It has been suggested, on the basis of experimental results, that a surface roughening phenomenon would be generated as a result of relative differences of an amount of deformation in thickness size due to random orientations of crystallic grains in the sub-surface layer. A simulative analysis of surface roughening has been carried out using a theory of the plasticity of crystals, on the basis of a constant uni- axial tensile stress model of F. C. C. structure polycrystalline aggregate. It has been confirmed that the surface roughness and wavelength of the surface profiles simulated are qualitatively similar to the experimental results.
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