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Abstract: A comprehensive analysis of powder attributes and their critical effect on the optimized parameters is presented for the AlSi10Mg alloy used in the laser powder bed fusion (LPBF) process.
Two widely different powders, conventional vs. specialty, were characterized for their morphology, size distribution, flowability, apparent density, and internal/surface microstructure and composition using varies techniques.
The two powders also exhibited widely different optimized LPBF parameters as manifested by largely different volumetric energy density (VED) values required for an optimized microstructure and maximized tensile properties.
Such a difference in the LPBF performance was shown to closely correlate with the differences in the powder attributes. Particularly, the specialty powder (with a more spherical morphology, more uniform size distribution, more uniform chemical composition, less internal oxide content and thinner surface oxide layers) exhibited a higher flowability and apparent density, as well as a higher VED requirement and superior tensile properties.
Two widely different powders, conventional vs. specialty, were characterized for their morphology, size distribution, flowability, apparent density, and internal/surface microstructure and composition using varies techniques.
The two powders also exhibited widely different optimized LPBF parameters as manifested by largely different volumetric energy density (VED) values required for an optimized microstructure and maximized tensile properties.
Such a difference in the LPBF performance was shown to closely correlate with the differences in the powder attributes. Particularly, the specialty powder (with a more spherical morphology, more uniform size distribution, more uniform chemical composition, less internal oxide content and thinner surface oxide layers) exhibited a higher flowability and apparent density, as well as a higher VED requirement and superior tensile properties.
Abstract: A comprehensive analysis of powder attributes and their critical effect on the optimized parameters is presented for the AlSi10Mg alloy used in the laser powder bed fusion (LPBF) process.
Two widely different powders, conventional vs. specialty, were characterized for their morphology, size distribution, flowability, apparent density, and internal/surface microstructure and composition using varies techniques.
The two powders also exhibited widely different optimized LPBF parameters as manifested by largely different volumetric energy density (VED) values required for an optimized microstructure and maximized tensile properties.
Such a difference in the LPBF performance was shown to closely correlate with the differences in the powder attributes. Particularly, the specialty powder (with a more spherical morphology, more uniform size distribution, more uniform chemical composition, less internal oxide content and thinner surface oxide layers) exhibited a higher flowability and apparent density, as well as a higher VED requirement and superior tensile properties.
Two widely different powders, conventional vs. specialty, were characterized for their morphology, size distribution, flowability, apparent density, and internal/surface microstructure and composition using varies techniques.
The two powders also exhibited widely different optimized LPBF parameters as manifested by largely different volumetric energy density (VED) values required for an optimized microstructure and maximized tensile properties.
Such a difference in the LPBF performance was shown to closely correlate with the differences in the powder attributes. Particularly, the specialty powder (with a more spherical morphology, more uniform size distribution, more uniform chemical composition, less internal oxide content and thinner surface oxide layers) exhibited a higher flowability and apparent density, as well as a higher VED requirement and superior tensile properties.
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