Fe 基超耐熱合金 V57 における中間時効処理条件のη相および機械的性質におよぼす影響

概要

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Effects of the intermediate aging condition on the cellular precipitation of η phase at grain boundary and mechanical properties of an iron base super alloy, V 57 have been investigated and the relationship between the amount of η phase and mechanical properties has been discussed. η phase increases with the increase of intermediate aging temperature and time, and decreases with raising preheating temperature before the intermediate aging because of γ' precipitation during preheating. Grain boundary η phase has little effect on tensile strength at room temperature. The increase of grain boundary η phase causes slight decrease of tensile elongation at room temperature, remarkable decrease of stress rupture life and also remarkable increase of stress rupture elongation.
社団法人日本鉄鋼協会の論文
1970-11-01