Paper Title:
Prediction and Measurements of Thermal Residual Stresses in AA2024-T3 Friction Stir Welds as a Function of Welding Parameters
  Abstract

Friction Stir Welding (FSW) induces thermal residual stresses resulting in distortions in thin-walled structures. In order to understand and quantify this phenomenon, simulations and experiments of FSW on aluminium alloy (AA) 2024-T3 have been performed using different rotational and welding speeds. A sequentially coupled finite element (FE) model was used to study the residual stresses caused by the thermal cycling induced from FSW. The 3D FE model used temperature-dependent mechanical and thermophysical material properties. The predicted longitudinal stresses peaked at ~300 MPa and had a ‘‘W’’ profile with tensile stress peaks in the weld and compressive stresses outside the weld. In the FE model, the influence of process parameters on residual stress distribution was studied. The application of ‘hot’ welding conditions, i.e. low welding speed and high rotational speed, increased the residual stresses significantly, mainly in the transverse direction. Conversely, ‘cold’ welding conditions resulted in lower residual stresses. The magnitude and distribution of the residual stresses predicted by the FE model were validated by neutron diffraction. The results indicate a good agreement between the measured and predicted residual stresses in AA2024-T3.

  Info
Periodical
Materials Science Forum (Volumes 638-642)
Main Theme
Edited by
T. Chandra, N. Wanderka, W. Reimers , M. Ionescu
Pages
1215-1220
DOI
10.4028/www.scientific.net/MSF.638-642.1215
Citation
L. Dubourg, P. Doran, M. A. Gharghouri, S. Larose, M. Jahazi, "Prediction and Measurements of Thermal Residual Stresses in AA2024-T3 Friction Stir Welds as a Function of Welding Parameters", Materials Science Forum, Vols. 638-642, pp. 1215-1220, 2010
Online since
January 2010
Export
Price
$32.00
Share

In order to see related information, you need to Login.

In order to see related information, you need to Login.

Authors: L.K. Keppas, Dimitrios Elias Katsareas, Robert C. Wimpory, N.K. Anifantis, Anastasius Youtsos
Abstract:Finite element prediction of residual stresses in a 3-bead letterbox-type repair weld is investigated in the present study. The repair is...
445
Authors: Maarten De Strycker, Peter Buffel, Jan Belis, Christof Fimmers, Wesley Vanlaere, Guy Lagae
Abstract:The presence of residual stresses is a determining factor in the buckling behaviour of steel beams. It is therefore necessary to know the...
1425
Authors: D.M. Goudar, Mark Turski, Suzanne Clitheroe, Ed J. Kingston, Chris Gill, Philip J. Withers, David John Smith
Abstract:This paper examines the extent to which mechanical shot peening (MSP), ultrasonic impact treatment (UIT) and laser shock peening (LSP) can...
49
Authors: F. Soul, M. Ateeg
Abstract:The trend in automotive, aircraft, and marine industries is the increasing use of sheet materials to reduce weight in components and optimize...
596