Predicting post-weld residual stresses in ferritic steel weldments

Cory J. Hamelin, Ondrej Muránsky, Philip J. Bendeich, Lyndon Edwards

Research output: Chapter in Book/Report/Conference proceedingConference PaperResearchpeer-review

4 Citations (Scopus)

Abstract

The implementation of a semi-empirical solid-state phase transformation subroutine in the ABAQUS finite element package is presented to predict the influence of transformation strain on the post-weld residual stress field in ferritic steels. The phase transformation subroutine has been outlined in a previous study (PVP2011-57426), where it was proven accurate in predicting the phase compositions in the fusion and heat affected zone (HAZ) of an autogenous TIG beam weld in SA508 Gr.3 Cl.1 steel. While previous work focused on predictions of the steadystate material response using a 2D thermal model, the present analyses are 3D and capture the varying phase composition at weld start- and stop-ends. Predicted cooling rates at either end of the specimen are significantly higher, leading to a variation in the predicted microstructure along the weld line. To better understand the structural changes that occur in ferritic steels during a conventional welding process, a representative model of SA508 Gr.3 Cl.1 steel is discussed. The contribution of thermal, metallurgical, and transformation-induced plastic strain is highlighted in this example, providing insight to the key simulation variables necessary for accurate weld models of ferritic steels. Preliminary coupled thermo-mechanical analyses are presented that compare predicted residual stress distributions with those measured in SA508 Gr.3 Cl.1 beam welds via neutron diffraction; good agreement is observed.

Original languageEnglish
Title of host publicationASME 2012 Pressure Vessels and Piping Conference, PVP 2012
Pages1061-1069
Number of pages9
Volume6
EditionPARTS A AND B
DOIs
Publication statusPublished - 2012
Externally publishedYes
EventASME Pressure Vessels and Piping Conference (PVP) 2012 - Toronto, Canada
Duration: 15 Jul 201219 Jul 2012
https://asmedigitalcollection.asme.org/PVP/PVP2011/volume/44519 (Proceedings)

Conference

ConferenceASME Pressure Vessels and Piping Conference (PVP) 2012
Abbreviated titlePVP 2012
CountryCanada
CityToronto
Period15/07/1219/07/12
Internet address

Keywords

  • Ferritic steel
  • Finite element analysis
  • Phase transformation
  • Residual stress
  • Welding

Cite this