Volume 35 Issue 1
Jan.  2020
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JIN Shengzhe, HU Dianyin, LIU Hui. Numerical simulation method and investigation of cold expansion processing parameters of nickel-based superalloy GH4169[J]. Journal of Aerospace Power, 2020, 35(1): 30-40. doi: 10.13224/j.cnki.jasp.2020.01.004
Citation: JIN Shengzhe, HU Dianyin, LIU Hui. Numerical simulation method and investigation of cold expansion processing parameters of nickel-based superalloy GH4169[J]. Journal of Aerospace Power, 2020, 35(1): 30-40. doi: 10.13224/j.cnki.jasp.2020.01.004

Numerical simulation method and investigation of cold expansion processing parameters of nickel-based superalloy GH4169

doi: 10.13224/j.cnki.jasp.2020.01.004
  • Received Date: 2019-06-10
  • Publish Date: 2020-01-28
  • In order to investigate the usage of cold expansion technology in nickel-based superalloy GH4169, the numerical simulation method was established to study the influence of mandrel materials, interference value and friction coefficient on circumferential residual stress distribution. The validity of the numerical method was verified by experimental data. According to the simulation results, the upper limit of interference value was 186% and there existed a favorable range of interference value and friction coefficient. In addition, the depth of compressive residual stress had a positive linear correlation with the interference value on both entrance and exit surfaces, while an optimal interference value existed. The choice of mandrel material should be based on yield strength and ultimate strength due to mandrel’s plastic deformation. The friction coefficient only affected the distribution of compressive residual stress on the edge of the hole. In case of insufficient lubrication, exit surface became a critical section resulting from material accumulation.

     

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