Laser & Optoelectronics Progress, Volume. 59, Issue 19, 1916004(2022)
Investigation of Spatter Characteristics in Selective Laser Melting Based on Maximum Entropy Threshold Segmentation Algorithm
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Fig. 2. Spatter images at different laser powers. (a) P=100 W; (b) P=150 W; (c) P=200 W
Fig. 3. Spatter images processing process. (a) Morphological filtering; (b) maximum entropy thresholding segmentation; (c) molten pool interference removal; (d) spatter contour extraction
Fig. 6. Spatters contour superimposed on original image. (a) P=100 W; (b) P=150 W; (c) P=200 W
Fig. 7. Statistics of spatter characteristics under different laser powers. (a) Total spatter area; (b) total spatter number; (c) distribution of total spatter number as a function of spatter area
Table 1. Main technical parameters of SLM in the experiment
View tableTable 1. Main technical parameters of SLM in the experiment
Item Wavelength /nm Max laser power /W Focus beam size /μm Building chamber /（mm×mm×mm） Scan speed /（mm·s-1） Value 1090 200 70 100×100×120 400
Table 2. 316L stainless steel powder chemical compositions
View tableTable 2. 316L stainless steel powder chemical compositions
Chemical composition C Cr Ni Mo Si Mn O Fe Mass fraction /% 0.03 17.53 12.06 2.16 0.86 0.38 0.13 66.85
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Linjun Zhao, Guoqing Zhang, Dalin Zhang, Zhiwen Li. Investigation of Spatter Characteristics in Selective Laser Melting Based on Maximum Entropy Threshold Segmentation Algorithm[J]. Laser & Optoelectronics Progress, 2022, 59(19): 1916004
Paper Information
Category: Materials
Received: Sep. 13, 2021
Accepted: Oct. 8, 2021
Published Online: Sep. 23, 2022
The Author Email: Zhang Guoqing (guoqingzhang_1989@126.com)
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