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Modeling of Tensile Residual Stresses Extending More Than 5 Weld Widths From Weld Joint

[+] Author Affiliations
William Mohr, Yu-Ping Yang

EWI, Columbus, OH

Paper No. PVP2014-28042, pp. V06BT06A051; 10 pages
  • ASME 2014 Pressure Vessels and Piping Conference
  • Volume 6B: Materials and Fabrication
  • Anaheim, California, USA, July 20–24, 2014
  • Conference Sponsors: Pressure Vessels and Piping Division
  • ISBN: 978-0-7918-4604-9
  • Copyright © 2014 by ASME


Welding residual stresses around a cylindrically symmetric weld between two steel components, a necked steel forging and a uniform thickness plate, were modeled using a finite-element modeling approach. The modeling included a preheat period, a 22-pass weld and a limited cooling rate after welding, all with a sequential thermal and mechanical analysis approach. The configuration, with a J-groove bevel at the outside of the forging flange, allowed the flange to be joined to a thick steel plate. Welding residual stresses were large and tensile in the weld area. A region of surface residual tensile stress on the flange extended to the neck at more than 5 weld widths from the weld joint in a region that was not heated more than 100°C. Modifications of the welding to reduce the driving forces for residual stress changed the distribution near the weld, but did not greatly affect the remote stresses. A change of fixturing on the faying surface did significantly reduce the remote tensile stresses by more than 30%.

Copyright © 2014 by ASME



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