增材制造TiAl合金的研究进展

Research Progress on Additive Manufacturing TiAl Alloy

轻质耐热的TiAl合金是航空航天和民用工业等领域最具潜力的高温结构材料之一。然而,由于其低的延展性和断裂韧性,制造TiAl零部件具有挑战性。目前,增材制造工艺被认为是制造TiAl零件具有前途的技术之一。本文在介绍增材制造技术原理和特点的基础上,综述了激光金属沉积(LMD)、选区激光熔化(SLM)和电子束熔化(EBM)制备TiAl合金的工艺-组织-性能关系,并对该技术未来的发展趋势进行了展望。

One of the most promising high-temperature structural materials in aerospace and civil industries is the lightweight and heat-resistant TiAl alloys.However,owing to their low ductility and fracture toughness,manufacturing TiAl parts is challenging.At present,additive manufacturing process is considered one of the most promising technologies for manufacturing TiAl parts.Based on the principles and characteristics of additive manufacturing technology,this paper summarizes the process-structureproperty relation of laser metal deposition(LMD),selective laser melting(SLM),and electron beam melting(EBM)in the preparation of TiAl alloy.Furthermore,this paper discusses the future development trends of additive manufacturing technology.