Oliver, E.C

Prangnell, Philip

Richards, David

Wescott, A.

Williams, S.W.

Withers, Philip

English

Although Friction Stir Welding (FSW) avoids many of the problems encountered whenfusion welding high strength Al-alloys, it can still result in substantial residual stresses that have a detrimental impact on service life. An FE model has been developed to investigate the effectives of the mechanical tensioning technique for controlling residual stresses in FSWs. The model purely considered the heat input and the mechanical effects of the tool were ignored. Variables, such as tensioning level, heat input, and plate geometry, have been studied. Good general agreement was found between modelling results and residual stress measurements, justifying the assumption that the stress development is dominated by the thermal field. The results showed a progressive decrease in the residual stresses for increasing tensioning levels and, although affected by the heat input, a relatively low sensitivity to the welding variables. At tensioning levels greater than ~ 50% of the room temperature yield stress, tensile were replaced by compressive residual stresses within the weld

The University of Manchester - Institutional Repository

FE Modelling of Mechanical Tensioning for Controlling Residual Stresses in Friction Stir Welds

Richards, D.G.

Prangnell, P.B.

https://pure.manchester.ac.uk/ws/files/32908442/FULL_TEXT.PDF

FE Modelling of Mechanical Tensioning for Controlling Residual Stresses in Friction Stir Welds

Abstract

Similar works

Full text

Available Versions

The University of Manchester - Institutional Repository

The University of Manchester - Institutional Repository