Volume 36 Issue 10
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Article Navigation >  Journal of Aerospace Power  > 2021  >  36(10): 2139-2148
SUI Tianxiao, SHI Duoqi, WANG Xiangping, DU Wei, YANG Xiaoguang. Orientation-dependent low-cycle fatigue life evaluation method for single crystal superalloys[J]. Journal of Aerospace Power, 2021, 36(10): 2139-2148. doi: 10.13224/j.cnki.jasp.20200521
Citation: SUI Tianxiao, SHI Duoqi, WANG Xiangping, DU Wei, YANG Xiaoguang. Orientation-dependent low-cycle fatigue life evaluation method for single crystal superalloys[J]. Journal of Aerospace Power, 2021, 36(10): 2139-2148. doi: 10.13224/j.cnki.jasp.20200521
shu

Orientation-dependent low-cycle fatigue life evaluation method for single crystal superalloys

doi: 10.13224/j.cnki.jasp.20200521
  • 1.

    School of Energy and Power Engineering，Beijing University of Aeronautics and Astronautics，Beijing 100191，China

  • 2.

    Shenyang Engine Research Institute，Aero Engine Corporation of China，Shenyang 110015，China

  • 3.

    Beijing Aerospace Technology Institute，China Aerospace Science and Industry Corporation Limited，Beijing 100074，China

  • Received Date: 2020-12-04
  • Publish Date: 2021-10-28
    Abstract
  • In order to investigate the anisotropy of low-cycle fatigue （LCF） properties of single crystal （SC） superalloys，the LCF experimental data of SC7-14-6，DD3，PWA1480，Rene N4 and DD6 were collected from literatures.The calculation method of elastic modulus of SC superalloys was verified.The elastic modulus of different orientations was introduced to modify the total strain amplitude.A simple expression of LCF damage parameter was proposed，which was suitable for different crystallographic orientations of single crystal superalloys.Furthermore，an orientation-dependent LCF life evaluation method was formed.The experimental data of the above five alloys were used to validate this method.The results showed that：the elastic modulus was an important factor influencing the anisotropy of SC superalloys' LCF performance；the elastic modulus conversion method among different orientations in literature was reliable；most prediction results of the proposed method were within a factor of two.The proposed method is quite simple and effective，and it is suitable for engineering applications.

     

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