Influence of Friction on Surface Asperity Flattening Process in Cold Uniaxial Planar Compression (CUPC)

Atomic force microscope and electron back-scattering diffraction measurement methods were used to study the effects of friction on surface asperity flattening and surface texture during the uniaxial planar compression of annealed aluminum alloy. With an increase in gauged reduction, surface asperity tended to be flattened. Friction could boost the surface asperity flattening process by reducing the flow stress in deformation. The development of surface asperity features demonstrated that friction can effectively hinder the development of the Goss orientation component {011} < 100 > and clearly promote the generation of brass orientation {011} < 100 > orientation. Regardless of whether the sample was compressed with lubricant or not, a few S orientation component {123} < 634 > formed in sample edge area.