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

1st International Conference on Recent Advances in Aerospace Engineering

航空航天工程

Joshua, K. John^1 ; Vijay, S.J.^2 ; Selvaraj, D. Philip^2 ; Ramkumar, P.^2

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

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

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/247/1/012011/pdf
DOI  :  10.1088/1757-899X/247/1/012011

学科分类：航空航天科学

来源: IOP

【 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.