Neutron and synchrotron measurements of residual strain in TIG welded aluminum alloy 2024

R. A. Owen, R. V. Preston, P. J. Withers, H. R. Shercliff, P. J. Webster

    Research output: Contribution to journalArticlepeer-review

    Abstract

    Tungsten inert gas (TIG) welding is one method of joining aluminium alloys with potential application in the aerospace industry. However, for it to be seriously considered as an alternative to mechanical fasteners the interrelated problems of residual stress and distortion need to be addressed. In this paper neutron, laboratory and synchrotron X-ray diffraction methods are used to provide non-destructive information about the residual stress field in TIG-welded 2024 Al alloy. The results compare well despite the differing penetration and sampling volumes associated with each technique. It is found that the magnitudes of the tensile longitudinal stresses decrease along the plate due to progressive heating up of the plate ahead of the arc during welding, so that steady-state conditions are not achieved. Comparison of the data with a finite element model indicates that softening of the heataffected region must be included to simulate the resulting stress field. The FE model is found to be in good agreement with the data especially in the vicinity of the weld slope-out. © 2002 Elsevier Science B.V. All rights reserved.
    Original languageEnglish
    Pages (from-to)159-167
    Number of pages8
    JournalMaterials Science and Engineering A
    Volume346
    Issue number1-2
    DOIs
    Publication statusPublished - 15 Apr 2003

    Keywords

    • Aluminum alloys
    • Neutron diffraction
    • Residual stress
    • Synchrotron diffraction
    • TIG welding
    • Weld modelling

    Fingerprint

    Dive into the research topics of 'Neutron and synchrotron measurements of residual strain in TIG welded aluminum alloy 2024'. Together they form a unique fingerprint.

    Cite this