Sliding wear behaviour of Al-Si-Cu composites reinforced with SiC particles

Zou, Xiuliang; Miyahara, Hirofumi; Yamamoto, Kazuya; Ōgi, Keisaku

doi:10.1179/026708303225007997

Cited by 24 publications

(11 citation statements)

References 18 publications

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“…Such a result is consistent with the results of XRD and chemical analysis by earlier investigators. [9,10,18,19] Figures 3(a) and (b) show SEM micrographs of the Al20Si alloy extruded bars, with the particle sizes of Ͻ26 m and 45 to 106 m, respectively. It may be noted that the microstructure in Figure 3(a) is very fine due to the combination of initial fine powders and the severe plastic deformation experienced by them during the hot extrusion process.…”

Section: A Microstructure Of the Powders And Extruded Barsmentioning

confidence: 99%

Mechanical properties and fracture behavior of an ultrafine-grained Al-20 wt pct Si alloy

Hong

Suryanarayana

2005

Metall Mater Trans A

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The effect of powder particle size on the microstructure, mechanical properties, and fracture behavior of Al-20 wt pct Si alloy powders was studied in both the gas-atomized and extruded conditions. The microstructure of the as-atomized powders consisted of fine Si particles and that of the extruded bars showed a homogeneous distribution of fine eutectic Si and primary Si particles embedded in the Al matrix. The grain size of fcc-Al varied from 150 to 600 nm and the size of the eutectic Si and primary Si was about 100 to 200 nm in the extruded bars. The room-temperature tensile strength of the alloy with a powder size Ͻ26 m was 322 MPa, while for the coarser powder (45 to 106 m), it was 230 MPa. The tensile strength of the extruded bar from the fine powder (Ͻ26 m) was also higher than that of the Al-20 wt pct Si-3 wt pct Fe (powder size: 60 to 120 m) alloys. With decreasing powder size from 45 to 106 m to Ͻ26 m, the specific wear of all the alloys decreased significantly at all sliding speeds due to the higher strength achieved by ultrafine-grained constituent phases. The thickness of the deformed layer of the alloy from the coarse powder (10 m at 3.5 m/s) was larger on the worn surface in comparison to the bars from the fine powders (5 m at 3.5 m/s), attributed to the lower strength of the bars with coarse powders.

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Section: A Microstructure Of the Powders And Extruded Barsmentioning

confidence: 99%

Mechanical properties and fracture behavior of an ultrafine-grained Al-20 wt pct Si alloy

Hong

Suryanarayana

2005

Metall Mater Trans A

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“…The addition of reinforcements significantly improves the wear resistance of aluminium alloy. Zou et al [7] found that the wear resistance of composites is proportional to the volume fraction and average diameter of SiC particles (SiCp). The wear resistance of 38 vol% SiCp particle (average size 57 m) reinforced composite is almost 10 times higher than that of the SiCp (5.5 m) reinforced composite with the same volume fraction.…”

Section: Introductionmentioning

confidence: 99%

Influence of sliding speed on the dry sliding wear behaviour and the subsurface deformation on hybrid metal matrix composite

Basavarajappa

Chandramohan

Mahadevan

et al. 2007

Wear

253

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“…• the type of the matrix and counter body material and their hardness [6][7][8], • the type of the reinforcements, their shape, size and volume fraction [9][10][11] and • testing conditions (load, speed, temperature, type of relative motion, lubrication and environment) [12][13][14].…”

Section: Introductionmentioning

confidence: 99%

Microstructural and Tribological Properties of A356 Al–Si Alloy Reinforced with Al2O3 Particles

et al. 2008

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In the present study, the effect of the Al 2 O 3 particles (average size of 12 lm, 3 and 10 wt.%) reinforcement on the microstructure and tribological properties of Al-Si alloy (A356) was investigated. Composites were produced by applying compocasting process. Tribological properties of unreinforced alloy and composites were studied, using pin-on-disc tribometer, under dry sliding conditions at different specific loads and sliding speed of 1 m/s. Microhardness measurements, optical microscope and scanning electron microscope were used for microstructural characterization and investigation of worn surfaces and wear debris. During compocasting of A356 alloy, a transformation from a typical dendritic primary a phase to a non-dendritic rosette-like structure occurred. Composites exhibited better wear resistance compared with unreinforced alloy. Presence of 3 wt.% Al 2 O 3 particles in the composite material affected the wear resistance only at specific loads up to 1 MPa. The wear rate of composite with 10 wt.% Al 2 O 3 particles was nearly two order of the magnitude lower than the wear rate of the matrix alloy. Dominant wear mechanism for all materials was adhesion, with others mechanisms: oxidation, abrasion and delamination as minor ones.

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Sliding wear behaviour of Al-Si-Cu composites reinforced with SiC particles

Cited by 24 publications

References 18 publications

Mechanical properties and fracture behavior of an ultrafine-grained Al-20 wt pct Si alloy

Mechanical properties and fracture behavior of an ultrafine-grained Al-20 wt pct Si alloy

Influence of sliding speed on the dry sliding wear behaviour and the subsurface deformation on hybrid metal matrix composite

Microstructural and Tribological Properties of A356 Al–Si Alloy Reinforced with Al2O3 Particles

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