Effect of Heat Treatment on Wear behavior of Hybrid Aluminum Metal Matrix Composites

Abstract

The focus of the paper is the wear behavior of hybrid aluminum metal matrix composites. The main objective of the investigation is to conduct the wear test at room temperature for both the as-cast and age hardening conditions. Materials chosen for the study are Aluminum 7075 as a matrix, Silicon Carbide and Alumina are the reinforcements. Hybrid metal matrix composites are produced by utilizing stir casting route for 5-15 wt.% silicon carbide and alumina. Microstructural characterization of hybrid aluminum metal matrix composites reveals the homogeneous mixing of reinforcements. It is noticed that the higher composite hardness is obtained due to the raise in weight percentage of the reinforcement up to 10% of hybrid reinforcements. In the T6 heat treatment, there is a gain in hardness by 24 % for optimum percentage of reinforcement i.e. 10 % compare with as-cast composites.

Generation of mechanically mixed layer during wear in hybrid aluminum MMC under as-cast and age hardened conditions

“…wear rate. It was observed that the volumetric wear rate decreased in heat treated hybrid aluminum metal matrix composites with increased SiC + Al 2 O 3 reinforcement and aging when compared with the base alloy the weight loss was decreased [23,24] in metal matrix composites. In hybrid aluminum metal matrix composites the weight loss was further reduced when compared with aged conditions.…”

“…Rajesh et al [4][5][6][7] conducted experimentations like hardness, wear behavior at as-cast and age hardened conditions etc. on aluminum hybrid metal matrix composites.…”

Fabrication, Characterization, and Impact of Heat Treatment on Sliding Wear Behaviour of Aluminium Metal Matrix Composites Reinforced with B4C

“…In an investigation, Rajesh et al [8,9] have analyzed the effect of reinforcing Al 2 O 3 and SiC on the wear behaviour of hybrid aluminium MMCs on a pin-on-disc tribometer. ey fabricated the composites by using the reinforcement SiC with 5%, 10%, and 15% weight and Al 2 O 3 with 5%, 10%, and 15% weight through stir casting.…”

“…Different investigators have taken different weight fractions of the reinforcement. Rajesh et al [9] have taken 5%, 10%, and 15% of the reinforcement. Fenghong et al [5] considered wt.…”

Material characterization of SiC and Al2O3–reinforced hybrid aluminum metal matrix composites on wear behavior

“…Results showed that impact strength and hardness increased with an increment in weight percentage of SiC. Rajesh and Kaleemulla [5][6][7] conducted experimentations such as hardness and wear behavior at as-cast and age hardened conditions on HAMMCs. The matrix material considered is Al7075, and the reinforcement material is SiC and Al 2 O 3 .…”