Kinetics of α′-Phase Growth and Coagulation under Thermal Aging of Fe-22% Cr Alloy

摘要

Considered in the article, α′-phase growth and coagulation stages under 500℃ thermal aging of Fe-22% Cr binary alloy have been investigated on the atomic scale level, with atom probe tomography being applied, α′-phase appearing precipitates are shown to be separated in space. In addition, after 100-hour thermal aging the nucleation stage evolves into the growth and coagulation stage of α'-phase precipitates, with their number density being decreased simultaneously. Deviation of time dependences from Lifshitz-Slezov theory is revealed in Fe-22% Cr supersaturated solid solution alloy.