Abstract
The laser braze-welding technique was aimed to join a low alloyed zinc coated steel used in automotive industry, with a deformable, aging hardenable aluminum alloy from the 6xxx series using as filler material a AlSi12 wire. The heterogeneous joint was obtained by welding of aluminum alloy with the filler wire and by brazing of molten aluminum alloy together with the filler wire on the surface of a zinc coated steel which remained in solid state. The results showed that by using a proper heat input, the zinc coated steel was brazed without a melting process by the aluminum alloy which was in liquid state. On the interface between the zinc coated steel and the welded seam, a thin layer (the thickness was 6 to 8 μm) formed consisting of star (Al-Fe-Si) or needle shape (Mg-Al-Fe-Mn) intermetallic phases.
About the authors
Dr. Ion Mitelea (1946) is currently a Professor of Materials Science, Materials and Heat Treatments for Welded Structures and Selection and Use of Engineering Materials at University Politehnica Timisoara, Romania.
Dr. Corneliu Marius Craciunescu (1960) is a Professor of Materials Science at the Department of Materials and Manufacturing Engineering at University Politehnica Timisoara. His main research area is magnetic shape memory alloys.
Ciprian Pavel Lucian (1988) is a PhD student at University Politehnica Timisoara. He performs his research experiments under the coordination of Prof. Mitelea.
Dr. Ion Dragoş Uţu, born 1978, graduated from University Politehnica Timisoara, Romania, as a Bachelor and PhD, and is currently an Associate Professor in the Material Science and Manufacturing department at University Politehnica Timisoara, Romania.
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