Abstract
Multilayer metal composites have great application prospects in automobiles, ships, aircraft and other manufacturing industries, which reveal their superior strength, toughness, ductility, fatigue lifetime, superplasticity and formability. This paper presents the various mechanical properties, deformation characteristics and strengthening–toughening mechanisms of laminated metal matrix composites during the loading and deformation process, and that super-high mechanical properties can be obtained by adjusting the fabrication process and structure parameters. In the macroscale, the interface bonding status and layer thickness can effectively affect the fracture, impact toughness and tensile fracture elongation of laminated metal matrix composites, and the ductility and toughness cannot be fitting to the rule of mixture (ROM). However, the elastic properties, yield strength and ultimate strength basically follow the rule of mixture. In the microscale, the mechanical properties, deformation characteristics, fracture behavior and toughening mechanisms of laminated composites reveal the obvious size effect.
Highlights
Strength and toughness are important indices to evaluate the mechanical properties of metal base materials, and achieving this strengthening–toughening aim of the metal matrix composites is the unremitting pursuit goal of materials scientists [1,2]
Low ductility and toughness always lead to fracture failure rapidly and catastrophic accidents, which seriously limit the widespread applications of metal matrix composites [3]
Stiff substrate, respectively, and fracture modes of metal films transmit from small strain fracture, to the laminated metal matrix composites with strong interface, Serror et al [36] found that multiple and multiple necking at to the a large strain uniform deformation mode
Summary
Strength and toughness are important indices to evaluate the mechanical properties of metal base materials, and achieving this strengthening–toughening aim of the metal matrix composites is the unremitting pursuit goal of materials scientists [1,2]. Severe plastic deformation at the high temperature range during the hot rolling and hot forging process results in the strong interface bonding between soft steel and hard steel. Through the reasonable adjusting chemical compositions and contents of constitute layers, as well as the interface characteristics and fabrication parameters of laminated metal matrix composites, the aim of present work is in order to provide the design idea and theoretical basis of strengthening-toughening effect.
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