电弧增材制造航空钛合金构件组织及力学性能研究现状

航空航天领域通常将钛合金作为承力结构件使用,对其性能和可靠性都有很高的要求,大型结构件的整体化制造是实现这些需求的有效途径。电弧增材制造技术因效率高、成本低、致密度高,在制备大型结构件方面具有一定优势。综述了国内外电弧增材制造钛合金组织的研究现状,介绍了改变形核条件以及引入轧制、超声等外场辅助技术调控后所得的电弧增材制造钛合金组织。对电弧增材制造钛合金的拉伸性能和疲劳性能进行了综述,总结了拉伸性能和疲劳性能的特点及断裂的原因。最后,对航空航天用钛合金电弧增材制造的组织及力学性能的关系进行了分析,并且对两者的调控前景进行了展望。

Research Progress of Microstructure and Mechanical Properties of Aerospace Titanium Alloy Members by Wire Arc Additive Manufacturing Technology

Titanium alloys are usually used as load-bearing structural parts in aerospace industry, which have high require-ments for performance and reliability. Integral manufacturing of large structural parts is an effective way to meet these requirements. Wire arc additive manufacturing technology has certain advantages in produced large structural parts because of its high efficiency, low cost and high density. In this paper, researches on titanium alloy microstructure in wire arc additive manufacturing at home and abroad were reviewed and the nucleation conditions and external field assist technologies such as rolling and ultrasonic were introduced. The tensile properties and fatigue properties of titanium alloys were investigated. The characteristics of tensile properties and fatigue properties and the causes of fractures were summarized. Finally, the relationship between the microstructure and mechanical properties of titanium alloy arc additive manufacturing for aerospace were analyzed, and the prospects for both control were prospected.