Dynamic dislocation drag near to a point of martensitic transformation.pdfVIP

Dynamic dislocation drag near to a point of martensitic transformation V.N.Dumachev∗ Voronezh Militia Institute, Russia S.I.Moiseev and V.N.Nechaev 0 Voronezh State Technical University, Russia 0 0 The influence of coherent interface on dissipations of mechanical energy of driven dislocations near 2 to a point of martensite type phase transition is considered. The expressions for dynamic braking of dislocations, owing to losses of energy on excitation of deformations-type phase transition are c received. e D 5 Intensive experimental and theoretical study of dislocations dynamics [1-3] has resulted in creation of correct ] classification of mechanisms of energy dissipations of dislocation which drives in isotropic body [4-7]. In the same time i the questions connected to dynamic braking dislocations in a crystal containing dot defects were considered [8,9]. It is c s known, that on plastic and relaxations property of materials, essential influence renders domain structure: its static l- and dynamic characteristics. Constructed in works [10-11] the dynamic theory of coherent interphase boundaries r allows at a qualitatively new level to consider questions of interaction of elastic fields created by dislocations and t m domain walls. . In present work the dynamic braking of dislocations in a crystal with coherent interphase boundaries is investigated. t a As against earlier works on this theme, self-consistent dynamic theory of interface here is used, considering them as m independent objects, which have of internal deg