Abstract
conditions. The material behavior of four quenched and tempered steels was investigated to determine the different response to some loading conditions. An elevation of strain rate can change the fracture behavior completely. While static loading leads to plastic deformation without fracture, one can find spontaneous failure in impact loading due to adiabatic shear phenomena. Furthermore there is a significant influence of a triaxial-stress-concentration to the ductility of a material. The influence of stress concentration on ductility changes strongly with the materials. In many applications the demand for a high resistance in direction of plate-thickness is important. At one-dimensional loading often an crease of strength and ductility occurs, but by stress-concentration always a decrease in ductility appears. With the presented material test methods a definite differentiation of the material behavior regarding strength, ductility and toughness was found. The results present a solid basis for a successful material choice and a necessary quality assurance, especially for impact conditions.
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