The Microstructure Stability of Precipitation Strengthened Medium to High Entropy Superalloys

Te Kang Tsao, An Chou Yeh*, Hideyuki Murakami

*この研究の対応する著者

研究成果: Article査読

25 被引用数 (Scopus)

抄録

Medium and high entropy superalloys based on the Ni-Co-Fe system with strengthening L12 γ′ precipitates have been developed. The present study has shown that by controlling the elemental partitioning between γ/γ′, thermal stability of γ′ can be enhanced in the high entropy γ matrix. Most importantly, high entropy superalloys exhibit stable γ–γ′ microstructures with no TCP phases after long-term exposure at elevated temperatures. Therefore, a new alloy design space for stable γ–γ′ microstructure has been presented. Furthermore, due to relatively high content of Fe and Ti, their raw materials cost and alloy density can potentially be lower than those of conventional superalloys.

本文言語English
ページ(範囲)2435-2442
ページ数8
ジャーナルMetallurgical and Materials Transactions A: Physical Metallurgy and Materials Science
48
5
DOI
出版ステータスPublished - 2017 5月 1
外部発表はい

ASJC Scopus subject areas

  • 凝縮系物理学
  • 材料力学
  • 金属および合金

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