Calculation of plastic strain ratio of AA1050 Al alloy sheet processed by heavy asymmetric rolling-annealing followed by light rolling-annealing

Abstract

A study has been made of the texture evolution and the plastic strain ratios (the R-values) of AA1050 Al alloy sheets which were subjected to heavy asymmetric rolling-annealing followed by light rolling-annealing to improve the deep drawability of the Al alloy sheets. The heavily rolled Al alloy sheet evolved a shear texture consisting of {001}< 110 > and ND//< 111 >. The R-values of the heavily rolled (90%) and annealed Al alloy sheets were measured and calculated from the measured sheet textures using the Bunge method. The calculated R-values were in good agreement with the measured data. A light rolling by 20% and annealing at 400 degrees C following the heavy rolling-annealing decreased the rotate cube texture component, {001}< 110 >, of the sheet texture and in turn increased the ND//< 111 > component and gave rise to the highest average R-value ((R) over bar) and the lowest vertical bar Delta R vertical bar value. The calculated (R) over bar and vertical bar Delta R vertical bar values were in fairly good agreement with the measured data. (C) 2014 Elsevier B.V. All rights reserved.