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서브제로 온도 및 시간이 다른 STS316L의 탄성파 특성
이금화,구경희,탁영준,권영국,신기항,남기우,Lee, Gum-Hwa,Gu, Kyoung-Hee,Tak, Young-Joon,Kwon, Yung-Kug,Shin, Ki-Hang,Nam, Ki-Woo 한국산업융합학회 2022 한국산업융합학회 논문집 Vol.25 No.5
In this study, STS316L rolled at five rolling degrees were treated with two types of subzero temperatures for 10, 30, and 60 minutes, respectively, and the dominant frequencies of elastic waves was investigated. The dominant frequency was higher as the subzero temperature was lower and the subzero treatment time was longer at each rolling degree. On the other hand, the dominant frequency was higher as the elongation decreased. In the time-frequency analysis for subzero temperature and time of the specimen with a rolling degree of 33%, the dominant frequency was higher at a subzero temperature of -196℃ than -50℃ regardless of subzero treatment time.