Dry sliding wear behavior of Al 6082 metal matrix composites reinforced with red mud particles

Abstract

The present study aims at investigating the dry sliding wear behavior of Al-based 6082 metal matrix composites (AMMCs) reinforced with red mud particles by pin-on-disc configuration. AMMCs were fabricated with three different weight fractions of red mud particles ranging from 2 to 6% by using the stir-casting method. The friction coefficients and volumetric wear rates were continuously evaluated under normal loads of 10-30 N and sliding speed of 1.5 m s −1 for the constant sliding distance of 1000 m. Microstructural analysis indicated that red mud particles are more or less uniformly dispersed throughout the Al matrix with minimal agglomeration. Experimental data shows that microhardness and tensile strengths of both the as-cast and heat-treated composites are steadily improved by increasing the amount of reinforced red mud particles but at the cost of ductility. Analysis of worn surfaces revealed that delamination and abrasion are dominant wear mechanisms for the case of the heat-treated composites are whereas the adhesion wear mechanism for the base alloy. The composite containing 4% red mud particles experienced the lowest wear rate at a normal load of 30 N and sliding speed of 1.5 m s −1 as compared to other composites including the base alloy. While the composite with 2% red mud particles shows the lowest friction coefficient, base alloy exhibited the highest friction coefficient.

Experimental Investigation on Tribological Behaviour of AA6066: HSS-Cu Hybrid Composite in Dry Sliding Condition

“…e specimens were collected and cleaned manually, and then the specimens were visually inspected. e damaged and cracked specimens were rejected, and the specimens with a clear surface and without defects were selected for the investigation [29][30][31]. en, the prepared composite specimen was named as AAHSS Cu based on the combinations of all the materials used in the composite.…”

Mechanical Properties of Sustainable Metal Matrix Composites: A Review on the Role of Green Reinforcements and Processing Methods

“…The uniform distribution of red mud particles increased the Vickers hardness (an increase from 80.3 to 92.1 HV and 88.4 to 104.3 HV), and tensile strength values (Table 8) in both the as cast and heat-treated conditions. Under dry sliding tribological test conditions, wear resistance increased due to red mud particle addition [21]. Delamination and abrasion were the dominant wear mechanisms.…”

A critical review on tribological properties, thermal behavior, and different applications of industrial waste reinforcement for composites

“…The SEM analysis of worn surfaces depicts that at higher content of RM ploughing is more dominant, and third body abrasion takes place that enhances the coefficient of friction while the wear resistance also increases due to more abrasion resistance with improved load-carrying ability. 71 Singh and Chauhan analyzed the friction and wear characteristics of SiC and RM (5, 10, 15, 20 wt %)-filled Al alloy composites fabricated using stir casting. The wear resistance is higher when reinforcement is added due to the formation of hard and resistant layer on the wear surface of composites and reduced frictional coefficient is achieved owing to lower fictional contact between sliding surfaces.…”

“…The SEM analysis of worn surfaces depicts that at higher content of RM ploughing is more dominant, and third body abrasion takes place that enhances the coefficient of friction while the wear resistance also increases due to more abrasion resistance with improved load-carrying ability. 71…”