Abstract
The tensile plastic stability of Ti-based metallic glass composites (MGCs) with substrates of titanium alloys was investigated. The findings have shown that the tensile plastic stability of MGC bimetals was significantly dependent on both the yield strength and geometrical dimension of the substrate. The substrate of high-strength Ti6Al4V (T64) alloy can enhance the ductility of the MGC greatly, while the MGC bimetal combined with low-strength pure titanium (PT) displayed worsen plastic stability. Further results showed that the plastic stability of the MGC was enhanced remarkably by increasing the thickness ration of the PT substrate. The enhancement of plasticity stability in the bimetals were explained and discussed from the perspective of normalized strain-hardening rate. These findings indicates that the plastic stability of MGCs can be enhanced by suitable reinforcer with optimized geometrical dimension. • The plastic deformation of Ti-based metallic glasses strongly depends on the mechanical properties of the substrates. • Homogeneous plastic deformation under tension can be realized in the MGC bimetals with substrate of titanium alloy. • The plastic stability of MGC bimetals can be explained by the concept of normalized strain-hardening rate.
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