Peening is one way to counteract the shrinkage forces of a weld bead as it cools. Essentially, peening the bead stretches it and makes it thinner, thus relieving (by plastic deformation) the stresses induced by contraction as the metal cools. ... Before peening is used on a job, engineering approval should be obtained.
Note: This is not an copy from any websites. this is what i Know.
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Answer:
Peening is one way to counteract the shrinkage forces of a weld bead as it cools. Essentially, peening the bead stretches it and makes it thinner, thus relieving (by plastic deformation) the stresses induced by contraction as the metal cools. ... Before peening is used on a job, engineering approval should be obtained.
Note: This is not an copy from any websites. this is what i Know.