航天铝合金大型构件变形控制是影响新一代中小型商业运载火箭及武器型号产品研制的关键瓶颈问题，亟需开展其制造工艺的机理研究与技术探索。本申请针对这一重大需求，面向大型构件低压铸造、淬火、蠕变时效、机加工的制造全流程，重点研究晶粒、微观孔洞、元素等组织特征的演化历程，建立基于微观组织耦合的力学行为模型；构建制造全流程的基础数据框架与数字化模型，揭示大型构件制造过程残余应力与变形的演化机理。最终实现典型航天大型构件的性能预测，揭示其变形规律，提出变形控制新方法，为新一代箭体构件大型化、轻量化、一体化、复杂化研制提供制造理论支撑与工程指导。

The distortion control of large aluminum components becomes the bottleneck for developing the new generation of commercial launch vehicles and weapon products. It is urgent to investigate the theory and technology on manufacturing processes of aerospace components. To aim at the significant requirement, this proposal focuses on the through-process research of large aluminum components, which is in sequence of low-pressure casting, quenching, creep aging, and machining processes. The material evolution is investigated on grains, micro-porosity and chemical elements, and the microstructure-based model of mechanical behavior is proposed. The fundamental framework of data and digitalized model on the through-process manufacturing will be constructed to reveal the principle of residual stress and distortion. The performance and distortion of the representative component can be predicted by using the theory and models and new technologies for distortion control will be designed. The research achievements will provide theoretical foundation and technical support for developing large components of the new generation of launch vehicles.