Predictive simulation of process windows for powder bed fusion additive manufacturing: Influence of the powder size distribution
Predictive simulation of process windows for powder bed fusion additive manufacturing: Influence of the powder size distribution
复制标题
粉末床熔融增材制造工艺窗口的预测模拟：粉末尺寸分布的影响
DOI：
10.1016/j.camwa.2018.06.029
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发表时间：
2019
期刊：
影响因子：
--
通讯作者：
C. Körner
中科院分区：
文献类型：
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作者：
A. Rausch;M. Markl;C. Körner
通过粉末床熔融增材制造的零件的性能取决于工艺策略以及粉末床的特性。本研究的目的是确定不同粉末粒度分布对Ti-6Al-4V工艺窗口中某些工艺参数的影响。所有结果均来自我们的内部软件SAM PLE 2D。第一个目标是识别引起多孔结构的层结合断层。我们展示了单层和多层结合故障的影响，每个单层的表面粗糙度和工艺窗口的后果。第二个目标是调查最终样品的粗糙度。通常，最小的表面粗糙度旨在减少表面精加工的后处理工作。通过结合孔隙率和样品表面粗糙度的研究结果，我们得出结论，具有较大平均粒径的粉末粒度分布通常会降低工艺可靠性并增加所需的能量输入。
The properties of parts fabricated by powder bed fusion additive manufacturing depend on the process strategy as well as the characteristics of the powder bed. The aim of this study is to determine the influence of different powder size distributions for certain process parameters taken from a process window for Ti–6Al–4V. All results are obtained from our in-house software S AM PLE 2D. The first objective is identifying layer binding faults causing porous structures. We demonstrate the influence of surface roughness of each single layer for single-and multi-layer binding faults and the consequences for process windows. The second objective is the investigation of the final sample roughness. Generally, a minimal surface roughness is aimed to reduce the post-processing effort for surface finishing. By combining the findings regarding porosity and sample surface roughness, we conclude that powder size distributions with larger mean particle diameter generally diminish the process reliability and increase the required energy input.