Mg-Ti composites fabricated by a novel one-step high-pressure sintering: The correlation between microstructures and mechanical properties

Simultaneous sintering of low-melting-point Mg and high-melting-point Ti was achieved by a novel one-step high-pressure solid-state sintering technique. The correlation between the microstructures and the mechanical properties of the high-pressure-sintered Mg-Ti composites is elucidated. The Young?s modulus of the sintered Mg-Ti composites is in good agreement with the theoretical value, indicative of a sufficient sintering which is difficult to obtain via conventional sintering techniques. The compressive yield strength of the Mg-Ti composites increases with the contents of Ti. However, the plasticity shows a parabolic trend, where the composites with a bicontinuous microstructure show the lowest plasticity. The low plasticity can be mainly attributed to: i) the inherent deformation incompatibility between soft Mg and hard Ti phases, and ii) the Mg/Ti interfaces which are not sufficiently strong to resist cracks initiation and propagation.

Automated summary

This study successfully achieved the simultaneous sintering of magnesium and titanium using a novel high-pressure solid-state sintering technique. The relationship between microstructure and mechanical properties of the sintered Mg-Ti composites was analyzed, and it was found that the plasticity of the composites decreases as the titanium content increases. Additionally, the compressive yield strength of the composites increases with titanium content.