Advertisement

Journal of Materials Science

, Volume 43, Issue 4, pp 1382–1388 | Cite as

AC TIG welding with single-component oxide activating flux for AZ31B magnesium alloys

  • Zhaodong Zhang
  • Liming LiuEmail author
  • Hao Sun
  • Lai Wang
Article

Abstract

Magnesium-based alloys are finding extensive applications foreground in aerospace and automotive applications. Weldability of magnesium alloys has recently been investigated with a variety of processes. In this article, the activating flux TIG (ATIG) welding of magnesium alloys with three single-component fluxes (TiO2, Cr2O3 and SiO2) under alternating current (AC) mode was studied. The effects of welding speed, weld current and electrode gap on the weld shape and the weld arc voltage in AC TIG welding with oxide fluxes were investigated on an AZ31B magnesium alloy substrate. The mechanisms of oxide fluxes on the arc shape and the arc voltage on the weld shape are discussed. The result showed that the TiO2 and Cr2O3 increase the weld penetration of AC TIG welding of magnesium with good bead cosmetics. The SiO2 increased the weld penetration with very poor formation of the weld surface. However, the arc voltage decreased with the used of TiO2 flux, and increased with the used of Cr2O3 flux. The mechanism of TiO2 and Cr2O3 fluxes increasing penetration should not accord with the “arc constriction”. It would comply with some potential effects of the flux interacting with the liquid metal of fusion zone.

Keywords

Welding Magnesium Alloy Weld Pool Welding Speed Alternate Current 

Notes

Acknowledgement

The authors gratefully acknowledge the sponsorship from Supported by Program for New Century Excellent Talents in University under project NCET- 04-0271 and the Excellent Young Teachers Program of MOE, P. R. C.

References

  1. 1.
    Friedrich H, Schumann S (2000) Proceedings of the second Israeli international conference on magnesium science and technology, Magnesium Research Institute, Beer Sheva, Israel, pp 9–18Google Scholar
  2. 2.
    Stern A, Munitz A (1999) J Mater Sci Lett 18:853CrossRefGoogle Scholar
  3. 3.
    Weisheit A, Galun R, Mordike BL (1998) Weld J 77:149-sGoogle Scholar
  4. 4.
    Marya M, Edwards GR, Marya SK, Olson DL (2001) In: Ohji T (ed) Proceedings of seventh international symposium of the Japan Welding Society on today and tomorrow in the science and technology of welding and joining, Japan Welding Society, Tokyo, JapanGoogle Scholar
  5. 5.
    Zhao H, Devroy T (2001) Weld J 80:204-sGoogle Scholar
  6. 6.
    ASM International (1993) Welding, brazing and soldering. ASM handbook, vol 6. Materials Park, OhioGoogle Scholar
  7. 7.
    Lancaster JF (1984) The physics of welding, 2nd edn. Pergamon Press, UKGoogle Scholar
  8. 8.
    Lancaster JF (1999) Metallurgy of welding, 6th edn. Abington, CambridgeCrossRefGoogle Scholar
  9. 9.
    Gurevich SM, Zamkov VN, Kushmienko NA (1965) Avtom Svarka 9:1Google Scholar
  10. 10.
    Zamkov VN, Prilutskii VP, Gurevich SM (1977) Avtom Svarka 1:13Google Scholar
  11. 11.
    Zamkov VN, Prilutskii VP, Guprevich SM (1977) Avtom Svarka 4:22Google Scholar
  12. 12.
    Lucas W, Howse D (1996) Weld Met Fabr 64:11Google Scholar
  13. 13.
    Anderson PCJ, Wiktorowicz R (1996) Weld Met Fabr 64:108Google Scholar
  14. 14.
    Kazakov YV, Koryagin KB, Potekhin VP (1991) Weld Int 5:202CrossRefGoogle Scholar
  15. 15.
    Mechev VS (1993) Weld Int 7:154CrossRefGoogle Scholar
  16. 16.
    Fan D, Huang Y (2005) Weld World 49:22Google Scholar
  17. 17.
    Marya M, Edwards GR (2002) Weld J 81:291-sGoogle Scholar
  18. 18.
    Sire S, Marya S (2001) Int J Form Processes 5:39CrossRefGoogle Scholar
  19. 19.
    Simonik AG (1976) Weld Prod 3:49Google Scholar

Copyright information

© Springer Science+Business Media, LLC 2007

Authors and Affiliations

  1. 1.State Key Laboratory of Material Surface Modification by Laser, Ion, and Beams, School of Materials Science and EngineeringDalian University of TechnologyDalianPeople’s Republic of China

Personalised recommendations