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논문 기본 정보

자료유형
학술저널
저자정보
Hyunho Yeom (Ajou Univ.) Moon Gu Lee (Ajou Univ.) Choon Man Lee (Changwon National Univ.) Yongho Jeon (Ajou Univ.)
저널정보
Korean Society for Precision Engineering Journal of the Korean Society for Precision Engineering 한국정밀공학회지 Vol.30 No.8
발행연도
2013.8
수록면
779 - 784 (6page)

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초록· 키워드

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Increased efficiency and improved performance associated with light-weight materials were investigated in this study. Numerous studies have investigated surface treatments to improve the fatigue strength of metals. Laser heat treatment is a promising method because the power and spot size can be easily controlled, allowing a small heat affected zone (HAZ). However, changes in the material properties can result; in particular, the material can become more brittle. In this study, a combination of laser heat treatment and vibration peening was proposed to increase fatigue strength without changing the material characteristics. SCM440H was investigated experimentally, and specimens were tested using a giga-cycle ultrasonic fatigue tester. The results show that the combination of these two processes significantly increased the fatigue strength and, furthermore, different fracture types were observed after a small and large number of cycles.

목차

1. Introduction
2. Experiments
3. Results
4. Conclusion
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