Microstructural and abrasive wear properties of SiC reinforced aluminum-based composite produced by compocasting

Mazahery, Ali; Shabani, Mohsen Ostad

doi:10.1016/s1003-6326(13)62676-x

Cited by 104 publications

(43 citation statements)

References 29 publications

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“…Suresha et al [24] reported that the Al/SiCp reinforced composites have higher strength and wear resistance than pure aluminium. Mazahery et al [25] found that the wear behaviour of AA6061 alloy at dry condition by reinforcing various sizes of SiCp micronsized particles in the matrix resulted in better wear resistance compared to the base material and better wear resistance is achieved with lower reinforcement particle size. Sivaiah et al [26] studied the wear behaviour of the AA5083/SiCp nanocomposites at dry condition and they revealed a significant improvement in specific wear rate compared to the base material.…”

Section: Introductionmentioning

confidence: 99%

Dry sliding wear behaviour of ultrasonically-processed AA6061/SiCp nanocomposites

Reddy¹,

Krishna²,

Rao³

2017

Int. J. Automot. Mech. Eng.

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The present study focused on the wear performance of AA6061/ SiCp (1, 1.5 and 2 wt. %) of nanocomposites at dry sliding condition. The nanocomposite specimens were fabricated through ultrasonic assisted stir casting technique. The wear experiments were conducted under normal atmospheric conditions using a pin-on-disc apparatus. Three different applied normal loads on nanocomposite pin (10 N, 15 N, and 20 N); at various sliding velocities of (1 m/s, 1.5 m/s, and 2 m/s); and at sliding distances of (1000 m, 2000 m, and 3000 m) were considered. The influences of applied normal load on nanocomposite pin, wt. % of SiCp reinforcement particles, sliding velocity, and sliding distance on both friction coefficient and wear loss were studied. The changes of wear loss and friction coefficient with varying applied normal loads, sliding velocities, and sliding distances were plotted. It was observed that the wear loss increased linearly with increasing sliding distance and sliding velocity. This was due to the increase of oxidation layer on the pin surface. The average friction coefficient at sliding velocity 1 m/s for 1 wt. % of SiCp, 1.5 wt. % of SiCp, and 2 wt. % of SiCp reinforced nanocomposites at sliding distance 3000 m, at 20 N normal loads was 0.29, 0.43, and 0.46, respectively. The average friction coefficient at 2 m/s sliding velocity for the same load and sliding distance was 0.26, 0.27, and 0.28, respectively. The increase of SiCp reinforcement in the matrix increased the friction coefficient due to its cubic crystal structure. The increase of sliding velocity and sliding distances reduced the friction coefficient. The worn surfaces of the samples were examined using SEM and EDX analyses. SEM micrograph analysis of the wear surfaces of the nanocomposites exhibited the abrasion wear and oxidative wear with severe plastic deformation. The shallower scratches, circular grooves, and deeper grooves were identified at different conditions on the worn surfaces.

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Section: Introductionmentioning

confidence: 99%

Dry sliding wear behaviour of ultrasonically-processed AA6061/SiCp nanocomposites

Reddy¹,

Krishna²,

Rao³

2017

Int. J. Automot. Mech. Eng.

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“…It was concluded that the friction coefficient decreased with increasing applied load and sliding velocity. Abrasive wear properties of SiC reinforced aluminum matrix composite produced by compocasting (i.e., casting of a stirred mixture of liquid aluminum and SiC particles) were studied [8]. The results revealed that the matrix hardness had a strong influence on the dry sliding wear behavior of the composite, and the lowest wear rate occurred in the composite with the lowest matrix hardness.…”

Section: Introductionmentioning

confidence: 97%

Tribological Behavior of Nano-Sized SiCp/7075 Composite Parts Formed by Semisolid Processing

Jiang

Xiao²,

Wang³

et al. 2018

Metals

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Abstract:The tribological behavior of the rheoformed and thixoformed nano-sized SiC p /7075 composite parts is investigated. The semisolid stirring temperature has a little influence on the friction coefficient and wear resistance of the rheoformed composite parts. As for the thixoformed composite parts, the average value of the steady-state coefficient of friction increases firstly and then decreases with increasing reheating temperature. Higher wear resistance is achieved at a reheating temperature of 580 • C. The average value of the steady-state friction coefficient of the rheoformed composite parts varies from 0.37 to 0.45 upon applied loads of from 20 to 50 N. Weight loss increases slightly upon an increase of applied load from 20 to 40 N. An applied load of 50 N leads to a significant increase of the weight loss. The wear rate decreases firstly and then increases with increasing applied load. As for the thixoformed composite part, the average value of the steady-state friction coefficient and the weight loss decreased with an increasing applied load. However, the wear rate decreases firstly with increasing applied load and then increases. As for the rheoformed composite part, the average value of the steady-state friction coefficient decreases firstly and then increases a little with increasing sliding velocity. Weight loss and wear rate show a first increase and a followed decrease with increasing sliding velocity. As for the thixoformed composite part, the average value of the steady-state friction coefficient shows a decrease with increasing sliding velocity. Weight loss and wear rate exhibit, at first, an increase, and then a decrease with increasing sliding velocity. The average friction coefficient varies from 0.4 to 0.44 with increasing volume fraction of SiC. Weight loss and wear rate decrease with increasing volume fraction of SiC. An increase in dislocation density around the nano-sized SiC particles and the mismatch of the coefficient of thermal expansion (CTE) between 7075 matrix and nano-sized SiC particles during solidification improve the wear resistance of the composite. The dominant wear mechanisms of the rheoformed and thixoformed composite parts are adhesive wear, abrasive wear and delamination wear.

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“…Result revealed that mechanical properties of MMCs were higher than unreinforced alloy [4].The tensile strength of Al/5 Vol. % of Silicon Carbide (SiC) composite fabricated by stir casting route was found high than the same composite fabricated by powder metallurgy technique [5].…”

Section: Introductionmentioning

confidence: 99%

Mechanical and Tribological Characteristics of TIG Hardfaced Dispersive Layer by Reinforced with Particles Extruded Aluminium

Dimitrova¹,

Kandeva²,

Kamburov³

2017

Tribol. Ind.

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Microstructural and abrasive wear properties of SiC reinforced aluminum-based composite produced by compocasting

Cited by 104 publications

References 29 publications

Dry sliding wear behaviour of ultrasonically-processed AA6061/SiCp nanocomposites

Dry sliding wear behaviour of ultrasonically-processed AA6061/SiCp nanocomposites

Tribological Behavior of Nano-Sized SiCp/7075 Composite Parts Formed by Semisolid Processing

Mechanical and Tribological Characteristics of TIG Hardfaced Dispersive Layer by Reinforced with Particles Extruded Aluminium

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