Friction and Wear of Aluminum Alloy Reinforced by TiO2 Particles

Sarajan, Zohair

doi:10.1007/s11223-013-9451-4

Cited by 2 publications

(2 citation statements)

References 26 publications

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“…Present oxygen element is due to the fact that wear test was done in an air environment, as reported by Sarajan [25]. Hence, the dominant wear mechanisms of the rheoformed composite parts at different semisolid stirring temperatures involve adhesive wear, abrasive wear and delamination wear.…”

Section: Influence Of Semisolid Stirring Temperature On Tribological mentioning

confidence: 92%

“…It was concluded that the volume loss of the composites fabricated by semisolid processing was lower than that of the composites fabricated by conventional casting. The friction and wear of the aluminum alloy reinforced by TiO 2 particles fabricated by semisolid stirring was mentioned by Sarajan [25]. The results showed that accumulated volume loss was significantly higher when wear debris was removed by camel brush during dry sliding wear.…”

Section: Introductionmentioning

confidence: 98%

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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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Section: Influence Of Semisolid Stirring Temperature On Tribological mentioning

confidence: 92%

Section: Introductionmentioning

confidence: 98%

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

Jiang

Xiao²,

Wang³

et al. 2018

Metals

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Effect of EMS Process on the Primary Si Refinement, Tensile and Fatigue Properties of Hyper-eutectic Al-15wt.%Si Alloy

Baek¹,

Kang²,

Kim³

et al. 2022

Korean J. Met. Mater.

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This study investigated the effect of the electromagnetic stirring (EMS) process on the microstructure and mechanical properties of hyper-eutectic Al-15 wt.%Si alloy. The tensile and high-cycle fatigue properties of the EMS Al-15wt.%Si alloy were examined and compared with conventional direct chill (DC) cast alloy. The initial microstructure of the as-cast DC alloy showed a coarse primary Si of 70 µm, in contrast to the size (40 µm) of the as-cast EMS alloy. The DC extruded alloy exhibited a massive primary Si size of 40~55 µm. In contrast, the EMS extruded alloy had a spherical primary Si with 30~40 µm sizes. The average grain sizes were measured to be 8.8 µm (EMS extruded alloy) and 11.4 µm (DC extruded alloy), respectively. The EMS process was confirmed to contribute to the refinement of the grain size and the primary Si size of the hyper-eutectic Al-Si alloy. The yield strengths at room temperature were measured to be 388.0 MPa (EMS extruded alloy) and 375.0 MPa (DC extruded alloy), and the tensile strengths were 426.0 MPa (EMS extruded alloy) and 412.4MPa (DC extruded alloy), respectively. The elongations of both alloys were similar at room temperature. The fatigue limit of the EMS extruded alloy (130 MPa) was higher than that of the DC extruded alloy (120 MPa). The EMS extruded alloy exhibited superior fatigue resistance compared to the DC extruded alloy, regardless of the cyclic stress condition. This study also discussed the potential value of the EMS process as a method for improving the properties of hyper-eutectic Al-Si alloy, as well as the deformation and fracture mechanisms of the EMS Al-15wt.%Si alloy.

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Friction and Wear of Aluminum Alloy Reinforced by TiO2 Particles

Cited by 2 publications

References 26 publications

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

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

Effect of EMS Process on the Primary Si Refinement, Tensile and Fatigue Properties of Hyper-eutectic Al-15wt.%Si Alloy

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