Development of plastic Ti-based bulk-metallic-glass-matrix composites by controlling the microstructures

Lightweight and plastic Ti-based bulk-metallic-glass-matrix composites (BMGMCs) were fabricated by the Bridgman solidification. The β-Ti dendrites were uniformly distributed within the glass matrix. By tailoring the withdrawal velocity, v, the linear dependences of the spanning length, s, and the volume fraction, vf, of dendrites can be determined as: s = −30 v + 139 and vf = −12 v + 50, respectively. The plasticity of Ti-based BMGMCs was extensively studied in terms of the interdendrite spacing and the volume fraction of dendrites. An inverted U-shaped characteristic of the plasticity with the withdrawal velocity has been identified and explained. The present research gave a way for the design of plastic BMGMCs.

Research highlights▶ Ti-based bulk-metallic-glass-matrix composites were fabricated by the Bridgman solidification. ▶ The improved plasticity of Ti-based BMGMCs was obtained. ▶ An inverted U-shaped characteristic of the plasticity with the withdrawal velocity has been identified and explained.