Dry sliding wear behaviour of AA6082-T6/SiC/B₄C hybrid metal matrix composites using response surface methodology

Abstract

In the present work, dry sliding wear behaviour of hybrid aluminum metal matrix composites is carried out. A mixture of silicon carbide and boron carbide is used in equal fraction as reinforcement with base material AA6082-T6 to prepare AA6082-T6/SiC/B 4 C hybrid metal matrix composites using stir casting technique. The weight percentage of silicon carbide and boron carbide mixture taken to prepare hybrid composites is 5, 10, 15 and 20. The wear behaviour of Al-SiC-B 4 C composites is investigated using a pin-on-disc apparatus at room temperature, and optimization of process parameters is done using response surface methodology. The weight percentage of reinforcement, sliding speed, load and sliding distance are selected as process parameters with five levels of each. Analysis of variance shows that wear increases with increase of load or sliding distance and decreases with an increase in reinforcement or sliding speed. The experimental results revealed that the wear of Al-SiC-B 4 C hybrid composites has been influenced most by the sliding distance and least by weight percentage of reinforcement. The interaction between load-sliding speed is the only significant two-factor interaction in the present model which increases wear rate in fabricated hybrid composites. Further, the experimental results obtained are verified by conducting confirmation tests, and the errors found are within 3 to 7%.

Investigation of graphite effect on the mechanical and tribological properties of Al 7075-SiC-graphite hybrid metal matrix composites

“…But SiC and Alumina are mostly utilized compared to other synthetic reinforcing particulates. Mostly all researches are focussing on improving the wear resistance of the aluminium alloy and amongst the various ceramic particles SiC is used with many materials and resulted in enhanced wear resistance [3,11,15]. SiC particulates reinforced AMCs are well-known for high strength and wear resistance compared to traditional alloys [4,16].…”

Experimental Investigation, Modeling, and Optimization of Wear Parameters of B4C and Fly-Ash Reinforced Aluminum Hybrid Composite

“…The dry sliding wear test was performed using a Pin on Disc test rig (Model: TR-20LE-PHM400-LHM600) with the disc material EN31 steel of hardness 860 HV and initial surface roughness of 0.1 Ra (micrometers) [70]. In this investigation, the specific wear rate was selected as the wear response parameter.…”

“…Whereas, load, sliding speed, and sliding distance were chosen as input parameters [58,71,72]. The sliding wear parameters range were selected as load: 10-50 N; sliding distance: 500-1,500 m; sliding speed: 0.5-1.5 m/s, based on previous literature [29,39,44,58,70,73]. Further, five levels of each factor were calculated as per the central composite design based on the rotability value (α = 1.682), which was obtained using Minitab 19 software (detailed discussion in experimental design section) [62,73,74].…”

“…The dry sliding wear tests of the pin were carried out at loads of 10, 18, 30, 42, and 50 N, at sliding speeds of 0.5, 0.7, 1.0, 1.3, and 1.5 m/s, and sliding distances of 500, 703, 1,000, 1,297, and 1,500 m, as per the experimental design matrix shown in 30-35 • C and a relative humidity of 25-35% in the unlubricated condition of the specimen/disc interface [70]. Initially, the mass of the sample had been measured by the weighing machine with the least count of 0.0001 g. The track diameters were adjusted to 130 mm.…”

Parametric study on the dry sliding wear behaviour of AA6082–T6/TiB2 in situ composites using response surface methodology

“…As was expected, the hardness of the in situ composites increased with the increase in wt% of TiB 2 , which can be attributed to the inclusion of hard ceramic particles in the matrix which contributes towards resisting plastic deformation, thus leading to higher hardness. The more the addition of ceramic particles, the higher was the hardness [25]. The hardness of the composites reinforced with 3, 6, 9 and Microhardness (HV) Fig.…”