Mechanical and wear performance of Al/SiC surface composite prepared through friction stir processing

Abstract

In the present research work, AA7075 composite reinforced with silicon carbide particles has been fabricated using Friction stir processing (FSP). The silicon carbide particles having a size of 40 μm were placed in grooves of length 160 mm, width 2 mm, depth 3.5 mm, that were generated on the AA7075 plate. The square pin tool is utilized for fabricating the composite at two different rotational speed i.e. 700 and 1000 rpm. Effect of processing, particle addition and tool rotational speed is analyzed on mechanical and wear properties of the material. On friction stir processing the microhardness value and elongation of the material increased. Reinforcement addition contributed to decrease in ductility and tensile strength while on the contrary microhardness and wear resistance of the material improved. Tool rotational speed showed a direct relation with the tested mechanical and wear properties. Adhesive wear was the prominent wear mechanism and Fe layer formation was observed on the worn surface, contributing to increased wear resistance. These fabricated composites can find vast application in industries like automotive, defence and aerospace.

Evaluation of microhardness and wear properties of Al 6063 composite reinforced with yttrium oxide using stir casting process

“…The microstructure is finer when the volume fraction of the reinforcement particle is more (Pazhouhanfar and Eghbali, 2018). From Figure 5, it is evident that the wear rate decreases with increasing particulate content; this decrease might be attributed to an increase in these sample’s microhardness (Butola et al , 2021).…”

Influence of thermal and pH cycles on surface characteristics lithium disilicate glass-ceramic dental crowns milled with CAD/CAM process

“…In basic pH conditions, OH − anions plus H 2 O assaults the SiO 2 lavished glass matrix persuading the depolymerization cycle at the glass conformation. Hence, ceaseless disintegration can bring about dissolving the silicate matrix, with the consequent vanishing of the unique glass surface (Varshneya, 2013;Butola et al,2019Butola et al, , 2020Butola et al, , 2021. Previous in vitro studies suggested that surface erosion is a function of time, temperature, and pH (Xia et al, 2014;Bernhardt, 1941;Oyafuso et al, 2008;Gale and Darvell, 1999).…”

Tribological and mechanical characterization of as-cast and thermal treated Al-9Si/SiC graded composite

“…It was inferred from the previous statistical studies that applied load is comparatively a more influential tribological factor during nonlubricated sliding. [55][56] At applied minimal load of 15 N, outer layer of thermal treated FGMMC exhibits superior wear response (0.0001 mm 3 /Nm), when compared to the outer layer (0.000,119 mm 3 /Nm) of as-cast FGMMC. At 55 N, outer layer of thermal treated FGMMC exhibits lower wear response (0.00,024 mm 3 /Nm) compared to all other layers of both conditions (as-cast/thermal treated).…”