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Effect of Re addition on microstructure and mechanical properties of Ni base dual-two phase intermetallic alloys

  • S. Ishii (a1), T. Moronaga (a2), Y. Kaneno (a1), H. Tsuda (a1) and T. Takasugi (a1)...

Abstract

The effect of Re addition on microstructure and hardness of the Ni3Al (L12) and Ni3V (D022) dual two-phase intermetallic alloys was investigated as functions of alloying (substituting) method of Re and aging condition (temperature and time). Re was added to the base alloy composition by three methods: Re was substituted for Ni, Al and V, respectively. The Re-added alloys were solution-treated at 1553 K and then aged at lower temperatures of 1123 K-1248 K. Apparent age hardening occurred in the alloy where Re was substituted for Ni while no age hardening was observed in the alloys where Re was substituted for Al or V. In the case of the latter two alloys, the hardness was unchanged or reduced with a progression of aging time. These results were discussed in terms of phase separation and ordering in the channel region, and hardening due to Re-rich phase precipitation.

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Keywords

Effect of Re addition on microstructure and mechanical properties of Ni base dual-two phase intermetallic alloys

  • S. Ishii (a1), T. Moronaga (a2), Y. Kaneno (a1), H. Tsuda (a1) and T. Takasugi (a1)...

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