Laser welding of aluminium alloys is more difficult then laser welding of steel. The main problems associated with laser welding of aluminium alloys in general are high surface reflectivity, thermal conductivity and volatilization of low boiling point constituents. These and other material related properties can lead to difficulties with weld and heat affected zone cracking, degradation in the mechanical properties and inconsistent welding performance. Despite these drawbacks, the laser welding of a range of aluminium alloys is being developed for implementation in the automotive industry.
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