Abstract

This chapter introduces the microstructure and mechanical properties of typical metal materials like iron-based alloy, titanium-based alloy, aluminum alloy, and nickel-based alloy prepared by SLM, and studies Ti-6Al-4V metallic metamaterials, such as pentamode material (PM) structure. First, it analyzes and compares the formation law of melt pool morphologies and microstructure of these alloys under different process parameters, such as laser powder, scanning speed, layer thickness, and scanning distance. Second, it establishes the performance control method of SLM-formed parts by investigating how process parameters, scanning strategy, preheating, remelting, and postprocessing impact the mechanical properties. Eventually, it evaluates the mechanical properties of the Ti-6Al-4V metallic PM structures with different geometric parameters through experiments and a finite element model.

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