Superplasticity of ceramic particulate reinforced magnesium alloy composite made by a vortex method

High Strain Rate Superplasticity (HSRS) in metal matrix composites offers an efficiently near-net shape forming method to automobile, aerospace industries. HSRS materials usually exhibit an elongation of 250-600% at a high strain rate of about 10(-1)similar to 10 s(-1). The purpose study is to develop a thermomechanical microstructure and to further produce HSRS in a ceramic particulate reinforced Mg alloy composite fabricated by a vortex method. The superplastic behavior at high strain rate was observed a TiC/Mg-5wt%Zn and TiC/ZK51Mg composite, fabricated by a vortex method, extrusion, and hot-rolling. The strain rate sensitivity (m value) of the composites is about 0.3 similar to 0.4. TiC/Mg-5wt%Zn exhibits the total elongation of 340% at strain rates 0.067s(-1) at 743K, although the hot-rolled TiC/ZK51 Mg composite indicates total elongation of 100% at a strain rates of 0.5x10(-1) s(-1), 673 similar to 713K.