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Journal of Materials Science

, Volume 42, Issue 18, pp 7956–7963 | Cite as

Welding of aluminium by the MIG process with indirect electric arc (MIG-IEA)

  • R. GarcíaEmail author
  • V. H. López
  • E. Bedolla
Article
  • 281 Downloads

Abstract

A novel modification of the metal inert gas (MIG) welding method, which was developed to weld metal matrix composites, was applied to join plates of aluminium 12.5 mm thick. The plates were prepared with square edges and with a small single-V preparation with an angle of 45° in the upper part. The electric arc was indirectly applied on the single-V butt weld over strips of Al-2024 placed on top of the joint. Thermal analysis showed that the efficiency of the MIG process with indirect electric arc (IEA) is increased due to the reduction of heat losses and fully penetrated welds with a high depth-to-width ratio can be produced as compared to plain MIG welding in which partial penetration and lack of lateral fusion were observed. Microstructural examination of the welds revealed distinct characteristics such as partially melted grains trapped within the weld next to the fusion line for IEA welds and the typical epitaxial and columnar growth from the base metal partially melted grains for plain welds, i.e. direct application of the electric arc (DEA).

Keywords

Welding Base Metal Weld Metal Welding Process Weld Pool 

Notes

Acknowledgements

The authors would like to thank Coordinación de la Investigación Científica of the UMSNH for funding this study and to Dra. Lourdes Mondragón from Instituto Tecnologico de Morelia for the facilities consented in the use of the SEM.

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Copyright information

© Springer Science+Business Media, LLC 2007

Authors and Affiliations

  1. 1.Instituto de Investigaciones MetalúrgicasUniversidad Michoacana de San Nicolás de HidalgoMoreliaMéxico

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