In situ alloying: investigation of the melt pool stability during powder bed fusion of metals using a laser beam in a novel experimental set-up
In situ alloying: investigation of the melt pool stability during powder bed fusion of metals using a laser beam in a novel experimental set-up
复制标题
原位合金化：在新的实验装置中用激光束研究金属粉末床熔化过程中的熔池稳定性
DOI：
10.1007/s40964-021-00233-y
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发表时间：
2021-10-31
影响因子：
--
通讯作者：
Zaeh, Michael F.
中科院分区：
文献类型：
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作者：
Wimmer, Andreas;Hofstaetter, Fabian;Zaeh, Michael F.
使用激光束的金属粉末床熔融（PBF-LB/M）的有限材料可通过原位合金化得到补偿。可以具体影响单个熔池特性，以改善最终部件的机械性能。然而，传统的PBF-LB/M机器仅允许有限的进入以详细观察工艺区，特别是熔池。本文提出了一种方法，系统地分析熔池的横截面，以确定熔池深度的原位变化。设计了一个定制的PBF-LB/M测试台，以便使用高速红外摄像机对工艺区进行调查。使用专用算法自动处理图像数据。应用该方法分析了添加剂对熔池稳定性的影响。将316L不锈钢粉末与铝合金AlSi 10 Mg混合，混合量为20 wt.%。结果表明，混合粉末显著降低了熔池深度的变化。
The limited access to materials for the Powder Bed Fusion of Metals using a Laser Beam (PBF-LB/M) is compensated by in situ alloying. Individual melt pool characteristics can be specifically influenced to improve the mechanical properties of the final part. However, conventional PBF-LB/M machines allow only limited access for detailed observation of the process zone and, in particular, the melt pool. This paper presents a methodology for systematically analyzing the melt pool in the cross section to determine the in situ variation of the melt pool depth. A custom PBF-LB/M test bench was devised to enable investigation of the process zone using high-speed infrared cameras. The image data were processed automatically using a dedicated algorithm. The methodology was applied to analyze the effect of additives on the melt pool stability. Stainless steel 316L powder was blended with the aluminum alloy AlSi10Mg by up to 20 wt.%. It was found that the blended powder significantly reduced the variation of the melt pool depth.