Abstract
With the development of aerospace equipment for lightweight,integrated,and highly reliable structures,conventional manufacturing processes for aluminium alloys are becoming increasingly unable to meet the requirements of advanced aircraft and spacecraft in terms of complex-structure fabrication,material utilization,and manufacturing cycles.Owing to its high design freedom,near-net-shaped forming capability,and advantages in integrated structural manufacturing,additive manufacturing provides a new technical route for the fabrication of aerospace aluminium alloy components.Focusing on recent progress in additive manufacturing of aluminium alloys for aerospace applications,this paper systematically reviews the characteristics of major additive manufacturing processes,including laser powder bed fusion,wire arc additive manufacturing,and directed energy deposition.The forming behavior,microstructural evolution,defect control,and property regulation of typical aluminium alloy systems,including Al-Si,Al-Cu,Al-Mg,Al-Mg-Si,and Al-Zn-Mg-Cu alloys,are analysed in detail.In addition,representative engineering applications,such as lightweight brackets,communication satellite waveguides,space optical components,and rocket propellant tanks,are summarized to illustrate the current application status of additively manufactured aluminium alloys in aerospace components.Finally,key challenges in aerospace aluminium alloy additive manufacturing,including hot cracking,porosity,residual stress,microstructural anisotropy,and service reliability,are discussed,and future development directions are proposed,including the design of aluminium alloys specifically for additive manufacturing,intelligent process control,synergistic optimization of postprocessing,and standardization and certification.关键词
航空航天铝合金/增材制造/激光粉末床熔融/电弧增材制造/定向能量沉积/工程应用Key words
aerospace aluminium alloys/additive manufacturing/laser powder bed fusion/wire arc additive manufacturing/directed energy deposition/engineering applications分类
矿业与冶金
