Composition design optimization method of aluminum alloy for selective laser melting

A composition design optimization method of aluminum alloy for selective laser melting, comprising the following steps:

• S1:
• preparing raw materials according to different designed formulas, and making alloy ingots with different composition;
• S2:
• pre-treating and processing the alloy ingots to obtain alloy sample blocks with different composition;
• S3:
• using high-energy laser beam perform on surface of each alloy sample block for first laser scanning to form a first laser melting layer on the surface thereof, then using high-energy laser beam again to perform on area of the first laser melting layer for second laser scanning to form a second laser melting layer;
• S4:
• treating the alloy sample blocks from the step S3 by induction heating and quenching;
• S5:
• inspecting surface morphology, characterizing and testing microstructure and properties of the second laser melting layer of each alloy sample block from the step S4, to determine whether the alloy sample blocks are suitable for selective laser melting process and optimize composition of the alloy sample blocks.