Effect of fiber volume fraction on the compressive properties of the W fiber/Zr-based metallic glass composites

The W fiber W_f/Zr-based metallic glass composites with different fiber volume fraction V_F were prepared by infiltration and rapid solidification. The V_F were 47%, 66%, 77% and 86%, respectively. The effect of V_F on the quasi-static compression mechanical properties and deformation behavior of the W_f/Zr-based metallic glass composites was researched in detail. The results show that the yield strength of the W_f/Zr-based metallic glass composites increases with increase of the V_F. The plastic strain firstly increases and then decreases with increase of the V_F. The plastic strain is the largest when the V_F is 66%. The change of the plastic strain in the W_f/Zr-based metallic glass composites mainly depends on the interaction between matrix and W_f. With increase of strain, the quantity and density of the shear bands in the matrix increase, and the main shear band deflects towards the direction more than 45°. The stress state in the end and middle of the W_f/Zr-based metallic glass composites sample is different during compression because of the influence of the pressure head, which results in the direction of the shear bands difference in different areas of the sample. The failure modes of the W_f/Zr-based metallic glass composites change from shear fracture to longitudinal splitting with the increase of the V_F. The fracture behavior the W_f/Zr-based metallic glass composites complies with the Mohr-Coulomb criterion.