%0 journal article
%@ 0255-5476
%A Enz, J., Riekehr, S., Ventzke, V., Kashaev, N.

%D 2015
%J Materials Science Forum, Light Metals Technology 2015

%P 389-394 
%R doi:10.4028/www.scientific.net/MSF.828-829.389
%T Laser Weldbability of different Al-Zn alloys and its improvement
%U https://doi.org/10.4028/www.scientific.net/MSF.828-829.389
 
%X Weld defects - such as porosity and hot cracking - occur especially during the laser beam welding of high-alloyed Al-Zn alloys. This significantly limits the application range of these promising high-strength alloys. In the present study the laser weldability of Al-Zn alloys was investigated regarding welding parameters and chemical composition of the alloys. In addition, the novel approach of the Helmholtz-Zentrum Geesthacht for overcoming the weldability problems was applied to the different Al-Zn alloys in order to assess its capability. It was shown that the laser weldability of Al-Zn alloys deteriorates with an increasing amount of Zn, Mg and Cu. The variation of laser welding parameters did not lead to any improvement of weldability. Only the use of a V foil as additional filler material resulted in promising welding results even for high-alloyed Al-Zn alloys.