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Numerical and Experimental Evaluation of Residual Stresses in Dissimilar Weld Joints

[+] Author Affiliations
Danièle Ayrault, Alix Bonaventure, Olivier Asserin, Vincent Klosek

CEA, Gif-sur-Yvette, France

Guillaume Montay

Institut Charles Delaunay, Troyes, France

Paper No. PVP2011-57523, pp. 1515-1522; 8 pages
  • ASME 2011 Pressure Vessels and Piping Conference
  • Volume 6: Materials and Fabrication, Parts A and B
  • Baltimore, Maryland, USA, July 17–21, 2011
  • Conference Sponsors: Pressure Vessels and Piping Division
  • ISBN: 978-0-7918-4456-4
  • Copyright © 2011 by ASME


This paper describes finite element modelling of residual stresses in tubular dissimilar weld joints. To validate numerical approach, residual stresses are determined experimentally in various locations of the welded specimen by using complementary methods such as neutron diffraction technique and increment hole drilling method combined to speckle interferometry. Dissimilar metal weld specimens (DMW), representative of configurations in primary coolant circuit of pressurized water nuclear reactors, are produced using AISI 316L stainless steel and low alloy carbon 16MND5 steel as base materials and a nickel based filler metal (Inconel 82) for buttering of the ferritic side and the filling between the buttered pipe and stainless steel one. The simulation of the manufacturing procedure of the DMW specimen is firstly performed thanks to an equivalent heat source. Secondly, the mechanical behaviour is calculated by using the computed thermo-metallurgical history for each welded pass. The “birth and death” elements method is used to simulate the addition of filler metal for this multi-pass welding configuration. A relatively good agreement is observed between the calculated and experimental results.

Copyright © 2011 by ASME



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