Effect of the primary heat treatment on the bond formation in cold welding of aluminum and steel by cold forging |
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Authors: | Peter Groche Simon Wohletz Andreas Erbe Abdulrahman Altin |
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Affiliation: | 1. Technische Universität Darmstadt, Institute for Production Engineering and Forming Machines, 64287 Darmstadt, Germany;2. Max-Planck-Institut für Eisenforschung GmbH, Department of Interface Chemistry and Surface Engineering, 40237 Düsseldorf, Germany |
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Abstract: | Cold forging enables the manufacturing of high strength monolithic components. When used as joining technology it can also be extended to an enabler of multi-material product design. The contact conditions at the interface between the components during the cold forging process play a crucial role. The joining of two billets of steel and aluminum is investigated by a finite element analysis with regard to the material distribution and the effect of a primary heat treatment of both materials. These parameters affect the surface enlargement and the contact normal stress which are decisive parameters for the formation of a sound bond between aluminum and the hardly cold weldable steel. The experimental results present the effect of a primary heat treatment on the bond formation. Microscopic analyses of the bond formation allow a deeper insight into the bonding mechanism. Thus, the results lead to process design guidelines for cold welding by cold forging. |
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Keywords: | Cold forging Cold welding Joining by forming Forge bonding Steel Aluminum |
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