Influence of micro Ti particles on resistance to cavitation erosion of Mg-xTi composites

Abstract

Magnesium-titanium composites with different content of titanium micro particles were produced using disintegrated melt deposition (DMD) technique. The measurements of porosity and hardness as well as cavitation erosion resistance of Mg-xTi composites were performed. In order to detect phase composition, X-ray diffraction studies were performed. In all composites, α-Mg and α -Ti phases were detected and no interfacial reactions between the matrix and reinforcement were observed. Porosity of the composites increased with increasing content of Ti particles. The lowest porosity was observed in Mg-2.5Ti composite, while the highest in Mg–15Ti composite. While all composites underwent strain-hardening comparable to that of pure Mg after 5 min of cavitation erosion testing, the best cavitation resistance was demonstrated by Mg-2.5Ti composite, while the lowest was demonstrated by Mg–15Ti composite. Degradation of Mg-xTi composites occurred as a result of the development of cracks at the interface between Ti particles and Mg matrix.