Beschreibung
In the manufacturing of massive components, demands such as weight reduction and increasing functional integration become more and more important. By combining different materials, for example high-strength steel and aluminium, hybrid massive components with specifically adapted properties for a required application behavior can be producd. The application behavior of hybrid components is especially influenced by its surface and subsurface properties, like e.g. residual stresses, surface roughness or material structure, which consequently determine the life span of such components. The previous machining process significantly influences these properties. The modifications of the above-mentioned subsurface properties (residual stresses and material structure) in the joining zone of hybrid components during deep rolling and longitudinal turning are analysed. In order to examine the influence of these properties on the life span of hybrid components, rotating bending tests and in situ scanning electron microscope (SEM) investigations during tensile tests are conducted. The investigations show that subsurface properties in the joining zone have a deep impact on the application behavior of hybrid components.
