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Journal of Materials Science

, Volume 40, Issue 13, pp 3437–3443 | Cite as

Effects of oxygen contamination in the argon shielding gas in laser welding of commercially pure titanium thin sheet

  • X. Li
  • J. Xie
  • Y. Zhou
Article

Abstract

This work studied the effects of oxygen contamination in the argon shielding gases on weld microstructures and properties during laser welding of commercially pure titanium thin sheets. The experimental results, mainly analyzed by optical and scanning electron microscopy and mechanical testing, have indicated correlations between weld surface colour, weld microstructure and mechanical properties (strength, ductility, hardness). As the oxygen content increased, the weld surface colour changed from silver, straw to blue while the surface hardness continued to increase. On the other hand, with the increasing of oxygen content, the weld strength increased first and then decreased because the microstructure changed from mainly serrated alpha in welds made with pure argon shielding gas to mainly acicular and platelet alpha. Practical guidelines are also discussed, based on the study, to deal with shielding deficiencies in laser welding of titanium.

Keywords

Oxygen Polymer Microstructure Scanning Electron Microscopy Titanium 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Springer Science + Business Media, Inc. 2005

Authors and Affiliations

  • X. Li
    • 1
  • J. Xie
    • 2
  • Y. Zhou
    • 3
  1. 1.Microjoining LaboratoryUniversity of WaterlooWaterlooCanada
  2. 2.St. Jude Medical, CRMDSylmarUSA
  3. 3.Microjoining LaboratoryUniversity of WaterlooWaterlooCanada

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