Review of functionally graded materials processed by additive manufacturing

Additive manufacturing (AM) technology makes parts through layer-by-layer deposition, which can regulate the microstructure and properties of different parts of a single part well. It provides a new idea for the preparation of functionally gradient materials (FGM), and has become a research hotspot at present. By referring to and analyzing the recent research achievements in the additive manufacturing technology of FGM, the latest research progress at domestic and abroad from four aspects were summaried: selective laser melting additive manufacturing, electron beam additive manufacturing, arc additive manufacturing, path planning, and material texture. Moreover, the existing problems in the research are pointed out, and the future research direction and focus are prospected.