Measurement of screw and edge dislocation density by means of X-ray Bragg profile analysis

摘要: Abstract The type of dislocations produced during plastic deformation is necessary to know for the fundamental understanding anisotropy hardening processes. By studying X-ray line broadening in several reflections, fraction certain dislocation types can be determined experimentally. contribution strain generally anisotropic. On basis model, modified Williamson–Hall and Warren–Averbach procedures have been suggested where g g2 are replaced by C , with as average contrast factor. evaluated theoretically different crystal systems types, i.e. edges and/or screws, numerical methods. other hand, analyzing from experiment. Comparing experimental theoretical C-values specific determined. In present paper this procedure has carried out fine grained Cu 99.9% well into stage III. ratio starts a high (90%) screw dislocations. During up e=0.3 picture changes favor edge (75%).