Topographical features observed in a scanning electron microscopy study of aluminium alloy surfaces in sliding wear

Microstructure and wear properties of aluminum/aluminum–silicon composite coatings prepared by cold spraying

“…Several wear particles show corrugated and layered structure. This is similar to the 'roof top laminate' morphology observed on the pin surface of Al-Si alloys in pin-on-disc experiments [26]. The inset shows the high magnification image of the laminate.…”

A generic model for dry sliding wear of metals at elevated temperatures

“…At the same time, the frictional forces move the maximum shear stress in the contact region towards the wear surface. Such microcracks initiating from the rubbing surface have indeed been observed by Clarke and Sarkar [33]. On such dynamically formed surfaces, troughs between rough asperities can act as existing crack nuclei or, at least, as stress-concentrators.…”

Ultra-mild wear of a hypereutectic Al–18.5wt.% Si alloy

“…In the past, extensive laboratory scale studies have been conducted to understand wear characteristics of Al-Si alloys. However, virtually all the previous wear tests, aimed at investigating sliding wear behaviour of Al-Si alloys, corresponded either to the mild wear regime (wear rates of 10 −4 to 10 −3 mm 3 /m) and/or the severe wear regime (≥10 −2 mm 3 /m) [1][2][3][4][5][6][7]. On the other hand, Al-Si alloys that are expected to be used for extended durability applications involving sliding contact, like the piston-cylinder block assembly in automotive engines, must operate under the conditions of ultra-mild wear (UMW).…”