Volume 36 Issue 12
Dec.  2021
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Article Navigation >  Journal of Aerospace Power  > 2021  >  36(12): 2515-2523
XU Yufei, HU Dianyin, MI Dong, PAN Jinchao, WANG Rongqiao. Numerical simulation of small crack growth in selective laser melting TC4[J]. Journal of Aerospace Power, 2021, 36(12): 2515-2523. doi: 10.13224/j.cnki.jasp.20210043
Citation: XU Yufei, HU Dianyin, MI Dong, PAN Jinchao, WANG Rongqiao. Numerical simulation of small crack growth in selective laser melting TC4[J]. Journal of Aerospace Power, 2021, 36(12): 2515-2523. doi: 10.13224/j.cnki.jasp.20210043
shu

Numerical simulation of small crack growth in selective laser melting TC4

doi: 10.13224/j.cnki.jasp.20210043
  • 1.

    Research Institute of Aero-Engine， Beijing University of Aeronautics and Astronautics，Beijing 100191，China

  • 2.

    Beijing Key Laboratory of Aero-Engine Structure and Strength， Beijing University of Aeronautics and Astronautics，Beijing 100191，China

  • 3.

    Hunan Aviation Powerplant Research Institute， Aero Engine Corporation of China，Zhuzhou Hunan 412002，China

  • 4.

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

  • Received Date: 2021-01-27
  • Publish Date: 2021-12-28
    Abstract
  • A numerical simulation method of small crack growth in selective laser melting （SLM） titanium alloy TC4 considering microstructure was developed.Based on the microstructure observation results of SLM TC4，the microstructure modeling was realized by Voronoi diagram and crystallographic orientation screening.The extended finite element method was used to establish the simulation method for small crack growth behavior of SLM TC4 to explore the influences of buildup direction，grain size，crystallographic orientation and other microstructure on the small crack growth rate.The buildup direction affected the crack growth resistance，and the material had better resistance to fatigue small crack growth when the buildup direction was parallel to the crack growth direction.The grain size affected the small crack growth rate，the growth rate of small crack became faster with the increase of grain size.The crystallographic orientation affected the volatility of the crack growth rate，the upper and lower bounds of small crack growth rate of materials with different crystallographic orientations were obviously different.

     

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