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압축잔류응력이 차량용 스프링강(SUP-9)의 파괴인성에 미치는 영향
박원조(WonJo Park),김추용(ChoYong Kim),허선철(SunChul Huh),이광영(KwangYoung Lee) 한국자동차공학회 2004 한국자동차공학회 춘 추계 학술대회 논문집 Vol.- No.-
Recently, many components used in machinery industry demand lightness and high strength. The shot-peening method is used in order to improve fatigue life of spring steel(SUP-9) which is used in suspension of automobile. The compressive residual is induced in shot-peening process. This paper investigated the effect of the compressive residual stress on the fracture toughness. The test of Fracture toughness had been conducted at room temperature, high temperature(100℃, 200℃) and low temperature(-60℃, -100℃) from SUP-9 Steel was process by shot-peening. so we survey fractography of SUP-9 Steel by SEM.