Abstract Powder bed additive manufacturing technologies gained much attention in past years not only thanks to design freedom but also because of the peculiar microstructures and mechanical properties that can be obtained thanks to the extremely high cooling rate. However the phenomena that arise during the laser scanning are not yet deeply understood. In this work the effect of the main building parameters and of powder properties on the shape, the microstructure and the properties of Al-based LPBF single scan tracks was evaluated. The experiments were carried out with three different powders in order to understand of the effect of the material thermo-physical properties on the consolidation phenomena.

中文翻译：

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铝基粉末的单扫描轨迹分析

摘要 粉末床增材制造技术在过去几年备受关注，这不仅是因为设计自由，而且还因为极高的冷却速率可以获得特殊的微观结构和机械性能。然而，激光扫描过程中出现的现象还没有被深入理解。在这项工作中，主要构建参数和粉末特性对铝基 LPBF 单扫描轨迹的形状、微观结构和性能的影响进行了评估。为了了解材料热物理特性对固结现象的影响，用三种不同的粉末进行了实验。