Deformation Histories Relevant to Multipass Girth Welds: Temperature, Stress and Plastic Strain Histories

Jonathan Mullins; Jens Gunnars

doi:10.4028/www.scientific.net/MSF.681.61

Paper Titles

Residual Stresses in Multilayer Welds with Different Martensitic Transformation Temperatures Analyzed by High-Energy Synchrotron Diffraction
p.37

Residual Stress, Texture, and Phase Investigation of Autogenous Edge Welds Using High Energy Synchrotron Radiation
p.43

Measurement of Residual Stresses in Surface Treated Stainless Steel Groove Welds
p.49

Stability and Relaxation of Welding Residual Stresses
p.55

Deformation Histories Relevant to Multipass Girth Welds: Temperature, Stress and Plastic Strain Histories
p.61

Validation of Residual Stresses of Finite Element Simulation of Multi Pass Butt-Welded Plates Using the Contour Method
p.67

Developments in the Treatment of Residual Stresses in Welded Components
p.73

Numerical Investigation of the Influence of Microstructure on the Residual Stress Distribution and Distortion in DP600 Welds
p.79

Welding Residual Stresses Depending on Solid-State Transformation Behaviour Studied by Numerical and Experimental Methods
p.85

HomeMaterials Science ForumMaterials Science Forum Vol. 681Deformation Histories Relevant to Multipass Girth...

Deformation Histories Relevant to Multipass Girth Welds: Temperature, Stress and Plastic Strain Histories

Abstract:

Residual stresses predicted from welding simulations are known to be sensitive to the choice of material model. Recent work has shown large differences in the predicted residual stress profile when different types of hardening model are used (isotropic, kinematic or mixed models). More information is required regarding the exact deformation conditions that exist during welding. We consider finite element models of two multi-pass, stainless steel girth welds. Temperature, stress and plastic strain histories are recorded in the weld material and in the heat affected region (HAZ). Material in the weld and HAZ is observed to undergo three to five cycles of active plastic deformation followed by thermal cycling that is purely elastic. The stress state varies from biaxial compression to triaxial tension. These deformation histories are used as the basis for a discussion of the formulation of a suitable material testing schedule and subsequent constitutive modelling.

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Materials Science Forum (Volume 681)

Pages:

61-66

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https://doi.org/10.4028/www.scientific.net/MSF.681.61

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Online since:

March 2011

Authors:

Jonathan Mullins, Jens Gunnars

Keywords:

316 Stainless Steel, Finite Element Model (FEM), Multipass Girth Weld, Strain Hardening, Weld Residual Stress

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