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Effect of Processing Parameters on Tensile Properties and Microstructure of Selective Laser Melted AlSi10Mg Alloy
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Effect of Processing Parameters on Tensile Properties and Microstructure of Selective Laser Melted AlSi10Mg Alloy
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Journal Article
Effect of Processing Parameters on Tensile Properties and Microstructure of Selective Laser Melted AlSi10Mg Alloy
2025
Overview
Selective laser melting (SLM) technology is one of the commonly used technologies in metal additive manufacturing. In this study, AlSi10Mg powder was used as the raw material to form 9 groups of specimens with different combinations of laser power and scanning speeds through the SLM process. Tensile testing, density testing, XRD, LSCM, SEM and EDS analysis were performed to indicate the effects of laser power and scanning speed on density, microstructure and tensile properties of SLM AlSi10Mg alloys were studied. The results show that increasing the laser power and reducing the scanning speed within a certain range can improve the continuity of the formed specimens, and significantly reduce the porosity. For parameter combinations with the same energy density, when laser power and scanning speed are simultaneously increased, the laser power has a dominant effect on increasing the temperature inside the molten pool, leading to more uniform melting of the powder. This can improve both the density and internal porosity distribution, and furthermore produce more precise and uniform microstructures. The relative density and tensile strength of the specimens formed at 225 W/1625 mm/s are 3.6 and 16.5% higher than 135 W/975 mm/s, respectively.
Publisher
Springer US,Springer Nature B.V
Subject
