Influence of MgO particles on Microstructural and Mechanical Behaviour of AA7068 Metal Matrix Composites

[摘要] Present work deals with the fabrication of AA7068 metal matrix composites reinforced with different weight percentages of MgO (0%, 1%, 2%, and 5%) produced using powder metallurgy route. A low pressure of 318 MPa was applied for compacting the composites and sintered at a temperature of 560°C for one hour. Optical microscopy was done to study the microstructural behavior. Wear test has been conducted for a sliding distance of 3 km with a sliding velocity of 1.2 m/s of load 5N.,7.5N and 10N. Vickers micro hardness test has been conducted and the maximum value of 68 VHN was obtained by adding a weight percentage of 5% MgO particles. The wear resistance has been improved by adding MgO particles in the matrix material. EDAX analysis was done to ensure the presence of MgO particles.

[发布机构] Research Scholar Department of Mechanical Engineering, Karunya University, Coimbatore, Tamil Nadu; 641114, India^1;Department of Mechanical Engineering, Karunya University, Coimbatore, Tamil Nadu; 6411114, India^2

[学科分类] 航空航天科学

[关键词] Low pressures;Matrix materials;Mechanical behaviour;Micro-structural;Sliding distances;Sliding velocities;Vickers microhardness;Weight percentages