Orientation dependence of stored energy of cold work in 50% cold rolled copper

Abstract

When a metal is deformed cold, a small fraction of the energy expended in its deformation is stored in the crystal lattice associated with crystal defects and their elastic strain fields. There is evidence that grains having different orientations store different amounts of strain energy, although the data available are restricted to just a few grain orientations or are averages over a zone of orientations. A method is described which allows a more complete measurement of the orientation dependence of the stored strain energy of cold work, and is illustrated for the case of 50% cold rolled copper.