Laser Welding of SSM Cast A356 Aluminium Alloy Processed with CSIR-Rheo Technology

Abstract:

Samples of aluminium alloy A356 were manufactured by Semi Solid Metals HPDC technology, developed recently in CSIR-Pretoria. They were butt welded in as cast conditions using an Nd:YAG laser. The base metal and weld microstructure were presented. The effect of different heat treatments on microstructure and mechanical properties of the welds were investigated. It was found that the fine dendrite structure of the weld metal contributed for equalizing the mechanical properties of the joint.

• Periodical: Solid State Phenomena (Volumes 116-117)
• Pages: 173-176
• DOI: https://doi.org/10.4028/www.scientific.net/SSP.116-117.173
• Online since: October 2006
• Authors: R. Akhter, L. Ivanchev, C. Van Rooyen, P. Kazadi, H.P. Burger
• Keywords: A356 Aluminum Alloy, Alloy, Aluminum (Al), Heat Treatment, HPDC, Laser, Rheo Technology, Semi-Solid Metal, Welding

References

[1] L. Ivanchev, D Wilkins, G. Govender: 8th Int. Conf. Semi-Solid Processing of Alloys and Composites, (Sept. 21-23, Cyprus 2004).

[2] M.L. Santella, T. Engstrom, D. Storjohann and T.Y. Pan: Scripta Materialia Vol. 53 (2005), pp.201-206.

DOI: 10.1016/j.scriptamat.2005.03.040

[3] S. Ramasamy, C.E. Albright: J. Laser Appl. Vol. 12 (2000), p.101.

[4] R. Febbro and K. Chouf: J. Laser App. Vol. 12 (2000), p.142.

[5] E. Orgis, A. Wahlen, H. Luchinger and P.J. Uggowitzer: J. of Light Metals Vol. 2(2002), pp.263-269.