Surface Roughening Mechanism of Polycrystalline Metal Sheet during Plastic Deformation : Effe

A surface roughening phenomenon was investigated using commercially pure aluminium sheets deformed plastically along various proportional strain paths. Surface profiles were measured in three directions of a major principal strainε1, a minor principal strain ε2 and 45 degrees toε1 direction. The mean value of Ra in the three directions could be expressed by the ..