Investigation on phase relationships and creep properties of Ir-Nb-X (X = Hf, Ta, or Ti) ternary alloys

Chen Huang, Y. Yamabe-Mitarai, S. Nakazawa, K. Nishida, H. Harada

Research output: Contribution to journalArticlepeer-review

5 Citations (Scopus)

Abstract

Previous studies have indicated that Ir-Nb-Zr ternary alloys exhibited better creep properties than Ir-Nb binary alloys. In this work, research on phase relationships and creep properties of Ir-Nb-X (X = Hf, Ta, and Ti) ternary alloys was carried out, from the phase constituent to the creep property. The fcc/L12 two-phase structure was detected in all the alloys. The phase relationship concentrating on the fcc and L12 phases at 2000 °C in the three ternary systems was established. Both fcc and L12 phases formed a continuous solid solution from the Ir-Nb side to the Ir-X (X = Hf, Ta, and Ti) side. The lattice misfit between the fcc and L12 phases was estimated; the Ir-Nb-Hf alloys showed the highest value, while the Ir-Nb-Ti alloys showed the smallest one. The creep properties at high temperature of some alloys were tested. Ir-Nb-Hf exhibited the strongest creep resistance among these three kinds of alloys.

Original languageEnglish
Pages (from-to)191-197
Number of pages7
JournalMaterials Science and Engineering A
Volume412
Issue number1-2
DOIs
Publication statusPublished - 2005 Dec 5
Externally publishedYes

Keywords

  • Creep property
  • High temperature
  • Ir-base ternary alloy
  • Lattice misfit
  • Phase relationship

ASJC Scopus subject areas

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

Fingerprint Dive into the research topics of 'Investigation on phase relationships and creep properties of Ir-Nb-X (X = Hf, Ta, or Ti) ternary alloys'. Together they form a unique fingerprint.

Cite this