| Popis: |
Laser joining of dissimilar materials is one of the core competences of BIAS and is from interest focusing new design concepts for weight savings in different fields in automotive and aeronautic industry. Beside the development of joining techniques for thin aluminum-steel sheets, the joining of thicker material is of interest. Therefore specific processes have to be developed which allow dissimilar joints with small intermetallic phases. By using a hybrid process (Nd:YAG-Laser+MIG), a gap tolerant joining of aluminum-steel joints with a thickness of 3–4 mm, in butt-joint configuration is possible. Furthermore, the developed process allows a flux free joining of these dissimilar material combinations. For the characterization of the joining zone microstructural examinations have been carried out by optical and electron microscopy as well as electron backscattered diffraction analyses. Additionally, results from mechanical examinations like tensile and fatigue tests will be reported.Laser joining of dissimilar materials is one of the core competences of BIAS and is from interest focusing new design concepts for weight savings in different fields in automotive and aeronautic industry. Beside the development of joining techniques for thin aluminum-steel sheets, the joining of thicker material is of interest. Therefore specific processes have to be developed which allow dissimilar joints with small intermetallic phases. By using a hybrid process (Nd:YAG-Laser+MIG), a gap tolerant joining of aluminum-steel joints with a thickness of 3–4 mm, in butt-joint configuration is possible. Furthermore, the developed process allows a flux free joining of these dissimilar material combinations. For the characterization of the joining zone microstructural examinations have been carried out by optical and electron microscopy as well as electron backscattered diffraction analyses. Additionally, results from mechanical examinations like tensile and fatigue tests will be reported. |
