Relationship between microstructures and mechanical properties in Ti4.5Al2Mo1.6V0.5Fe0.3Si0.03C for next-generation aircraft applications

Toshikazu Akahori, Mitsuo Niinomi, Masaaki Nakai, Harumi Tsutsumi, Shiro Aki, Yoshio Itsumi, Shogo Murakami, Hideto Oyama

研究成果: Article査読

2 被引用数 (Scopus)

抄録

The effects of various heat treatments on the microstructure and mechanical properties of an (α + β)-type titanium alloy, Ti4.5Al2Mo1.6V0.5Fe0. 3Si0.03C (KS Ti-9), were investigated systematically for possible use in next-generation aircraft applications. The as-received KS Ti-9 shows strong anisotropy of mechanical strength derived from the intense texture (T-texture) of the primary α phase. This anisotropy continues to be observed in KS Ti-9 annealed at a temperature below β transus followed by air cooling, but the anisotropy drastically decreases in KS Ti-9 when subjected to a duplex heat treatment, that is, when the as-received material of KS Ti-9 is sequentially heated to a temperature slightly below β transus followed by water quenching and then annealed followed by air cooling. It is considered that the reduction in the anisotropy in KS Ti-9 subjected to this duplex heat treatment is associated with the difference in the orientation of the precipitated acicular α phase.

本文言語English
ページ(範囲)783-790
ページ数8
ジャーナルMaterials Transactions
54
5
DOI
出版ステータスPublished - 2013

ASJC Scopus subject areas

  • 材料科学(全般)
  • 凝縮系物理学
  • 材料力学
  • 機械工学

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