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.
|Number of pages||14|
|Journal||Diffusion and Defect Data. Pt A Defect and Diffusion Forum|
|Publication status||Published - 2001 Jan 1|
ASJC Scopus subject areas
- Materials Science(all)
- Condensed Matter Physics