Compressive creep properties of Ir-base refractory superalloys

Y. Yamabe-Mitarai, H. Harada, Y. Gu, C. Huang

Research output: Contribution to journalArticlepeer-review

17 Citations (Scopus)


Ir-base alloys with the fcc and L12-Ir3X (X = Nb, Zr) two-phase structure have been developed as next-generation high-temperature materials. The compressive creep behavior of Ir-Nb and Ir-Zr alloys was investigated at 2073 K under 137 MPa. The effect of addition of the third element, Zr, on the creep behavior of an Ir-Nb alloy was also investigated ar 2073 K for 137 MPa. The creep rate became two orders lower by addition of a small amount of Zr. The lattice misfit change between the fcc and L12 two phase by addition of Zr and the deformation structure in binary and ternary alloys after a creep test were also investigated. The creep behavior is discussed in terms of the lattice misfit, precipitate shape, and their distribution.

Original languageEnglish
Pages (from-to)547-557
Number of pages11
JournalMetallurgical and Materials Transactions A: Physical Metallurgy and Materials Science
Issue number3
Publication statusPublished - 2005 Mar
Externally publishedYes

ASJC Scopus subject areas

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


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