Contraintes résiduelles après soudage par le procédé tungsten inert gas et par faisceau d'électrons de tôles épaisses en TA6V

  • Sprauel J
  • Rodriguez R
  • Lebrun J
 et al. 
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The object of this work was to compare the stresses remaining after welding TA6V sheets 20 mm thick by the tungsten inert gas (TIG) and electron bombardment (EB) methods. The measurements were made (on samples of dimensions 180 mm × 90 mm × 20 mm after welding) by X-ray diffraction on a goniometer equipped with a position-sensitive detector. We determined the distribution of transverse residual stresses (perpendicular to the weld) both in the thickness and on the surfaces of the two sheets. We showed that - the X-ray method of residual stress measurement may readily be applied to welded titanium alloys except in the middle of the weldment where there are very coarse grains; - the residual stresses, both in the thickness and on the surface, are compressive in the weldment and tensile in the heat-affected zone for the two types of welding; and - the level of residual stresses (which can reach 500 MPa) is the same for the two types of welding but the zones affected by the residual stresses are much wider in the TIG case than in the EB case. © 1980.

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  • J. M. Sprauel

  • R. Rodriguez

  • J. L. Lebrun

  • G. Maeder

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