Scratch hardness and deformation maps for polycarbonate and polyethylene

摘要: This paper presents results obtained from the scratching of an ultrahigh molecular weight polyethylene (UHMWPE) and a polycarbonate (PC). The data are used to obtain various surface mechanical properties such as hardness also prevailing deformation mechanisms. Scratch reported for case rigid conical indenters tip included angles, bulk temperatures, scratch velocities, applied normal loads. Scanning electron microscopy (SEM) laser profilometry study damage mechanisms, assess topography surfaces after scratching. Deformation maps provided these polymers under different experimental conditions, which describe characteristics. In general, show both increasing decreasing trends values with variation cone angle, (4qW/ηd 2 ; where W is load, d width residual scratch, q characteristic contact parameter, ranges between 1 2). velocity, governs imposed strain rate, imparts effect on values, whereas higher temperature material decreases hardness. measured responses shown greatly depend upon kind mechanism prevalent during associated removal processes.