Texture Evolution of Nanocrystalline Nickel during Pack Rolling

摘要

The texture evolution of electrodeposited nanocrystalline nickel with an initial grain size of 20 nm during pack rolling is quantitatively investigated. For both the roll-bonding side and non-roll-bonding side, the volume fractions of {001} and {001} components decrease with increasing equivalent strain, whereas those of {110}, {110}, {112}, and {123} components increase. This phenomenon is different from the texture evolution of conventional single-sheet rolled nanocrystalline nickel. However, the roll-bonding side and non-roll-bonding side behave quite differently. The deformation texture in the roll-bonding side at a high strain is characterized by the presence of strong {110}, {110}, {112}, and {123} and components, whereas a significant decrease in the {001} and {001} components. A cubic component having a volume fraction of 8% remains found in the non-roll-bonding side for the sample deformed to the largest strain of ε_VM=0.611. Detailed analysis suggests such a remnant of the original cube component can be primarily attributed to partial dislocation slip and grain coarsening.