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Microstructure and Corrosion Properties of the Plasma-MIG Welded AA5754 Automotive Alloy
The Libyan Petroleum Institute, Tripoli, Libya
School of Materials, The University of Manchester, Manchester, UK
School of Materials, The University of Manchester, Manchester, UK
Innoval Technology Limited, Banbury, UK
- 1 The Libyan Petroleum Institute, Tripoli, Libya
- 2 School of Materials, The University of Manchester, Manchester, UK
- 3 School of Materials, The University of Manchester, Manchester, UK
- 4 Innoval Technology Limited, Banbury, UK
Journal of Minerals and Materials Characterization and Engineering·Volume 03 (2015)·Pages 318–325·Published 29 May 2015·DOI10.4236/jmmce.2015.34034
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Abstract
The influence of heating cycles during plasma metal inert gas (MIG) welding on the microstructure and corrosion properties of the AA5754 automotive alloy has been investigated. The high heat input during plasma-MIG welding results in a significant modification in the microstructure of the AA5754 alloy adjacent to the fusion boundaries. As a consequence of partial melting of the Al-Fe-Mn-(Si) intermetallics at the partially melted zone (PMZ) and segregation of the high melting point elements (particularly Fe and Mn) toward the fusion zone, severe galvanic corrosion attacks can be enhanced along the PMZ of the AA5754 weld during exposure to aqueous corrosion environments.
KeywordsPlasma-MIG WeldingAA5754MicrostructureCorrosionPartially Melted Zone
- Totten, G.E. and MacKenzie, D.S., Eds. (2003) Handbook of Aluminium: Vol. I: Physical Metallurgy and Processes. CRC Press, New York, 481-532.
- Kou, S. (2003) Welding Metallurgy. 2nd Edition, Wiley Interscience, New Jersey.
- Mathers, G. (2002) The Welding of Aluminium and Its Alloys. Woodhead Publishing Ltd., Cambridge.
- Yang, Y. and Kou, S. (2007) Mechanisms of Microsegregation Formation near Fusion Boundary in Welds Made with Dissimilar Filler Metals. Materials Science & Technology 2007 Conference and Exhibition, Detroit, September 16-20 2007, 329-340.
- Kou, S. and Yang, Y. (2007) Fusion-Boundary Macrosegregation in Dissimilar-Filler Welds. Welding Journal, 86, 303-s-312-s.
- Baeslack III, W., Lippold, J. and Savage, W. (1979) Unmixed Zone Formation in Austenitic Stainless Steel Weldments. Welding Journal, 58, 168s-176s.
- Savage, W., Nippes, E. and Szekeres, E. (1976) A Study of Fusion Boundary Phenomena in a Low Alloy Steel. Welding Journal, 55, 260s-268s.