Weld defects
Failure investigation often uncovers facts that lead to changes in design, manufacturing, or operating practice, which will eliminate similar failures in the future. Failures of insignificant parts can also lead to advances in knowledge and should be done objectively, as with a large structure. The following four areas of interest should be investigated to determine the cause of weld failure or weld defects and the interplay of factors involved: Initial observation . The detailed study by visual inspection should be made at the failure site as quickly as Photographs should be taken, preferably in color, of all parts, structures, failure surfaces, fracture texture appearance, final location of component debris, and all other factors. Background data . All information concerning specifications, drawings, component design, fabrication methods, welding procedures, weld schedules, repairs in and during manufacturing and in service, maintenance, and service use. Att...