Abstract:The present paper investigates creep crack growth behavior in Ni-base superalloys, i.e., Ni-26%Cr-17%W-0.5%Mo alloys, at 1,273K in a He gas environment. The alloys have been developed as candidate structural materials for heat exchangers in Japanese high-temperature gas-cooled reactors (HTGRs) and shown to have good creep resistance.Creep crack growth tests were made on the alloys having different carbon contents in a simulated HTGR He gas environment. Tests were also made in a low vacuum for a comparison purp… Show more
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