Creep behavior of Ir-Nb-Ni two-phase refractory superalloy

G. U. Yuefeng, Yamabe Mitarai Yoko, Nakazawa Shizuo, Harada Hiroshi

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)


The compression properties and creep behaviors of the Ni added Ir 85Nb 15 alloys were investigated by compression tests in air and vacuum. X-ray diffraction, transmission microscopy and scanning electron microscopy were conducted to characterize the microstructure and lattice misfit change by the addition of Ni in Ir 85Nb 15 alloy. The results reveal that Ni addition can improve the yield strength of Ir 85Nb 15 alloy at room temperatures. 1 atomic percent Ni addition can raise creep resistance of Ir 85Nb 15 alloy two orders of magnitude. Basing on the results, the relationship among the Ni addition, the lattice misfit, microstructure development, and the creep behavior in Ni added Ir 85Nb 15 alloys is discussed in this paper.

Original languageEnglish
Pages (from-to)8-13
Number of pages6
JournalJSME International Journal, Series A: Solid Mechanics and Material Engineering
Issue number1
Publication statusPublished - 2002 Jan
Externally publishedYes


  • Creep
  • Ir-Nb-Ni
  • Microstructure
  • Refractory superalloy

ASJC Scopus subject areas

  • Materials Science(all)
  • Mechanical Engineering


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