Microstructures and fracture behaviours of Ir-Nb two-phase refractory superalloys containing various amounts of Nb, Ni, Mo, C and B

Y. F. Gu, Yoko Mitarai, Y. Ro, H. Harada

Research output: Contribution to journalConference articlepeer-review

2 Citations (Scopus)

Abstract

The effects of various Nb, Ni, Mo, B, and C content on the microstructures and deformation behaviours of Ir-Nb fcc-L12 two-phase refractory superalloys were investigated at both room and high temperatures. The results showed that the intergranular fracture occurring in Ir single-phase alloys could be governed by controlling the microstructures around GBs and alloying Ni, B and C in Ir-15at%Nb two-phase alloys. The results also showed that Ir-15at%Nb two-phase refractory superalloys alloyed with about 10at% Ni were superior to the binary Ir-15at%Nb two-phase alloy as an ultra-high temperature structural material in terms of strength, fracture behavior, and density.

Original languageEnglish
Pages (from-to)669-676
Number of pages8
JournalKey Engineering Materials
Volume171-174
Publication statusPublished - 2000 Jan 1
Externally publishedYes
EventProceedings of the 1999 8th International Conference on Creep and Fracture of Engineering Materials and Structures - Tsukuba, Jpn
Duration: 1999 Nov 11999 Nov 5

ASJC Scopus subject areas

  • Materials Science(all)
  • Mechanics of Materials
  • Mechanical Engineering

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