Dendrite size dependence of mechanical properties of in-situ Ti-based bulk metallic glass matrix composites

The relations between dendrite size and mechanical properties in an in-situ Ti-based bulk metallic glass composite (BMGC) have been investigated by using copper mold casting and semi-solid processing methods. Three Ti-based BMG composites with different dendrite sizes without changing glass matrix simultaneously were successfully obtained, which gives a new way to quantitively understand the relationship between dendrite size and mechanical properties. Results show that the yield strength decreases as the dendrite size increases and there exists an optimum dendrite size for both the plasticity and work hardening capacity.