Herstellung und mechanische Eigenschaften großskaliger ultrafeinkörniger Bleche und Laminate aus Al-Legierungen und Stählen

Description

Due to their very small grain size of less than 1 μm, ultrafine-grained materials exhibit extraordinary mechanical properties. Besides a very high specific strength, they frequently show high elongation to failure, which is connected to an increased strain rate sensitivity. A very prominent method for production of ultrafine-grained materials is the Accumulative Roll Bonding (ARB) Process. In this work, the influence of upscaling the ARB process is investigated. Thus, large-scaled ultrafine-grained sheets and laminates are used for a direction dependent characterization of the mechanical properties, especially the strain rate sensitivity. Finally, in order to further optimize the mechanical properties, material specific adaptions in processing are investigated for different aluminum alloys and steels.