Investigation on mechanical properties and wear behaviour of titanium diboride reinforced composites

Abstract

Aluminium Metal Matrix Composites (AMMCs) are popular materials for aviation and automotive sectors due to their enhanced strength to weight ratio, increased resistance to corrosion and better tribological properties. In this work, the AA7075 alloy was reinforced with Titanium Boride (TiB2) particles (0, 4, 8, 12 wt. %) via stir casting process. In this process, the preheated TiB2 powder is dispersed into molten AA7075 at 850 to improve wettability and distribution. The tensile strength, hardness, wear resistance, and microstructural studies were conducted for the proposed composites. Pinon-Disc set up was used to study the wear behaviour of the proposed composites. The results revealed that the addition of TiB2 particulates to AL7075 matrix improved all the properties when compared to AL7075 matrix. Worn surface of the abraded surface was analysed using Scanning Electron Microscope.

Keywords

• aa7075
• metal matrix composites
• tib2
• stir casting
• corrosion
• properties