Fracture characteristics of bimodal microstructure in Ti-4.5Al-3V-2Mo-2Fe

Gunawarman, Mitsuo Niinomi, Kei Ichi Fukunaga, Daniel Eylon, Shiro Fujishiro, Chiaki Ouchi

研究成果: Article査読

1 被引用数 (Scopus)

抄録

Fracture characteristics of the bimodal microstructure in β-rich α+β alloy, Ti-4.5Al-3V-2Mo-2Fe, were studied. The bimodal microstructure was varied by changing annealing temperatures and cooling rates from the annealing temperatures. Annealing temperatures were varied between 1103 K and 1173 K in α+β field for 3.6 ks. While cooling rates were varied from rapid to slow cooling; namely water quenching, air-cooling, furnace cooling and slow furnace cooling. Results of study reveal that the fracture toughness (JIC) of the alloy increases with increasing annealing temperature for the given cooling rates except for air-cooling treatment. Relatively high fracture toughness is given by furnace cooling treatment with a cooling rate around 0.1 Ks-1. However, the fracture toughness decreases significantly in slow furnace cooling specimens with a cooling rate around 0.05 Ks-1. The microstructural factors dominating fracture toughness will be discussed.

本文言語English
ページ(範囲)775-780
ページ数6
ジャーナルInternational Journal of Materials and Product Technology
SPEC ISS. VOL.2
出版ステータスPublished - 2001
外部発表はい

ASJC Scopus subject areas

  • Safety, Risk, Reliability and Quality
  • Mechanics of Materials
  • Mechanical Engineering
  • Industrial and Manufacturing Engineering

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