Chinese Journal of Lasers, Vol. 47, Issue 9, 0900001 (2020)
Research Progress on Spatter Behavior in Laser Powder Bed Fusion
Wang Di, Ou Yuanhui, Dou Wenhao, Yang Yongqiang*, and Tan Chaolin
- School of Mechanical and Automotive Engineering, South China University of Technology,Guangzhou, Guangdong 510640, China
During the laser powder bed fusion (LPBF) process, metal powder is rapidly melted and solidified under the action of a high-energy laser beam. The spatter phenomenon accompanies the complex heat conduction process. Spatter is essentially a process by which materials in and near the laser and metal powder areas move to the surrounding area. These materials not only fall to the molding area and affect the quality of the molded part but also fall to the non-molded area to contaminate the clean powder. This is a disadvantage of the molding process. In addition, spatter carries rich information, which can be used to monitor the forming process. Detailed analysis and study are expected to improve the theoretical basis of LPBF forming, solve the process reliability problem of LPBF technology, and ultimately improve the product quality. Therefore, this study takes the spatter behavior in the LPBF process as the research object, combines with the relevant research in recent years to summarize the spatter behavior in the LPBF process at home and abroad and the status of process monitoring and quality control technology based on spatter characteristics.
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