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Monotonic and Cyclic Deformation Behavior of MIG-CMT Welded and Heat-Treated Joints of Aluminum Cast and Wrought Alloys†
Article first published online: 20 JUL 2012
Copyright © 2012 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim
Advanced Engineering Materials
Volume 14, Issue 10, pages 873–880, October 2012
How to Cite
Kantehm, M., Söker, M., Krupp, U. and Michels, W. (2012), Monotonic and Cyclic Deformation Behavior of MIG-CMT Welded and Heat-Treated Joints of Aluminum Cast and Wrought Alloys. Adv. Eng. Mater., 14: 873–880. doi: 10.1002/adem.201100338
- Issue published online: 5 OCT 2012
- Article first published online: 20 JUL 2012
- Manuscript Accepted: 18 JUN 2012
- Manuscript Received: 14 DEC 2011
While the fatigue behavior of die cast aluminum as well as welded aluminum wrought alloys have been subject of several studies, no systematic work has been carried out on hybrid structures made as a combination of welded sand castings and wrought alloys. Aim of the present study is to correlate the monotonic and cyclic deformation behavior of thin sheet welded joints with the microstructure in the heat affected zone of the material combination sand cast EN AC-Al Si7Mg0.3 and wrought alloy EN AW-Al Si1MgMn (EN AW-6082). The metal sheets were welded using a metal inert gas cold metal transfer process under variation of the welding gap, the heat treatment parameters, as well as the surface finishes. It was demonstrated by Wöhler diagrams based on bending fatigue tests that the fatigue life could be increased for the welded and heat treated specimens as compared to the as-received cast specimens. By means of optical microscopy this effect was attributed to microstructural changes due to the optimized welding and heat treatment process. A detailed analysis of the mechanical tests was possible by the application of an optical 3D strain analysis.