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<p>In selective laser melting (SLM), adjacent track overlap is crucial for quality. This study investigates the effect of hatch spacing on melt pool thermodynamics. Results show that both small and large hatch spacings harm densification—small spacing causes surface fluctuations, while large spacing results in un-melted porosity. At 300&#xa0;W power and 1800&#xa0;mm/s speed, a hatch spacing of 80&#xa0;<i>μ</i>m maximizes AlSi10Mg density. Validated by experiments, the multiphysics model provides valuable insights for metal SLM processing.</p>

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Hatch Spacing’s Thermodynamic Impact on AlSi10Mg Alloys in Selective Laser Melting: An Integrated Study

  • 期刊论文

  • 发表日期：

    2025年3月14日

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  • Xiaonan Ni,
  • Yanxun Liang,
  • Zijian Hu,
  • Wenxin Yang,
  • Ansen Wang,
  • Xin Deng,
  • Hongwei Wang,
  • Shanghua Wu,
  • Guanglin Nie

摘要

In selective laser melting (SLM), adjacent track overlap is crucial for quality. This study investigates the effect of hatch spacing on melt pool thermodynamics. Results show that both small and large hatch spacings harm densification—small spacing causes surface fluctuations, while large spacing results in un-melted porosity. At 300 W power and 1800 mm/s speed, a hatch spacing of 80 μm maximizes AlSi10Mg density. Validated by experiments, the multiphysics model provides valuable insights for metal SLM processing.