RETRACTED: Dry sliding wear behaviour of cast high strength aluminium alloy (Al–Zn–Mg) and hard particle composites

Rao, R.N.; Das, Sarmistha; Mondal, D.P.; Dixit, Gajendra

doi:10.1016/j.wear.2009.06.034

Cited by 110 publications

(41 citation statements)

References 24 publications

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“…The lower friction coefficient was obtained at a large amount of sliding velocities and at higher sliding distances [38]. The variation of the friction coefficient was low because of the formation of the oxide layer on the worn surfaces at higher normal loads and sliding velocities [20].…”

Section: Effect Of Sliding Velocity On Coefficient Of Frictionmentioning

confidence: 89%

“…Goudarzi et al [19] revealed that the addition of SiCp nanoparticles improved the wear resistance compared to micron size SiCp reinforcements in the aluminium matrix because the crack initiators are fewer in the case of nanoparticle reinforced composites compared to micron size particle reinforced composites. Rao et al [20] investigated wear behaviour of the aluminium alloy (Al-Zn-Mg)/SiCp composites at dry condition and reported that the wear properties and strength are better than that of base alloy. Similar studies in dry sliding condition on AA7010/SiCp, AA7009/SiCp, AA2024/SiCp and (AlCu-Mg)/SiCp composites exhibited that the wear resistance was significantly higher than that of the base material [21,22].…”

Section: Introductionmentioning

confidence: 99%

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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: Effect Of Sliding Velocity On Coefficient Of Frictionmentioning

confidence: 89%

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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“…However, their applications are restricted because of their poor wear resistance [1][2][3][4][5]. Particulate reinforced aluminum matrix composites are being considered for their superior mechanical and tribological properties over the conventional aluminum alloys, and therefore, these composites have gained extensive applications in automotive and aerospace industries [3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18][19].…”

Section: Introductionmentioning

confidence: 99%

“…The incorporation of hard reinforcing particles into the matrix alloys improve their mechanical and tribological behavior, but may result in deteriorated machinability together with rapid counterface wear [5, 6, 12-16, 24, 30]. To overcome the above mentioned problems, hybrid composites containing both hard and solid lubricant materials with improved tribological properties have been developed [2,3,6,10,15,21,26,30].…”

Section: Introductionmentioning

confidence: 99%

Effect of the Graphite Content on the Tribological Behavior of Al/Gr and Al/30SiC/Gr Composites Processed by In Situ Powder Metallurgy (IPM) Method

2011

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The influence of graphite content on the dry sliding wear characteristics of Al6061/Gr composites along with Al6061/30SiC/Gr hybrid composites has been assessed using a pin-on-disc wear test. The composites with different volume fraction of graphite particles up to 13% were processed by in situ powder metallurgy (IPM) technique. The porosity and hardness of the resultant composites were also examined. It was found that an increase in the graphite content reduced the porosity, hardness, and friction coefficient of both types of composites. The hybrid composites were more porous and exhibited higher hardness and lower coefficient of friction at identical graphite contents. The increased graphite content in the range of 0-13 vol.% resulted in increased wear rate of Al/Gr composites. The Al/30SiC composite exhibited a lower wear rate as compared with the base alloy and graphite addition up to 9 vol.% improved the wear resistance of these hybrid composites. However, more graphite particles addition resulted in increased wear rate. SEM micrographs revealed that the wear mechanism was changed from mostly adhesive in the base alloy sample (Al/0Gr) to the prominently abrasive and delamination wear for Al/Gr and Al/SiC/Gr/ composites.

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“…The uniformity of distribution of SiC in the alloy was confirmed by macroscopic and microscopic examination of the composites. Rao et al (2009) synthesized Al-Zn-Mg-SiCp composite by solidification processing (stir casting) route which involved melting the alloy, addition of preheated SiC particles and thorough mixing. Then, the slurry was poured into the mould and allowed to cool.…”

Section: Fabrication Of Aluminium MMCmentioning

confidence: 99%

Fabrication and heat treatment of ceramic-reinforced aluminium matrix composites - a review

Das

Mishra

Singh

et al. 2014

Int J Mech Mater Eng

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Ceramic-reinforced aluminium matrix composites have attracted considerable attention in engineering applications as a result of their relatively low costs and characteristic isotropic properties. Reinforcement materials include carbides, nitrides and oxides. In an effort to achieve optimality in structure and properties of ceramic-reinforced metal matrix composites (MMCs), various fabrication and heat treatment techniques have evolved over the last 20 years. In this paper, the status of the research and development in fabrication and heat treatment techniques of ceramic-reinforced aluminium matrix composites is reviewed, with a major focus on material systems in terms of chemical compositions, weight or volume fraction, particle size of reinforcement, fabrication methods and heat treatment procedures. Various optical measurement techniques used by the researchers are highlighted. Also, limitations and needs of the technique in composite fabrication are presented in the literature. The full potential of various methods for fabricating ceramic-reinforced aluminium matrix composites is yet to be explored.

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RETRACTED: Dry sliding wear behaviour of cast high strength aluminium alloy (Al–Zn–Mg) and hard particle composites

Cited by 110 publications

References 24 publications

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

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

Effect of the Graphite Content on the Tribological Behavior of Al/Gr and Al/30SiC/Gr Composites Processed by In Situ Powder Metallurgy (IPM) Method

Fabrication and heat treatment of ceramic-reinforced aluminium matrix composites - a review

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