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Microstructure and mechanical behavior of the 3D printed Inconel 718: In-situ TEM study

Development of additive manufacturing (AM) process such as selective laser melting (SLM) enables direct 3D printing of metal alloys. SLM method uses a scanning laser to melt and fuse powder bed layer-by-layer to create bulk materials with complicated three-dimensional structures. This laser processing accompanies rapid heating and cooling, leading to the formation of nonequilibrium phases with fine-scale microstructure. The mechanical properties of the materials produced by SLM can be different from that by conventional fabrication routes such as casting and forging, which can be advantage or disadvantage depending on the applications.[1]