Creep strengths of a Ni-base single crystal superalloy TMS-82+ and its tie-line alloys

Yutaka Koizumi, Toshiharu Kobayashi, Tadaharu Yokokawa, Makoto Osawa, Hiroshi Harada, Takehisa Hino, Yomei Yoshioka

Research output: Contribution to journalArticlepeer-review

2 Citations (Scopus)

Abstract

The γ′ fraction dependence of the creep properties of the second generation single crystal (SC) Ni-base superalloy, TMS-82 +, and their γ/γ′ tie-line alloys is presented. The γ′ fraction is varied between 0 and 100%. The γ and γ′ phases of the alloys are designed to have the same chemical composition so that γ′ fraction dependence can be assessed independently. The γ single-phase alloy is weaker than the γ′ single-phase alloy. The best creep property is obtained with the γ′ fraction between 60 and 70%, depending on the creep condition. The optimum γ′ fraction decreases at higher temperature and lower stress. The SC alloys show larger γ′ fraction dependence compared with the conventionally cast polycrystalline alloys previously reported.

Original languageEnglish
Pages (from-to)205-208
Number of pages4
JournalNippon Kinzoku Gakkaishi/Journal of the Japan Institute of Metals
Volume67
Issue number4
DOIs
Publication statusPublished - 2003 Apr
Externally publishedYes

Keywords

  • Creep
  • Nickel-base superalloys
  • Single crystal
  • TMS-82+
  • γ phase
  • γ′ phase

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Mechanics of Materials
  • Metals and Alloys
  • Materials Chemistry

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