Creep behavior of Ir-Nb and Ir-Zr alloys

Y. Yamabe-Mitarai, S. Nakazawa, H. Harada

Research output: Contribution to journalArticlepeer-review

29 Citations (Scopus)

Abstract

The compression strength behavior and deformation mechanism of Ir-based refractory superalloys was investigated. The microstructure and strength behavior of Ir-Nb and Ir-Zr alloys were also investigated, which demonstrated that the precipitation hardening of the Ir-Zr alloy is higher than that of the Ir-Nb alloy. In the Ir-Zr alloy, a semi-coherent structure with misfit dislocations at the interface also exists in addition to the coherent structure. The precipitate shape difference is attributed to the lattice misfit between the fcc matrix and the L12 precipitates. It is also shown that the deformation of the Ir-Zr alloy progresses as a result of precipitates shearing. The deformation mode of the Ir-Nb alloy is suggested as being a bypassing mechanism.

Original languageEnglish
Pages (from-to)1059-1064
Number of pages6
JournalScripta Materialia
Volume43
Issue number12
DOIs
Publication statusPublished - 2000 Nov 27
Externally publishedYes

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering
  • Metals and Alloys

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