및 강도평가
The CF8M is observed a britt1e behavior in the range of 475'C. The five c1asses of the thermally aged CF8M specimen are prepared using an artificially accelerated aging method. Namely, after the specimen are held for 100, 300, 900, 1800, and 36oohrs. at 430.C respectively, the specimen are water cooled to room temperature. In ...