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Analysis and comparison of aluminum alloy welded joints between metal inert GAS welding and tungsten inert gas welding

  • Beihang University
  • Nanyang Technological University
  • Agency for Science, Technology and Research, Singapore

Research output: Contribution to journalArticlepeer-review

Abstract

Surface contamination usually occurs during welding processing and it affects the welds quality largely. However, the formation of such contaminants has seldom been studied. Effort was made to study the contaminants caused by metal inert gas (MIG) welding and tungsten inert gas (TIG) welding processes of aluminum alloy, respectively. SEM, FTIR and XPS analysis was carried out to investigate the microstructure as well as surface chemistry. These contaminants were found to be mainly consisting of Al2O3, MgO, carbide and chromium complexes. The difference of contaminants between MIG and TIG welds was further examined. In addition, method to minimize these contaminants was proposed.

Original languageEnglish
Article number1550079
JournalSurface Review and Letters
Volume22
Issue number6
DOIs
StatePublished - 1 Dec 2015

Keywords

  • MIG
  • Surface analysis
  • TIG
  • aluminum alloy
  • microstructure

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