On the mechanical properties of particle reinforced metallic glass matrix composites

In the present manuscript a modified coupled thermo-mechanical constitutive model is employed to describe the mechanical property of metallic glass (MG) matrix, and the geometrical models of particle reinforced MG matrix composites are established based on the inner structures. Then finite element method (FEM) numerical simulations on the mechanical properties of composites are conducted systemically by integrating with related experimental investigations, and the effects of different factors, including the volume fraction of particle (which determines the amount of particle and the interspace between particles), the mechanical property of particle material and the strain rate, on the deformation and failure characteristics of composites are analyzed. Related analysis demonstrates that the composite mainly displays as a shear manner, however, the reinforced particles can lead to an improvement for its plasticity. Furthermore, several internal and external factors have significant influences on the deformation and failure characteristics of composites. The corresponding mechanical properties depend firmly on the initiation and propagation of shear band and shear crack within the composite.