The relationship between polycrystal deformation and single-crystal deformation was studied in pure polycrystalline Cu which was deformed in tension. The dislocation microstructure was analyzed, for grains of various orientations, by means of transmission electron microscopy. Three types of microstructure were identified. A correlation was found, between microstructure and grain orientation, which agreed well with earlier observations of tensile-deformed Al polycrystals and Cu single crystals. The stress-strain curve of the Cu polycrystal was calculated, with good accuracy, from single-crystal data, which were weighted according to the volume fractions of the 3 different types; based on a quantitative texture measurement of the polycrystal.

Polycrystal Deformation and Single Crystal Deformation - Dislocation Structure and Flow Stress in Copper. X.Huang, A.Borrego, W.Pantleon: Materials Science and Engineering A, 2001, 319-321, 237-41