After rolling of stainless steel sheets compressive residual stresses forms in the corners of the sheets. These compressive residual stresses unbalanced the amount of heat that is needed for welding applying more than what’s needed for welding due to summation with compressive residual stresses, therefore, for welding those sheets on the corners, thermal stress applies more than it needed for this zone, and this overheating creates a hole at at this start and end of the weld line. There are many methods of relieving the stresses, but what do you think is the most effective and fast method of stress relieving for this issue that doesn’t change the mechanical and chemical characterizations of the material?
Please specify the sheet standard and what method is used for cold rolling?
The easiest method is thermally, by heating to 200-250 degrees
I agree with Mr. Amit Dama. We used to do this practice whenever we had to welding the corners. May be ultrasonic method can be tried.
A.V.Sethuraman
heating it to 250 to relieve stresses or shot peening it might help .
Also have a look at stress corrosion cracking near the heat affected zone. Even though it is stainless steel the welding temperature can severely affect its anti corrosive properties creating intragranular corrosion specifically when it is exposed to high temperature. could lead to early life fatigue failure
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