An integrated model to predict residual stress reduction by multiple cold forging operations in extra-large AA7050 T-section panels. (June 2018)

• Record Type: Journal Article
• Authors: Pan, Ran; Shi, Zhusheng; Davies, Catrin M; Li, Chen; Kaye, Michael; Lin, Jianguo
• Is Part Of: Proceedings of the Institution of Mechanical Engineers. Volume 232:Number 8(2018)
• Page Start: 1319
• Page End: 1330
• Publication Date: 2018-06
• Subjects: Finite element modelling -- extra-large panels -- heat treatment -- residual stress reduction -- cold forging; Mechanical engineering -- Periodicals; Engineering -- Management -- Periodicals; Manufacturing processes -- Periodicals; 629.8
• DOI: 10.1177/0954405416673097
• Languages: English
• ISSNs: 0954-4054

Abstract

A finite element model has been developed to determine the effectiveness of a cold compression technique to reduce the large residual stresses generated from quenching solution heat treated T-section components of aluminium alloy AA7050. To compress long components, a multi-step process is required with some amount of overlap. A parametric study has been performed to determine the effect of the compression ratio, friction coefficient, length of overlap and length of the T-section component on the residual stress distribution post-quenching and after subsequent cold compression. Generally, a percentage reduction in the peak residual stress of over 90% was found. The optimal parameters for residual stress relief by cold compression have been suggested from the cases considered.