Research progress on powder-layering and melting behavior in powder additive manufacturing
SI Liang，ZHOU Mengyuan，LI Maoyuan，ZHANG Yun，ZHOU Huamin
State Key Laboratory of Materials Processing and Die & Mould Technology，School of Materials Science and
Engineering，Huazhong University of Science and Technology，Wuhan 430074，China
Abstract：In recent years, the powder-based additive manufacturing has become one of the fastest developing and
most widely used additive manufacturing technologies with significant advantages in forming complex shapes and
parts with excellent performance. The process involves complex behaviors at multiple scales, such as microstructure
evolution, mesoscopic powder flow/melting, and macroscopic stress deformation. A deep understanding of
these behaviors is the key to the stable forming of parts with excellent properties. In this paper, the research status
of powder properties and processing conditions on powder flow stratification, and powder layer quality and processing
parameters on powder melting behavior in fabrication are reviewed.
2022, Vol. 32 
