Strain effects on the coarsening and softening of electrodeposited nanocrystalline Ni subjected to high pressure torsion

The softening of electrodeposited nanocrystalline nickel due to grain coarsening caused by high pressure torsion at room temperature was studied. The extent of coarsening and softening increases with increasing applied strains, indicating that large strains and high stresses are required to induce grain growth in nanocrystalline metals.