Superplasticity of Al-Zn-Mg-Cu composite containing uniform TiB2 nanoparticles

An Al-Zn-Mg-Cu composite with the elongation of 557% at 450 °C and 1 × 10−3 s−1 was achieved by introducing TiB2 nanoparticles as reinforcement. On the one hand, TiB2 nanoparticles trigger the recrystallization of Al during annealing, resulting in a fine-equiaxed grain (2.1 μm) structure. On the other hand, TiB2 nanoparticles can effectively enhance the thermal stability of the composite by pinning grain boundaries. The post-mortem...