Tribological behaviour of cast hypereutectic Al–Si–Cu alloy subjected to sliding wear

Effect of extrusion ratio on the wear behaviour of Al–Si and Al–Mg alloys

“…4A and C that the grains of the Al-Si alloy extruded at the ratio of 2 are elongated more than the ones in the Al-Mg alloy. It proves that Si, as the alloying element, increases its ductility in the aluminium alloy and grains elongate more; additionally, it is proved that the formability of the Al-Si alloy is better than the Al-Mg alloy [39,8,40]. Table 2 illustrates the results of the microhardness test (HMV) conducted using a 50 g load for as-cast and extruded Al-Si and Al-Mg alloys.…”

“…EDS analyses show the traces of Al, Si, Fe, Cr and O peaks on the worn surface. While Al, Si and Mg elements were already present in the worn material, Fe and Cr were transferred over from the counter material [8,40]. EDS analyses show an oxygen peak caused by the iron oxide formed as a result of the Fe reacting with the oxygen in the atmosphere [6].…”

“…It indicates that alloys containing less than 5% Mg have lower wear resistance [21]. Various studies in the literature show that adding silicon to aluminium alloys increases their wear resistance [39,8]. …”

“…Of the aluminium-based alloys, aluminium-silicon alloys are probably the most investigated ones for their tribological behaviour [3][4][5][6][7][8]. In recent years, aluminium-magnesium alloys have been very attractive in the applications for the automotive, railway and aerospace industries from an ecological point of view.…”

Dry Sliding Friction and Wear Behaviour of an Electron Beam Melted Hypereutectic Al–Si Alloy

“…Interest in the use of hypereutectic aluminium-silicon alloys as materials for automotive die cast crankcase blocks continues [1][2][3][4][5][6][7] due to the significant environmental and fuel efficiency benefits resulting from the relatively low density of aluminium [8,9]. For surfaces exposed to tribological contacts such as the cylinder wall surface, exposure of the primary silicon colonies through chemical etching [10,11] or mechanical differential abrasion is necessary to prevent galling of the a-aluminium phase as a result of contact with the piston ring, especially during the running-in phase of operation [12,13].…”