- 쇼트피이닝 가공 스프링강의 압축잔류응력이 피로균열 진전거동에 미치는 영향
- ㆍ 저자명
- 박경동
- ㆍ 간행물명
- 한국자동차공학회논문집
- ㆍ 권/호정보
- 2003년|11권 4호|pp.117-124 (8 pages)
- ㆍ 발행정보
- 한국자동차공학회
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- 정기간행물| PDF텍스트
- ㆍ 주제분야
- 기타
The lightness of components required in automobile and machinery industry is requiring high strength of components. In particular, manufacturing process and new materials development for solving the fatigue fracture problem attendant upon high strength of suspension of automobile are actively advanced. In this paper, the effect of compressive residual stress of spring steel(JISG SUP-9) by shot-peening on fatigue crack growth characteristics in high temperatures($100^{circ}C$, $150^{circ}C$, $180^{circ}C$) was investigated with considering fracture mechanics. So, we can obtain followings. (1)Compressive residual stress decreases in high temperature, that is, with increasing temperature. (2)The effect of compressive residual stress on fatigue crack growth behavior in high temperature increases below $Delta$K=17~19MPa (3)It was investigated by SEM that the constraint of compressive residual stress for plastic zone of fatigue crack tip was decreased in high temperature as compared with room temperature.