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<p>The advancement of additive manufacturing (AM) and the extensive implementation of laser powder bed fusion (LPBF) in high-performance industries necessitates the assurance of product quality. The quality of finished products and their properties is contingent upon the LPBF system, material, and the technological parameters of the process. Single tracks are the basic elements for LPBF parts, their combination creates a single layer, and a 3D object is built from a sequence of layers. To produce quality LPBF objects from powder metal material, it is necessary to use optimal parameters of the LPBF process, in which the single tracks remain continuous, and the process is stable. Stability can be achieved by determining the relationships between key physical quantities of the LPBF process. This paper presents a re-evaluation of the influence of some of the main process parameters on the stability of the LPBF process, and to demonstrate that the enthalpy ratio is a more appropriate integral parameter for predicting the stability of single track formation compared to the volumetric energy density (VED).</p>

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Towards an improved integrated parameter for evaluating the stability of laser powder bed fusion

  • 期刊论文

  • 发表日期：

    2025年12月27日

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  • Igor Yadroitsev,
  • Andrey V. Gusarov,
  • Anton du Plessis,
  • Roman Khmyrov,
  • Pavel Peretyagin,
  • Sergey Grigoriev

摘要

The advancement of additive manufacturing (AM) and the extensive implementation of laser powder bed fusion (LPBF) in high-performance industries necessitates the assurance of product quality. The quality of finished products and their properties is contingent upon the LPBF system, material, and the technological parameters of the process. Single tracks are the basic elements for LPBF parts, their combination creates a single layer, and a 3D object is built from a sequence of layers. To produce quality LPBF objects from powder metal material, it is necessary to use optimal parameters of the LPBF process, in which the single tracks remain continuous, and the process is stable. Stability can be achieved by determining the relationships between key physical quantities of the LPBF process. This paper presents a re-evaluation of the influence of some of the main process parameters on the stability of the LPBF process, and to demonstrate that the enthalpy ratio is a more appropriate integral parameter for predicting the stability of single track formation compared to the volumetric energy density (VED).