Microstructure and wear of cast (Al-Si alloy)-graphite composites

Das, S.; Prasad, Somuri V.; Ramachandran, T.

doi:10.1016/0043-1648(89)90122-1

Cited by 162 publications

(81 citation statements)

References 9 publications

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“…Fine grained aluminium alloy was obtained which has better strength by inoculating the melt with MgFeSi powder which forms insoluble compound particles, thus helping to increase the rate of nucleation. In the MgFeSi modified Al-Si alloys, the growth of the Al-Si-Fe phase is cut short resulting in a large number of equiaxed Al grains formation assuming broomresembling structures different from cast without MgFeSi [14][15][16][17][18] as observed in the SEM image ( Figure 14).…”

Section: Influence Of Sand Permeability and Pouring Temperatures On Cmentioning

confidence: 99%

Effects of Moulding Sand Permeability and Pouring Temperatures on Properties of Cast 6061 Aluminium Alloy

Ajibola

Oloruntoba

Adewuyi

2015

International Journal of Metals

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Effects of moulding sand permeabilities prepared from the combinations of four proportions of coarse and fine particle size mixtures and pouring temperatures varied from 700, 750, and 800 (±10 ∘ C) were studied on the hardness, porosity, strength, and microstructure of cast aluminium pistons used in hydraulic brake master cylinder. Three sand moulds were prepared from each of the 80 : 20, 60 : 40, 40 : 60, and 20 : 80 ratios. The surfaces and microstructures of cast samples were examined using high resolution microscopic camera, metallurgical microscope with digital camera, and scanning electron microscope with EDX facilities. The best of the metallurgical properties were obtained from the combination of 80 : 20 coarse-fine sand ratio and 750 ± 10 ∘ C pouring temperature using as MgFeSi inoculant. An 8 : 25 ratio of coarse to fine grained eutectic aluminium alloy was obtained with enhanced metallographic properties. The cast alloy poured at 750 ± 1 ∘ C has a large number of fine grain formations assuming broom-resembling structures as shown in the 100 m size SEM image.

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Section: Influence Of Sand Permeability and Pouring Temperatures On Cmentioning

confidence: 99%

Effects of Moulding Sand Permeability and Pouring Temperatures on Properties of Cast 6061 Aluminium Alloy

Ajibola

Oloruntoba

Adewuyi

2015

International Journal of Metals

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“…The mechanical strength, hardness, and the microstructure of the aluminium cast could be improved by controlled melting, pouring temperature, and the solidification processes and proper management of other different controlling factors [9][10][11][12]. The pouring temperature for aluminium alloys usually ranges from 720 to 790 ∘ C, even though thin-section cast products can be poured at temperatures as high as 845 ∘ C as found in the literature [8].…”

Section: Introductionmentioning

confidence: 99%

Effect of MgFeSi Inoculant on Properties of Cast 6061 Al Alloy for Brake Master Piston Application

Ajibola

Oloruntoba

2015

Indian Journal of Materials Science

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The influence of varying amount of MgFeSi inoculant on properties of cast 6061 Al alloy for brake master piston application has been studied and reported in this paper. Cast samples were produced at three pouring temperatures (700, 750, and 800 ∘ C) with MgFeSi varied from 1 to 3%. Wear resistance tests were performed on cast alloy in brake oil. Wear resistance tests results were validated by nondestructive examinations using photomicroscopy, SEM, EDX, and XRD data. The addition of MgFeSi influenced both the mechanical (hardness, strength, and wear resistance) and metallurgical properties (microstructures) of the cast alloy. Al grains were more refined and yielded good strength properties. Inoculating the melt with MgFeSi forms insoluble compound particles and is responsible for grain refinement. The increased amount of MgFeSi from 1 to 3% improved the wear resistance of the cast piston under lubricating condition using brake oil.

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“…Number of attempts [3][4][5][6][7][8] has been made by researchers to study the variation in temperature of sliding surfaces. Subramanian 4) studied the temperature of sliding surfaces of Al-12%Si alloy, at different velocities (0.1-10 m/s) against different counter surfaces (die steel, copper alloy and aluminium alloy).…”

Section: Introductionmentioning

confidence: 99%

Interface Temperature under Dry Sliding Conditions

Dwivedi¹,

Sharma²,

Rajan³

2002

Mater. Trans.

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In present paper, the influence of sliding speed, contact load, sliding time and microstructure on interface temperature during the sliding of eutectic Al-Si alloy (LM13) and hypereutectic Al-Si alloy (LM28) has been investigated. Sliding test was conducted under dry sliding conditions against hardened steel En-32 counter surface over a range of sliding speed from 0.2 to 5.0 m/s and contact load from 10 N to 30 N. It was observed that the interface temperature is a function of contact load, sliding speed, microstructure and thermal softening characteristics of sliding metal. Heat treatment of LM28 alloy decreases frictional heating and hence interface-temperature, however that of LM13 alloy does not affect the interface temperature especially under severe sliding conditions. Wear of aluminium alloys has close relationship with interface temperature. There is a critical temperature for each alloy corresponding to transition from mild to severe wear. LM28 alloy shows higher value of the critical temperature than the LM13 alloy under identical alloy conditions.

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Microstructure and wear of cast (Al-Si alloy)-graphite composites

Cited by 162 publications

References 9 publications

Effects of Moulding Sand Permeability and Pouring Temperatures on Properties of Cast 6061 Aluminium Alloy

Effects of Moulding Sand Permeability and Pouring Temperatures on Properties of Cast 6061 Aluminium Alloy

Effect of MgFeSi Inoculant on Properties of Cast 6061 Al Alloy for Brake Master Piston Application

Interface Temperature under Dry Sliding Conditions

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