Analyze of combined effect of inhomogeneous plastic strain-induced and anisotropy on frictional behavior of cold-rolled steels

Abstract

The aim of this research work is to simultaneously evaluate the effects of inhomogeneous plastic strain-induced and anisotropy on frictional behavior. The studied material is the cold-rolled steel grade DC06EK intended for sheet metal forming. To achieve this work, stretched and unstretched DC06EK strips following different rolling directions (0°, 45° and 90°) with different levels of equivalent plastic strain were used in microscratch tests. The findings show that the calculated coefficient of friction (COF) decreases as a function of the equivalent plastic strain for different rolling directions. The COF have a clear trend lines of regression except in the case for 45°. Trend lines of the COF following 0° and 90° converge to very closely values, since the effect of anisotropy disappears with the increase in the level of plastic strain.