Phase stability of nickel-base single crystal superalloys containing iridium substituting for ruthenium

Yuhi Mori, Tadaharu Yokokawa, Toshiharu Kobayashi, Hiroshi Harada, Shinsuke Suzuki

研究成果: Article査読

3 被引用数 (Scopus)

抄録

Phase stability of Ni-base single crystal superalloys was compared between Ir addition and Ru addition. Investigated alloys were TMS-238 and its derivative alloys. The thermodynamic equilibrium microstructures obtained by a strain aging showed that the volume fractions of γ, γ and topologically close packed (TCP) phases in the alloys were virtually the same to each other without depending on Ir substitution for Ru. On the other hand, the time temperature transformation diagrams obtained by an ordinary aging showed a significant delay in TCP precipitation in the alloys with Ir substitution. The delay in the TCP precipitation might be attributed to the smaller interdiffusion coefficient of Ir-Ni, compared with one of Ru-Ni. The smaller interdiffusion coefficient may affect the kinetics of the TCP precipitation.

本文言語English
ページ(範囲)1845-1848
ページ数4
ジャーナルMaterials Transactions
57
10
DOI
出版ステータスPublished - 2016

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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