Recent Progress and Perspectives of Phase-Field Modelling in Metal Additive Manufacturing

Author of the article:LIU Jia, GAO Jianbao, LI Zhicheng, MA Sa, ZHONG Jing, ZHANG Lijun

Author's Workplace：State Key Lab of Powder Metallurgy, Central South University, Changsha 410083, China

Key Words：metal additive manufacturing; phase-field methods; finite interface dissipation; microstructure evolution; alloy design

Abstract：Metal additive manufacturing involves many complex physical processes such as heat and mass transfer, phase
transformation, grain growth, fluid flow, etc. It is difficult to quantitatively simulate the microstructure evolution of metal
additive manufacturing. The phase-field method can describe complex microstructures such as the gas/liquid/solid phase
and grain shape/orientation by using order parameters, and directly introduce field variables describing physical processes
(such as concentration, temperature, fluid flow rate, etc.), showing great advantages in the simulation of the microstructure
of the metal additive manufacturing process. In this paper, the development and classification of the phase-field method are
briefly introduced, the characteristics of different phase-field models are summarized, and the research progress of different
phase-field models in the simulation of microstructure evolution during the solidification process of metal additive
manufacturing is reviewed in detail. The advantages and limitations of different phase-field models in the application of
metal additive manufacturing are emphatically discussed. Finally, the application prospect of the phase-field method in
metal additive manufacturing is prospected, and its development direction is pointed out.