Laser Powder-Bed Fusion (L-PBF), often called selective laser melting (SLM), is a powder-bed fusion process in Additive Manufacturing (AM) that uses a laser beam to selectively fuse layers of powder into near net-shape components with little porosity. However, inconsistencies in the part properties due to the presence of defects in as-built components have hindered the widespread adoption of L-PBF for industrial applications motivating researchers to study the sources of variation for quality control purposes. A critical area suspected of creating variation in the part properties is the feedstock, where batch-to-batch differences as well as changes in the powder properties with reuse have the potential to affect performance. During processing, laser spatter and condensate form and deposit into the powder-bed surrounding the built parts. These particulates, collectively known as ejecta, differ morphologically and chemically from the virgin powder, potentially compromising reusability. In this study, 304L stainless steel powder was recycled for a total of 5 times through a systematic approach aimed at accelerating powder reuse to reveal its influence on both the tensile properties and impact toughness. Through analysis of variance (ANOVA), it was found that tensile properties did not change with reuse, while the impact toughness showed a steady decline revealing the differences in static and dynamic part properties due to powder reuse.

激光粉末床熔合（L-PBF），通常称为选择性激光熔化（SLM），是增材制造（AM）中的粉末床熔合工艺，该工艺使用激光束将粉末层选择性地熔合为接近最终形状的组件几乎没有孔隙。但是，由于在建部件中存在缺陷而导致零件特性不一致，这阻碍了L-PBF在工业应用中的广泛采用，从而促使研究人员出于质量控制目的而研究变化的来源。原料可能会怀疑会造成零件性能变化的关键区域，其中批次之间的差异以及粉末性质随重复使用而发生的变化都可能影响性能。在加工过程中，激光飞溅和冷凝物形成并沉积到围绕零件的粉末床中。这些颗粒（统称为喷射颗粒）在形态和化学上与原始粉末不同，可能会损害可重复使用性。在这项研究中，通过旨在加速粉末再利用的系统方法，将304L不锈钢粉末共回收了5次，以揭示其对拉伸性能和冲击韧性的影响。通过方差分析（ANOVA），发现拉伸性能不会随重复使用而变化，而冲击韧性却呈稳定下降趋势，这表明由于重复使用粉末，静态和动态零件性能存在差异。通过旨在加速粉末再利用的系统方法，将304L不锈钢粉末共回收了5次，以揭示其对拉伸性能和冲击韧性的影响。通过方差分析（ANOVA），发现拉伸性能不会随重复使用而变化，而冲击韧性却呈稳定下降趋势，这表明由于重复使用粉末，静态和动态零件性能存在差异。304L不锈钢粉末通过旨在加速粉末再利用的系统方法共回收了5次，以揭示其对拉伸性能和冲击韧性的影响。通过方差分析（ANOVA），发现拉伸性能不会随重复使用而变化，而冲击韧性却呈稳定下降趋势，这表明由于重复使用粉末，静态和动态零件性能存在差异。