Journal of the Korean Society for Heat Treatment (열처리공학회지)

The Korean Society for Heat Treatment (한국열처리공학회)
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Characteristics of STS 304 Rolled Steel by High Temperature Low Cycle Fatigue

고온 저주기 피로에 의한 STS 304 압연강재의 특성연구

  • Kim, C.H. (Department of Nano Fusion Technology, Pusan National University) ;
  • Park, Y.M. (Department of Nano Fusion Technology, Pusan National University) ;
  • Bae, M.K. (Department of Nano Fusion Technology, Pusan National University) ;
  • Shin, D.C. (Department of Mechanical Engineering, Koje College) ;
  • Kim, D.W. (Division of Intelligent Vehicle, Silla University) ;
  • Kim, T.G. (Department of Nanomechatronics Engineering, Pusan National University)
  • 김치환 (부산대학교 나노융합기술학과) ;
  • 박영민 (부산대학교 나노융합기술학과) ;
  • 배문기 (부산대학교 나노융합기술학과) ;
  • 신동철 (거제대학교 기계공학과) ;
  • 김대원 (신라대학교 지능형자동차공학부) ;
  • 김태규 (부산대학교 나노메카트로닉스공학과)
  • Received : 2019.01.07
  • Accepted : 2019.01.24
  • Published : 2019.01.31
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Abstract

In this study, strain-controlled low cycle fatigue test for hot rolled STS304 steel was carried out at $400^{\circ}C$ and $600^{\circ}C$, respectively. High temperature fatigue test was done using an electric furnace attached on the hydraulic fatigue test machine. The results of this study show that STS304 hot rolled steel has excellent static strength and fatigue characteristics. The hysteresis loop at half life was obtained in order to calculate the elastic and plastic strain. Also, Relationship between strain amplitude and fatigue life was examined in order to predict the low cycle fatigue life of STS304 steel by Coffin-Manson equation.

Keywords

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Fig. 1. Dimension of the specimen (unit : mm).

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Fig. 2. Hysteresis loop with total strain at ε=0.6%.

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Fig. 3. Hysteresis loop with total strain at ε=0.8%.

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Fig. 4. Hysteresis loop with total strain at ε=1.0%.

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Fig. 5. Strain-life curves of STS 304 at 600°C.

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Fig. 6. Strain-life curves of STS 304 at room tem-perature.

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Fig. 7. Strain-life curves of STS 304 at 400°C.

Table 1. Chemical composition of STS 304 steel

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Table 2. Low cycle fatigue test conditions of STS 304 steel

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Table 3. Low cycle fatigue test data at room temperature

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Table 4. Low cycle fatigue test data at 400°C

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Table 5. Low cycle fatigue test data at 600°C

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References

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