High-speed X-ray investigation of melt dynamics during continuous-wave laser remelting of selective laser melted Co-Cr alloy
High-speed X-ray investigation of melt dynamics during continuous-wave laser remelting of selective laser melted Co-Cr alloy
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DOI：
10.1016/j.cirp.2019.04.110
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发表时间：
2019-01-01
影响因子：
4.1
通讯作者：
Pfefferkorn, Frank E.
中科院分区：
文献类型：
--
作者：
Richter, Brodan;Blanke, Nena;Pfefferkorn, Frank E.
本研究的目的是量化使用选择性激光熔化制造的Co-Cr合金在连续波激光重熔过程中的熔池动力学。这些知识将为激光重熔的工艺改进和数值模拟提供信息。高强度x射线束以50 kHz帧率成像表面2 mm × 0.5 mm区域。对这些视频的分析量化了熔池表面波的运动，并将其与初始表面特征进行了比较。结果表明，锁孔及其特征振荡可以抑制初始表面上的大波长特征。(C) 2019年由Elsevier Ltd代表CIRP出版。
The objective of this study is to quantify the melt pool dynamics during continuous wave laser remelting of a Co-Cr alloy manufactured using selective laser melting. This knowledge will inform process improvement and numerical modeling of laser remelting. A high-intensity X-ray beam imaged a 2 mm x 0.5 mm area of the surface with a 50 kHz framerate. Analysis of these videos quantified the melt pool surface wave movement and compared this to the initial surface features. The results indicate that the keyhole and its characteristic oscillations can suppress large wavelength features on the initial surface. (C) 2019 Published by Elsevier Ltd on behalf of CIRP.