A sufficiently general thermally activated mechanism for extension of dislocations in some preferential direction was proposed. This mechanism comprises a necessary step of dislocation transformations that lead to blocking. The reasons for blocking of different types of dislocations in different materials are diverse. A new concept was developed concerning the possibility of thermally activated...

1 Universidad Autonoma del Estado de Morelos, CIICAp, Av. Universidad 1001, 62209 Cuernavaca, Morelos, Mexico 2 Universidad Nacional Autonoma de Mexico, Instituto de Ciencias Fisicas, Av. Universidad s/n, 62210 Cuernavaca, Morelos, Mexico 3 Instituto de Investigaciones Electricas, Reforma 113, 62490 Cuernavaca, Morelos, Mexico 4 Corrosión y Protección (CyP), Buffon 46, 11590 Mexico City, DF, Me...