Study and analysis of residual stresses due to various secondary processes in AA 2219 annealed sheet using acoustic emission and hole drilling methods

This study highlights the methods of assessing the variations in residual stress of AA 2219 annealed sheet undergoing various secondary operations like blanking, forming, welding, etc. Attempt is made here to use acoustic emission (AE) as a tool to assess the residual stress and to compare it with the results obtained by Hole Drilling method. This paper discusses the experimental set up, methodology and observations. The observations are expected to provide enhanced quality control methodology for AA 2219 sheet metal components, especially where thermomechanical treatments are involved in the process of realization.