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.
|ジャーナル||Diffusion and Defect Data. Pt A Defect and Diffusion Forum|
|出版ステータス||Published - 2001|
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