Residual stress relief mechanisms of 2219 Al–Cu alloy by thermal stress relief method

Abstract Monolithic thin-wall components of 2219 Al–Cu alloy are widely used in aerospace and military fields, usually treated with solution quenching to improve their comprehensive performance. However, a high magnitude residual stress is introduced into the during process, which unfavorable subsequent manufacturing process service Therefore, relief essential enhance performance components. A conventional effective method thermal (TSR). underlying mechanisms TSR still remain unclear lack quantitative interpretation. In present work, evolution distribution laws stresses, tensile properties, Vickers hardness, dislocations, precipitated phases, metallography were investigated. Based on experimental results, dislocation theory strengthening applied reveal by TSR. The results showed that circumferential axial rates can reach 86.37 85.77% after TSR, respectively. attributed dynamic configuration density. improvement mechanical properties mainly depends phases also affected orientation effect caused stress.