304 스테인리스강 주조재의 저온 S-N 피로거동 예측

• Published in: 대한금속·재료학회지, 49(10) Vol. 49; no. 10; pp. 774 - 779
• Main Authors: 권재기, Jae Ki Kwon, 이현정, Hyun Jung Lee, 김영주, Young Ju Kim, 김상식, Sang Shik Kim
• Format: Journal Article
• Language: Korean
• Published: 대한금속재료학회 20.10.2011; 대한금속·재료학회
• Subjects: cast 304 stainless steel; cryogenic temperatures; S-N fatigue; 재료공학
• ISSN: 1738-8228; 2288-8241

S-N fatigue behavior of cast 304 stainless steel was studied at 25, -50 and -196℃ and at a stress ratio of -1 in uniaxial and bending loading condition. It was found that the resistance to S-N fatigue was greatly improved with decreasing testing temperature. The normalized S-N fatigue curves by tensile strength at three different testing temperatures matched each other, suggesting that tensile strength determines the S-N fatigue resistance of cast 304 stainless steel at low temperatures. The effectsof different loading on the resistance to S-N fatigue of cast 304 stainless steel were quantified. The S-N fatigue curves at 25, -50 and -196℃ were described by using Basquin`s law the relationship between the S-N fatigue curve and the testing temperature was obtained by using a simple regression method.