Melt pool geometry and morphology variability for the Inconel 718 alloy in a laser powder bed fusion additive manufacturing process
Melt pool geometry and morphology variability for the Inconel 718 alloy in a laser powder bed fusion additive manufacturing process
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DOI：
10.1016/j.addma.2019.100830
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发表时间：
2019-10-01
影响因子：
11
通讯作者：
Beuth, Jack
中科院分区：
文献类型：
--
作者：
Scime, Luke;Beuth, Jack
扩展了作者先前的工艺绘图工作，在激光粉末床熔合（L-PBF）工艺中，在Inconel 718合金的多个工艺参数组合下测量多个熔池横截面。这些数据的收集使得能够跨工艺空间研究熔池几何形状（例如宽度、深度和横截面积）的可变性。此外，测量的熔池几何形状的统计分布进行比较，一个等效的正态分布和有趣的离群值观察。熔池的横截面形态与诸如穿孔、孔隙度和球化的缺陷相关联，并且量化了缺陷的可变性。这项工作的最终产品是一个强大的L-PBF In 718熔池行为的描述，基于非原位观察，这可以链接到熔池形态的原位观察在未来的工作。
Expanding on prior process mapping work by the authors, multiple melt pool cross-sections are measured at multiple process parameter combinations for the Inconel 718 alloy in a Laser Powder Bed Fusion (L-PBF) process. Collection of such data enables the study of the variability of melt pool geometry (e.g. width, depth, and cross-sectional area) across process space. Furthermore, the statistical distribution of the measured melt pool geometries is compared to that of an equivalent normal distribution and intriguing outliers are observed. The cross-sectional morphology of the melt pools are associated with defects such as keyholing porosity and balling and the variability of the defects is quantified. The final product of this work is a robust description of L-PBF In718 melt pool behavior, based on ex-situ observations, which can be linked to in-situ observations of melt pool morphology in future work.