HEAT RESISTANT ALLOY MEMBER, METHOD FOR MANUFACTURING THE SAME, AND METHOD FOR REPAIRING THE SAME

摘要

A heat resistant alloy member that maintains the creep strength and improves the fatigue characteristics is provided. The heat resistant alloy member according to the present invention includes a recrystallized structure layer including finer grains on the surface of the member than those inside of the member. The recrystallized structure layer is formed by forming a stirred layer by giving processing strain to the surface of the member using a friction stir processing, and applying recrystallization heat treatment to the stirred layer for recrystallization.