The tensile behavior and deformation microstructure of cryo-rolled and annealed pure nickel

The deformation microstructures of room temperature and cryo-rolled commercially pure nickel to a thickness reduction of 95% were studied by transmission electron microscopy (TEM). Lamellar boundary spacings and boundary misorientations were measured and analyzed. It was found that the only difference between these two microstructures was boundary spacing. After annealed under different annealing conditions, the tensile behaviors of rolled and annealed pure nickel were studied. It was found that the higher the strength after annealing, the lower the ductility. The combination of high strength and high ductility behavior found in copper by cryo-rolling and annealing was not found in the present research.