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Volume 24 Issue 9
Sep.  2017
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文章导航 >  矿物冶金与材料学报（英文）  > 2017  >  24(9): 1004-1009
Yan Zeng, Peng-peng Zuo, Xiao-chun Wu, and Shu-wen Xia, Effects of mechanical strain amplitude on the isothermal fatigue behavior of H13, Int. J. Miner. Metall. Mater., 24(2017), No. 9, pp. 1004-1009. https://doi.org/10.1007/s12613-017-1489-z
Cite this article as:
Yan Zeng, Peng-peng Zuo, Xiao-chun Wu, and Shu-wen Xia, Effects of mechanical strain amplitude on the isothermal fatigue behavior of H13, Int. J. Miner. Metall. Mater., 24(2017), No. 9, pp. 1004-1009. https://doi.org/10.1007/s12613-017-1489-z
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研究论文

Effects of mechanical strain amplitude on the isothermal fatigue behavior of H13

  • School of Materials Science and Engineering, Shanghai University, Shanghai 200072, China

  • 通讯作者:

    Yan Zeng    E-mail: zy2002_2006@163.com

  • Isothermal fatigue (IF) tests were performed on H13 tool steel subjected to three different mechanical strain amplitudes at a constant temperature to determine the effects of mechanical strain amplitude on the microstructure of the steel samples. The samples' extent of damage after IF tests was compared by observation of their cracks and calculation of their damage parameters. Optical microscopy (OM) and scanning electron microscopy (SEM) were used to observe the microstructure of the samples. Cracks were observed to initiate at the surface because the strains and stresses there were the largest during thermal cycling. Mechanical strain accelerated the damage and softening of the steel. A larger mechanical strain caused greater deformation of the steel, which made the precipitated carbides easier to gather and grow along the deformation direction, possibly resulting in softening of the material or the initiation of cracks.
    • Research Article

    Effects of mechanical strain amplitude on the isothermal fatigue behavior of H13

    + Author Affiliations
      Abstract
    • Isothermal fatigue (IF) tests were performed on H13 tool steel subjected to three different mechanical strain amplitudes at a constant temperature to determine the effects of mechanical strain amplitude on the microstructure of the steel samples. The samples' extent of damage after IF tests was compared by observation of their cracks and calculation of their damage parameters. Optical microscopy (OM) and scanning electron microscopy (SEM) were used to observe the microstructure of the samples. Cracks were observed to initiate at the surface because the strains and stresses there were the largest during thermal cycling. Mechanical strain accelerated the damage and softening of the steel. A larger mechanical strain caused greater deformation of the steel, which made the precipitated carbides easier to gather and grow along the deformation direction, possibly resulting in softening of the material or the initiation of cracks.
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