AN EVOLUTION MODEL OF DISLOCATION PATTERNS IN PLASTIC-DEFORMATION ANDITS APPLICATIONS

By combining the classic dislocation theory with the principle of diss ipative structure and synergetics, an evolution model of dislocation p atterns has been developed. Using this model, the evolution. of disloc ation patterns and the corresponding mechanical behavior have been ana lyzed, discussed and simulated under different deformation conditions of constant strain rate, creep and static recovery. As one of the most essential problems in the plastic deformation, the evolution of dislo cation patterns has been dealt with by using non-linear methods. Resul ts show that various problems in plastic deformation may be solved in a unified theoretical framework.