Nonuniformity of the strain distribution during creep and extension

A statistical method has been used for a quantitative study of the nonuniformity of the strain distribution during creep and static extension of polycrystalline aluminum (99.8%). During creep the nonuniformity of the strain distribution is controlled by elongation and, in contrast with the case of static extension, is nearly independent of the grain size, the temperature, and the stress. During creep the nonuniformity of the microscopic-strain distribution at large macroscopic-strain levels is more pronounced than during static extension.