Development of quaternary Ir-Ta-Ni-Al refractory superalloys

Xihong Yu, Yoko Yamabe-Mitarai, Yoshikazu Ro, Yuefeng Gu, Hiroshi Harada

Research output: Contribution to journalArticlepeer-review

7 Citations (Scopus)


The microstructure and compressive properties of quaternary refractory superalloys from two binary alloys which were composed of face centered cubic (fcc)/L12 coherent structures were examined. Ir-Ta and Ni-Al alloys were mixed in different proportions to form a quaternary superalloys. A three-phase equilibrium exists in the alloys including 25% and 75% Ir-based alloys, consisting of two kinds of L12 (Ir3Ta and Ni3Al types) and fcc structure. A four-phase equilibrium exists in the alloy including 50% Ir-based alloy after heated at 1300 °C for 168 hours consisting of two kinds of L12, fcc, and B2 structures. At 1200 °C, these alloys exhibited higher yield stress and compressive strains than that of Ni-based superalloys during the compressive tests.

Original languageEnglish
Pages (from-to)651-657
Number of pages7
JournalScripta Materialia
Issue number6
Publication statusPublished - 1999 Aug 20
Externally publishedYes

ASJC Scopus subject areas

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


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