铸造技术2026，Vol.47Issue(4)：344-365,22.DOI:10.16410/j.issn1000-8365.2026.6002
激光和电子束增材制造β凝固γ-TiAl合金的研究进展和展望
Research Progress and Prospects of Laser and Electron Beam Additive Manufacturing for β-Solidifying γ-TiAl Alloys
摘要
Abstract
β-solidifying γ-TiAl alloys combine low-density and excellent mechanical properties at intermediate and high temperatures,making them promising candidates for low-pressure turbine blades in aeroengines.Solidification through theβ phase improves hot workability;however,the limited room-temperature ductility and poor formability of conventional casting and forging routes restrict the engineering application of complex components.Additive manufacturing offers a new technological pathway for near-net-shaped fabrication and microstructural control of β-solidifying γ-TiAl alloys.In this review,a comprehensive literature survey and comparative analysis are employed to systematically summarize recent progress in the fabrication of β-solidifying γ-TiAl alloys by laser powder bed fusion(L-PBF),laser-directed energy deposition(L-DED),and electron beam powder bed fusion(EB-PBF).The results indicate that laser-based additive manufacturing provides high geometric accuracy and significant microstructural refinement but suffers from strong crack susceptibility and high residual stresses.Under appropriate process parameters and high preheating conditions,EB-PBF can effectively reduce the cracking tendency,achieving a combination of room-temperature tensile strength exceeding 800 MPa and elongation reaching 2％～3％.However,issues such as aluminium element volatilization and microstructural coarsening remain.This paper focuses on the effects of processing parameters,thermal management,and postprocessing on the phase constitution,lamellar microstructures,and mechanical properties and further outlines future perspectives in alloy design,process optimization,and multiscale characterization.关键词
β凝固TiAl合金/激光粉末床熔融/激光定向能量沉积/电子束粉末床熔融/微观组织/力学性能Key words
β-solidifying TiAl alloy/laser powder bed fusion/laser-directed energy deposition/electron beam powder bed fusion/microstructure/mechanical properties分类
矿业与冶金引用本文复制引用
戴国坤,曹庭玮,赵睿鑫,侯雨阳,玄伟东,王江,陈超越,任忠鸣..激光和电子束增材制造β凝固γ-TiAl合金的研究进展和展望[J].铸造技术,2026,47(4):344-365,22.基金项目
国家自然科学基金(52474412) （52474412）
上海市自然科学基金面上项目(23ZR1421500) （23ZR1421500）
