Hello,
According to my basic mechanical design information, the design of welds and welded components are independent from the shot peening process. Calculations of weld strength should be carried out by the mechanical designer seperately from any further surface finish.
The shot peening is a process that follows the whole design of the component. If the weld strength is not enough to hold the two parts together due to high loads or poor welding method/process then the shot peening won't prevent for example hot cracks from initiating.
Regards
