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Laser Welding Process

C. Zuber
EPFL (Swiss federal institute of Technology - Lausanne), CH

Keywords:
welding, aluminium alloys, superalloys,non-ferrous alloys, aerospace technology, transportation

Abstract:
The physical metallurgy laboratory of EPFL has developed a welding process for crack sensitive alloys without material input. The combination of two laser beams allows welding with accurately controlled cooling cycle which avoids the formation of hot cracks in the welding zone. Due to less residual stresses and favorable equiaxed microstructure, improved joint quality is obtained. The process has been successfully tested in the laboratory on aluminum sheets of aerospace quality.

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