BEHAVIOUR OF DUCTILE MATERIALS UNDER FRICTION, EXTRUSION AND CONCENTRATED LOAD ACTION

The behaviour of some ductile materials: brass, iron alloys and the model ionic single crystals (KCl and LiF) undergoing non-homogeneous external loading such as blow pressing (similar to extrusion), friction, dynamic macro- and quasi-static microindentation has been examined. Formation of the specific defect structure typical for all investigated materials has been detected. The theoretical concept of the strain rate intensity factor is applied to explain the regularities of creation of those deformed structures.