For an improved understanding and modelling of the melting process and dynamics in laser powder bed fusion the knowledge of the actual powder layer height and its development is essential. According to theoretical calculations the powder layer thickness approaches the quotient of the nominal layer height and the powder layer density after several layers. However, a previous study shows that in this stable state the actual powder layer thickness is much higher than theoretically expected due to denudation and spattering. Based on the approach of past investigations this study examines experimentally the development of the effective powder layer height by varying the nominal layer thickness and the laser parameters. Furthermore, the influence of these process parameters on the formation of the denudation zone was examined. The results show the significant impact of the variation of the laser parameters on the actual powder layer thickness likely caused by denudation and spatter effects. Moreover, for low nominal layer heights the effective powder layer thickness is relatively higher. This development seems to be affected by the selection of the laser parameters. The outcomes also provide a possible explanation for the unexpected high increase in powder consumption, which amounts to at least 98% compared to theoretical calculations within the experiments.

为了更好地理解和建模激光粉末床融合中的熔化过程和动力学，了解实际粉末层高度及其发展是必不可少的。根据理论计算，粉末层厚度在几层后接近标称层高和粉末层密度的商。然而，先前的研究表明，在这种稳定状态下，由于剥蚀和飞溅，实际粉末层厚度远高于理论预期。基于过去的研究方法，本研究通过改变标称层厚度和激光参数，通过实验检验了有效粉末层高度的发展。此外，检查了这些工艺参数对剥蚀区形成的影响。结果表明激光参数的变化对可能由剥蚀和飞溅效应引起的实际粉末层厚度的显着影响。此外，对于低标称层高，有效粉末层厚度相对较高。这种发展似乎受到激光参数选择的影响。结果还为粉末消耗的意外高增加提供了可能的解释，与实验中的理论计算相比，该增加至少达到 98%。