研究目的
Investigating the formation and effects of spatter particles during laser beam melting of AlSi10Mg on powder quality.
研究成果
Spatter particles during LBM of AlSi10Mg significantly differ from virgin powder in geometric and chemical properties, affecting powder quality. A significant share of spatter particles can be segregated by sieving, but some will remain in recycled powder, impacting its quality.
研究不足
The study focuses on AlSi10Mg and may not be directly applicable to other materials. The influence of spatter pick-up on mechanical part properties needs further quantification.
1：Experimental Design and Method Selection
The study involved the characterization of spatter particles emerging during LBM of AlSi10Mg, focusing on geometric and chemical properties. Two isolation methods were used to collect spatter particles during the process.
2：Sample Selection and Data Sources
AlSi10Mg powder with a specified particle size distribution of 20-63 μm was used. Spatter particles were collected during the LBM process using two isolation methods.
3：List of Experimental Equipment and Materials
A SLM125HL machine (SLM Solutions Group, Luebeck, Germany) with a laser focus diameter of 70 μm was used for LBM processing. Characterization methods included SEM for particle size and morphology, inert gas fusion for oxygen content, XPS for oxide layer thickness, and ICP-OES for alloy composition.
4：Experimental Procedures and Operational Workflow
LBM processing was conducted with specific parameters: laser power of 300 W, scan speed of 1150 mm/s, and hatch distance of 0.17 mm. Spatter particles were collected and characterized using SEM, XPS, and ICP-OES.
5：Data Analysis Methods
Particle size distributions were described according to DIN ISO 9276-1. Sieving analysis was conducted according to DIN 66165 using a 75 μm mesh size. Chemical composition was analyzed using ICP-OES.
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