Effect of Overlapping of Peen Spots on Residual Stresses in Laser-Peened Aluminium Sheets

摘要： In this study, two di?erent laser peening systems were employed to investigate the e?ect of overlapping on the resulting residual stress ?elds. For each laser peening system, 2.0-mm-thick aluminium sheets were laser peened with di?erent amounts of overlapping. The residual stresses after laser peening were measured by incremental hole drilling. It was shown for both laser peening systems, that an increase in amount of overlapping induced higher magnitude compressive and deeper residual stress ?elds.