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
- Laser & Optoelectronics Progress
- Vol. 59, Issue 19, 1916004 (2022)
Fig. 1. Device for acquiring spatter images
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. 4. Grayscale histogram of spatter images
Fig. 5. Molten pool interference removal. (a) P=100 W; (b) P=150 W; (c) P=200 W
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
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Table 1. Main technical parameters of SLM in the experiment
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Table 2. 316L stainless steel powder chemical compositions
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