Transactions of the Korean Society of Automotive Engineers (한국자동차공학회논문집)

The Korean Society of Automotive Engineers (한국자동차공학회)
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An Evaluation on Corrosion Fatigue life of Spring Steel by Compressive Residual Stress

압축잔류응력을 부여한 스프링강의 부식피로 수명평가

  • Park, Keyung-Dong (Department of mechanical Engineering, Pukyoung National University) ;
  • Ki, Woo-Tae (Department of mechanical Engineering, Pukyoung National University) ;
  • Sin, Yeong-Jin (Department of mechanical Engineering, Pukyoung National University)
  • 박경동 (부경대학교 기계공학부) ;
  • 기우태 (부경대학교 기계공학부) ;
  • 신영진 (부경대학교 기계공학부)
  • Published : 2007.01.01
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Abstract

In this study, the influence of compressive residual stress and corrosive condition for corrosion fatigue crack was investigated, after immersing in 3.5%NaCl, $10%HNO_3+3%HF,\;6%FeCl_3$. The immersion period was performed for 90days. The fatigue characterization of a spring steel with processed shot peening were performed by considering the several corrosion environments in the range of stress ratio of 0.05 by means of opening mode displacement. By using the methods mentioned above, the following conclusions have been drawn: The fatigue life shows more improvement in the shot peened material than that in the un peened material. And the fatigue life shows improvement in ambient than in corrosion conditions. Threshold stress intensity factor range of the shot peened materials has higher than of the un peened materials. And the threshold stress intensity factor range was decreased in corrosion environments over ambient.

Keywords

References

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