Effect of nanodiamond content on the hot deformation behaviors of ND/ZK60 composites

The effect of nanodiamond (ND) content on the microstructures, textures and hot deformation behaviors of ND/ZK60 (Mg-5.1 Zn-0.18 Zr (wt%)) composites were systematically studied. The results showed that the grains size of composites was refined with increasing ND content. The ND particles existed at grain boundaries and formed a ball effect during hot compression, which increased the elongations of composites. The ball effect plays a key role in promoting grain boundary gliding and reducing the textures of composites during hot compression. The ND particles were difficult to disperse evenly when the content of ND exceeds 0.1%, which caused the flow stress of composites first increased and then decreased with increasing ND content.