Microstructure and Mechanical Properties of TiP/AM60 Composites

Abstract:

AM60 magnesium alloys reinforced with titanium particles (Ti_p) were prepared by semi-solid stirring assisted ultrasonic vibration at different stirring speeds. The microstructure results show that the grain size increases after adding Ti particles. The Al₈Mn₅ phase is precipitated at the interface of Ti particles, and the interface structure between Ti particles and Mg matrix is a coherent interface. The tensile test results show that the strength of Ti_P/AM60 composites is higher than that of the AM60 matrix. With increasing the stirring speed from 300 r/min to 900 r/min, the UTS and elongation both increase first and then decrease. The UTS and elongation of Ti_P/AM60 composites reach the maximum of 183 MPa and 14.3%, respectively, when the stirring speed is 600 r/min. The UTS is increased by 15% and elongation is increased by 51% compared with those of the AM60 matrix alloy.