相场法模拟增材制造及焊接过程中显微组织的研究进展

Research Progress on Microstructure Simulation by Phase Field Method inAdditive Manufacturing and Welding Process

增材制造以及焊接过程都是多物理场耦合的复杂过程,难以采用试验方法直接观测熔池显微组织的演变过程。随着计算材料学和数值模型的快速发展,从数值模拟出发研究凝固过程中的显微组织演变成为可能。对比分析了几类常用的显微组织模拟方法,其中相场法在晶粒形貌模拟准确性上具有独特的优势。综述了相场法在增材制造及焊接领域模拟显微组织的应用现状,并对未来的研究方向进行了展望。

The processes of additive manufacturing and welding are both complex processes with multiple physical field coupling,and it is difficult to directly observe the evolution of the microstructure of the molten pool by experimental methods.With the rapid development of computational material science and numerical models,it is possible to study the microstructure evolution during solidification by numerical simulation.Several commonly used microstructure simulation methods are compared and analyzed,among which the phase field method has a unique advantage in the accuracy of grain morphology simulation.The application status of phase field method in the microstructure simulation in additive manufacturing and welding fields is reviewed,and the research direction in future is prospected.