Chinese Journal of Lasers, Volume. 46, Issue 5, 0502003(2019)

Effects of Bulk Laser Energy Density on Anisotropy of Selective Laser Sintered 316L Stainless Steel

Xuewen Zong1、*, Qian Gao1, Hongzhi Zhou2, Jialiang Zhang1, and Tengbo Qi2
Author Affiliations
  • 1College of Mechanical Engineering, Xi'an University of Science and Technology, Xi'an, Shaanxi 710054, China
  • 2Suzhou Zhongrui Zhichuang 3D Technology Co., Ltd., Suzhou, Jiangsu 215223, China
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    Figures & Tables(11)
    Schematic of growth direction
    Schematic of sample size
    Surface weld pool morphology of 316L stainless steel obtained at different bulk laser energy densities. (a) 40.48 J·mm-3; (b) 42.42 J·mm-3; (c) 55.56 J·mm-3; (d) 64.40 J·mm-3; (e) 72.92 J·mm-3; (f) 75.76 J·mm-3; (g) 79.37 J·mm-3; (h) 83.33 J·mm-3; (i) 118.06 J·mm-3
    Scatter plot of bulk laser energy density versus tensile strength
    Scatter plot of bulk laser energy density versus percentage elongation after fracture
    Microstructures of x-direction and y-direction formed samples at different bulk laser energy densities. (a) 83.33 J·mm-3; (b) 64.40 J·mm-3; (c) 40.48 J·mm-3
    Microstructures of z-direction formed sample at different bulk laser energy densities. (a) 83.33 J·mm-3; (b) 64.40 J·mm-3; (c) 40.48 J·mm-3
    • Table 1. Powder characteristics

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      Table 1. Powder characteristics

      D10 /μmD50 /μmD90 /μmTap density /(g·cm-3)Apparent density /(g·cm-3)CompressionlimitFlowability /s
      26.5136.1752.474.764.0016Hall:17.03 Carney:3.79
    • Table 2. Main chemical composition of 316L stainless steel

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      Table 2. Main chemical composition of 316L stainless steel

      ElementOCCrMoSiFeMnNiSP
      Mass fraction /%0.04510.009517.922.420.52Bal.0.05112.040.0104-
    • Table 3. Four-factor-three-level orthogonal test

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      Table 3. Four-factor-three-level orthogonal test

      LevelFactor
      Laserpower /WScanspeed /(mm·s-1)Scanspacing /mmGrowthdirection
      12008000.06z
      217011000.08y
      314014000.10x
    • Table 4. Arrangement and results of orthogonal test

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      Table 4. Arrangement and results of orthogonal test

      TrialnumberLaserpower /WScan speed /(mm·s-1)Scanspacing /mmTensile strength /MPa
      x directiony directionz direction
      12008000.10755.00717.67637.03
      220011000.08740.11713.23642.30
      320014000.06729.34707.22632.84
      41708000.06698.02702.35621.01
      517011000.08711.62730.43652.61
      617014000.10611.43619.95552.26
      71408000.08726.23732.45659.87
      814011000.10617.40631.23553.40
      914014000.06701.02704.44634.94
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    Xuewen Zong, Qian Gao, Hongzhi Zhou, Jialiang Zhang, Tengbo Qi. Effects of Bulk Laser Energy Density on Anisotropy of Selective Laser Sintered 316L Stainless Steel[J]. Chinese Journal of Lasers, 2019, 46(5): 0502003

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    Paper Information

    Category: laser manufacturing

    Received: Nov. 20, 2018

    Accepted: Feb. 18, 2019

    Published Online: Nov. 11, 2019

    The Author Email: Xuewen Zong (921786797@qq.com)

    DOI:10.3788/CJL201946.0502003

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