| Abstract: |
In many industrial sectors, for example aerospace, automotive and high performance electronic industries, is a significant requirement to join dissimilar materials. In case of medium strength aluminum alloys, the joints are commonly manufactured using Al-Si brazing fillers with a melting temperature of 575°C. In comparison to medium strength aluminum alloys, high strength aluminum alloys exhibit lower melting temperatures. Therefore, the joining possibilities are limited. Due to the lower melting temperature of about 500°C, the developed brazing filler based on the ternary eutectic system Al Ag Cu allows the joining of these alloys. The high-strength aluminum alloys/stainless steel joints are produced by induction brazing and vacuum furnace brazing. The induction brazing process ensures the suppression of thermodynamically stable intermetallic phases. Vacuum furnace brazing leads to a good homogenization of the joints. The mechanical properties of the joints are determined by tensile shear tests at ambient temperature. The microstructure of the brazed joints and the fracture surfaces of the tested samples are investigated by SEM. The results of the brazing experiments as well as tensile shear tests are described and discussed.
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