Rods were deformed by equal channel angular pressing up to shear strains of γ ≈ 5 while applying various deformation paths A, BC and C. X-ray Bragg profile analyses, differential scanning calorimetry as well as residual electrical resistivity measurements were performed, in order to detect the densities of various deformation induced lattice defects and/or their arrangements. The results were analysed in terms of annealing of deformation induced dislocations and vacancies (vacancy agglomerates). Compared to conventional cold work procedures, deformation by equal channel angular pressing achieved a strongly enhanced concentration of vacancy-type defects.

Lattice Defect Investigation of ECAP-Cu by Means of X-Ray Line Profile Analysis, Calorimetry and Electrical Resistometry. E.Schafler, G.Steiner, E.Korznikova, M.Kerber, M.J.Zehetbauer: Materials Science and Engineering: A, 2005, 410-411, 169-73