1. Key Laboratory of Electromagnetic Processing of Materials of Ministry of Education,Northeastern University, Shenyang 110819, China2. Key Laboratory for Anisotropy and Texture of Materials of Ministry of Education, School of Material Science and Engineering, Northeastern University, Shenyang 110819, China3.Division of Engineering Materials, Link-ping University, Link-ping 58183, Sweden
Laminated metallic composites (LMCs), designed based on the concept of heterostructured materials, can realize the synergistic improvement of strength and ductility for metallic structural materials by adjusting their internal multiscale microstructure characteristics, and have potential application prospects in the advanced manufacturing fields. The macroscopic mechanical properties of LMCs strongly depend on the intrinsic properties and layer thickness of individual constituents as well as the characteristics of heterophase interfaces. During the deformation process, the microscopic stress/strain accommodation characteristics at the heterophase interfaces play a crucial role in the deformation micro-mechanisms of constituent metals, thereby influencing the global performance of the LMCs. Therefore, exploring the internal correlation of “microstructure-mechanical behavior-deformation mechanisms-mechanical properties” of LMCs and revealing the corresponding microscopic mechanisms have important theoretical guiding significance and practical application value for designing LMCs with excellent comprehensive mechanical properties. This paper focuses on the micro-mechanical behaviors and deformation mechanisms of crystalline LMCs, introduces the size and interface effects on the mechanical behaviors. Especially, the micro-mechanical behaviors at room temperature are discussed, which sheds light on the strengthening and toughening mechanisms of heterogeneous LMCs. Finally, a brief prospect on the mechanical behavior research of LMCs in the future is given.