Journal of the Korean Society for Precision Engineering (한국정밀공학회지)

Korean Society for Precision Engineering (한국정밀공학회)
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Low Cycle Fatigue Life Prediction of HSLA Steel Using Total Strain Energy Density

전변형률 에너지밀도를 이용한 고강도 저 합금강의 저주기 피로수명 예측

  • Kim, Jae-Hoon (Dept. of Mechanical Design Engineering, Chungnam National University) ;
  • Kim, Duck-Hoi (Dept. of Mechanical Design Engineering, Graduate School of Chungnam National University)
  • 김재훈 (충남대학교 기계설계공학과) ;
  • 김덕희 (충남대학교 대학원 기계설계공학과)
  • Published : 2002.06.01
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Abstract

Low cycle fatigue tests are performed on the HSLA steel that be developed for a submarine material. The relation between strain energy density and numbers of cycles to failure is examined in order to predict the low cycle fatigue life of HSLA steel. The cyclic properties are determined by a least square fit techniques. The life predicted by the strain energy method is found to coincide with experimental data and results obtained from the Coffin-Manson method. Also the cyclic behavior of HSLA steel is characterized by cyclic softening with increasing number of cycle at room temperature. Especially, low cycle fatigue characteristics and microstructural changes of HSLA steel are investigated according to changing tempering temperatures. In the case of HSLA steel, the $\varepsilon$-Cu is farmed in $550^{\circ}C$ of tempering temperature and enhances the low cycle fatigue properties.

Keywords

References

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