本团队金俊松教授、博士生高畅等在Journal of Alloys and Compounds发表研究论文。

摘要：Al/Cu laminated metal composites (LMCs) demonstrate promising application prospects across multiple fields due to their functional integration advantages. However, challenges remain in controlling interlayer deformation compatibility and interfacial bonding quality during severe plastic forming. In this study, Al/Cu LMC thin-walled conical parts (TWCPs) with different thinning ratios (TRs) were fabricated via shear spinning, followed by a systematic analysis of macroscopic morphology, microstructure, and mechanical properties. The results indicate that interlayer deformation compatibility improves with increasing TR, driven by the work hardening of the Al layer and the reduction of stress gradients. The TWCPs achieve peak yield and ultimate tensile strengths at 50% TR, and a superior balance of shear strength and ductility at 65% TR. Microstructural analysis reveals that grain refinement in both Al and Cu layers intensifies with increasing TR; the former is governed by dynamic recovery and recrystallization, whereas the latter is dominated by dislocation accumulation and grain fragmentation. Furthermore, the interface evolves through the fracture of brittle intermetallic compounds (IMCs), the extrusion and contact of fresh metal matrices, and the subsequent formation and thickening of new IMCs layers as the TR increases. Molecular dynamics simulations demonstrate that higher TRs induce significant localized shear deformation and temperature rises, while accumulated dislocation densities and vacancy concentrations of Cu layer facilitate interdiffusion. This study elucidates the thermo-mechano-diffusion coupling mechanism in Al/Cu LMCs during shear spinning, providing a theoretical basis for optimizing the trade-off between strength and ductility in composite forming.