Dislocation structure in precipitation-hardened Ir-based binary alloys

Y. Yamabe-Mitarai, Y. Ro, S. Nakazawa, T. Maruko, H. Harada

Research output: Contribution to journalArticlepeer-review

10 Citations (Scopus)


This paper examines the microstructure and the strength behavior up to 1800 °C of Ir-V, -Ti, -Nb, -Ta, -Hf, and -Zr alloys which formed fcc and L12 two-phase coherent structures. It is indicated that the precipitation-hardening effect depends on microstructure, resulting from differences in the lattice misfit. A maze structure such as in the Ir-Zr alloy was more effective for precipitation hardening than an orderly arrayed structure such as in the Ir-Nb alloy. The dislocation structure of deformed samples was investigated by TEM. The deformation mechanism of the alloys with different microstructures was discussed.

Original languageEnglish
Pages (from-to)171-184
Number of pages14
JournalDiffusion and Defect Data. Pt A Defect and Diffusion Forum
Publication statusPublished - 2001

ASJC Scopus subject areas

  • Radiation
  • Materials Science(all)
  • Condensed Matter Physics


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