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In Welding Distortion Occurs Due To. In general once a plate has buckled it cannot be pushed back mechanically. Because welding involves highly localised heating of joint edges to fuse the material non-uniform stresses are set up in.
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Shrinkage due to plastic thermal strain of the weld metal and base metal during the heating and cooling cycle Internal stresses formed in base metal due to removing restraints given to welds by fixed components surrounding it So both Welding processes procedures and Material properties affect the extent of distortion Effects of Distortion. In thin-sectionstructures as fre quently used in the shipbuilding rail road aerospace and automotive industries buckling is a common type of distortion. Knowing how these distortions occur is.
This distortion comes from residual stress.
When the liquid weld material at approximately 6500F is added to the cooler parent material the liquid material will form a shell around it still containing the liquid material inside. The most important part of understanding and predicting distortion is to evaluate what happens in the welding process. That some amount of distortion inevitably occurs due to welding. The component is heated along the line of the welded joint but on the opposite side to the weld so the induced stresses will pull the flange flat.
