Virtual and Physical Prototyping
Taylor & Francis
Centre for Advanced Materials and Manufacturing / School of Engineering
The authors thank the financial support from the National Key R&D Program of China (grant number 2022YFB4601000), the National Natural Science Foundation of China (grant number 52204391), the Special Fund Project for Science and Technology Innovation Strategy of Guangdong Province (grant number STKJ2021025, grant number STKJ202209021 & grant number STKJ2023040), the Characteristic Innovation Project (Natural Science) for Regular University in Guangdong Province (grant number 2022KTSCX038), and Shantou University Research Foundation for Talents (grant number NTF21013).
The high cost of laser powder bed fusion (LPBF) fabricated high-strength Sc containing aluminium alloy hinders its applications. To reduce the cost, we reported a LPBF fabricated strong and ductile Al–Mn–Mg–Sc–Zr alloy using large layer thicknesses to improve the fabrication efficiency on coarse powder particles. A high relative density exceeding 99.2% was achieved at layer thicknesses up to 120 μm. In post-process heat-treated specimens, the yield strength only had a slight 6% decrease from layer thickness of 30 to 120 μm; such a decrease in strength was attributed to the larger grain size resulted from the adopted larger layer thickness. The fabricated sample at layer thickness of 120 μm still exhibited high tensile yield strength of 472 MPa and fracture strain of ∼10%. This work showed a successful application of improving the LPBF fabrication efficiency of high-strength Al–Mn–Mg–Sc–Zr alloy using large layer thickness in LPBF process.
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