STS 304 강의 저주기 및 고주기 피로에 있어 초기 마르텐사이트의 영향

• 영문명: The Effect of Initial α’ on Low and High Cycle Fatigue Behavior of STS 304 Stainless Steel
• 발행기관: 강원대학교 산업기술연구소
• 저자명: 이현승(Lee Hyun Seung) 신형주(Sin Hyung Ju) 김송희(Kim Song Hee)
• 간행물 정보: 『산업기술연구』vol.21, 331~339쪽, 전체 9쪽
• 주제분류: 공학 > 공학일반
• 파일형태: PDF
• 발행일자: 2001.09.30

영문 초록

Zero to tension fatigue tests and strain controlled fatigue tests were carried out to find how initial strain induced martensite, α’ affects low and high cycle fatigue behavior and fatigue crack growth mechanisms. Microscopic study and phase analysis were carried out with TEM, SEM, EDAX, Optical Microscope, Ferriscope, and X-ray diffractometry. The amount of Initial α’ was controlled from 0% to 33% by controlling the temperatures for cold working and heat treatment. Lower contents of initial α’ showed higher fatigue resistance in low cycle fatigue but lower fatigue resistance in high cycle fatigue because it is ascribed to the more transformation of α’ martensite during low cycle fatigue and higher ductility. In high cycle fatigue, fatigue life is attributed to the strength and phase transformation of austenite into α’ during fatigue was negligible. γ boundary, γ/twin boundary, and γ/α’ boundary were found to be the preferred site of fatigue crack initiation.

목차

Abstract

1. 서론

2. 실험방법

3. 실험결과 및 고찰

4. 결론

참고문헌

키워드

304 스테인레스 강 피로성질 변형유기 마르텐사이트 304 stainless steel fatigue properties strain induced martensite