely used for industrial applications because it combines excellent mechanical properties with low density. During hot-or cold working of Ti-6A1-4V alloy, the grains develop preferred orientations or texture accompanied by the deformation. recrystalligation, grain growth or phase transformation. Such the texture formation results in pronounced anisotropy in mechanical properties. The microstructure consisting of α' martensite phase is expected to reduce the mechanical anisotropy in products of sheet and bar.due to the formation of relatively random crystallographic orientations in α' as compared to equilibrium (α+β). In this work, the mechanical anisotropy of Ti-6A1-4V alloy with α' martensite microstructure is examined with comparing the mechanical properties of alloy with equilibrium (α+β) microstructure. The Ti-6A1-4V alloy heat treated at 1223 K and quenched into ice-water exhibits the (α+α) duplex microstructure and relatively random crystallographic orientations as compared to that in alloy with equilibrium (α+β) microstructure. The mechanical anisotropics of Young's modulus, strength and e- longation to fracture in Ti-6A1-4V alloy-plate are reduced by the formation of the (α+α) duplex microstructure. This result indicates that for-mation of α' martensite microstructure is effective for reducing the mechanical anisotropy in Ti-6A1-4V alloy-plate.

Original languageEnglish
Title of host publicationTi 2011 - Proceedings of the 12th World Conference on Titanium
Pages968-971
Number of pages4
Publication statusPublished - 2012 Dec 1
Event12th World Conference on Titanium, Ti 2011 - Beijing, China
Duration: 2011 Jun 192011 Jun 24

Publication series

NameTi 2011 - Proceedings of the 12th World Conference on Titanium
Volume2

Other

Other12th World Conference on Titanium, Ti 2011
CountryChina
CityBeijing
Period11/6/1911/6/24

Keywords

  • Crystallographic orientation
  • Martensite microstructure
  • Mechanical anisotropy
  • Titanium alloy

ASJC Scopus subject areas

  • Ceramics and Composites

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