Journal of the Korean Society for Heat Treatment (열처리공학회지)

The Korean Society for Heat Treatment (한국열처리공학회)
권호 표지

A Study on Fatigue Characteristic of Connecting Rod Material for Automobile

자동차용 커넥팅로드 소재의 피로특성에 관한 연구

  • Kim, Hyun-Soo (Dept. of Nano System & Process Engineering, Pusan National University) ;
  • Park, In-Duck (Industry & Technology Div., Busan Metropolitan City Hall) ;
  • Kim, Chang-Hoon (Korea Materials & Components Industry Agency) ;
  • Kim, Tae-Gyu (Dept. of Nano System & Process Engineering, Pusan National University)
  • 김현수 (부산대학교 나노시스템공정공학과) ;
  • 박인덕 (부산시청 공업과) ;
  • 김창훈 (한국부품소재산업진흥원) ;
  • 김태규 (부산대학교 나노시스템공정공학과)
  • Received : 2006.05.01
  • Accepted : 2006.05.25
  • Published : 2006.05.30
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Abstract

Fretting is a kind of surface degradation mechanism observed in mechanical components and structures. The fretting damage decreases into 50-70% of the plain fatigue strength. The connecting rod for automobile has been used in special environments and various loading conditions. Failure of connecting rod in automotive engine may cause catastrophic situation. In this study, we investigated the fatigue characteristic of connecting rod material for an automobile. Fatigue life is defined as the number of cyclic stress to failure by regular cyclic stress. Fatigue life of C70S6 specimen was obtained from 134,000 to 147,000 cycles. Fatigue limit showed 432MPa by normal fatigue test. The other hands, it was 96MPa in the case of fretting fatigue test. It was extremely lower than that of a normal fatigue test. From observation of fracture surface, it was confirmed that the fatigue crack was initiated at the boundary of a specimen and bridge pad.

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References

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