Enhancement of Tensile Plastic Stability in Ti-Based Metallic Glass Composite with Substrate of Titanium Alloy

The tensile plastic stability of Ti-based metallic glass composites (MGCs) enhanced by substrates of titanium alloys was investigated. It was found that both the yield strength and geometrical dimension of the substrate can greatly influence the tensile plastic stability of MGC bimetals. The substrate of high-strength Ti6Al4V (T64) alloy can enhance 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 pure titanium substrate. These phenomena were explained from the normalized strain-hardening rate. These findings indicates that metallic glass materials are intrinsically ductile, their plastic stability can be enhanced by suitable reinforcer with optimized geometrical dimension