Article ID Journal Published Year Pages File Type
1501139 Scripta Materialia 2008 4 Pages PDF
Abstract

Hot tears in 6xxx aluminium alloy laser welds are characterized. They are shown to be intergranular, originating from fracture of liquid films without plasticity of the surrounding grains. The hot tear initiates on both sides of the fusion zone, follows the liquid films between the columnar grains of the weld line and then propagates around the equiaxed grains of the fusion zone centre. By using three-dimensional X-ray tomography, the exact shape of the hot tears has been visualized.

Related Topics
Physical Sciences and Engineering Materials Science Ceramics and Composites
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