TiAl合金粉床电子束选区熔化成形研究进展

Research Progress in TiAl Alloys Prepared by Powder Selective Electron Beam Melting

粉床电子束选区熔化成形是增材制造脆性TiAl合金复杂构件的理想技术。从原料粉末、致密化、化学成分、微观组织、凝固及相变、后处理、力学性能、成形精度与表面粗糙度等几个方面综述了粉床电子束选区熔化成形TiAl合金的研究现状,对目前存在的问题及应对措施进行了评述,并对其未来研究方向进行了展望。

Powder selective electron beam melting is an ideal additive manufacturing technology for the fabrication of brittle TiAl alloy complex components.In this paper,the research progress in TiAl alloys prepared by selective electron beam melting are reviewed from the aspects of raw material powder,densification,chemical composition,microstructure,solidification and phase change,post-processing,mechanical performance,forming accuracy and surface roughness.The problems existing in the research and the corresponding measures are remarked,and the future development strategies are prospected.