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<p>The characteristics of the powders after different printing cycles were comprehensively analyzed in order to figure out the relationship between the powder and the printed alloy. This paper intended to test the powder properties together with the porosity, surface morphology and tensile properties of GH3536 nickel-based superalloy printed with virgin powder and powders at the 8th and 16th time reuse cycle (referred to as powders after 0, 8 and 16 cycles, respectively). The results displayed that as the reuse cycle number increased, the particle size experienced slight changes, while the proportion of hollow particles remained the same. It is worth noting that many irregular pores were found in the hollow particles and the nitrogen and oxygen contents were seen marked variations. Satellite particles existed in all the three cycle powders, ruptured particles, remelted particles, and irregularly-shaped particles were observed in the powders after 8 cycles and 16 cycles. In terms of tensile properties, with the increase of the powder cycles, the strength tends to decrease, while the plasticity tends to increase. For all the cases, the superalloy exhibited transcrystalline plastic fracture at room temperature. The results provide a reference for powder reuse and mechanical properties of L-PBF GH3536 alloy.</p>

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Effect of Powder Reuse on Powder Properties and Mechanical Properties of GH3536 Alloy during Laser Powder Bed Fusion

  • 期刊论文

  • 发表日期：

    2025年9月24日

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  • Yao Wang,
  • Shouzhen Zhou,
  • Junchao Zheng,
  • Xiaona Ren,
  • Xinggang Li,
  • Fengyu Lv,
  • Weifeng Qi,
  • Wenchang Wang,
  • Wenxing Huo,
  • Zhipei Chen,
  • Changchun Ge

摘要

The characteristics of the powders after different printing cycles were comprehensively analyzed in order to figure out the relationship between the powder and the printed alloy. This paper intended to test the powder properties together with the porosity, surface morphology and tensile properties of GH3536 nickel-based superalloy printed with virgin powder and powders at the 8th and 16th time reuse cycle (referred to as powders after 0, 8 and 16 cycles, respectively). The results displayed that as the reuse cycle number increased, the particle size experienced slight changes, while the proportion of hollow particles remained the same. It is worth noting that many irregular pores were found in the hollow particles and the nitrogen and oxygen contents were seen marked variations. Satellite particles existed in all the three cycle powders, ruptured particles, remelted particles, and irregularly-shaped particles were observed in the powders after 8 cycles and 16 cycles. In terms of tensile properties, with the increase of the powder cycles, the strength tends to decrease, while the plasticity tends to increase. For all the cases, the superalloy exhibited transcrystalline plastic fracture at room temperature. The results provide a reference for powder reuse and mechanical properties of L-PBF GH3536 alloy.