A study on the effect of weld groove designs on residual stresses in SS 304LN thick multipass pipe welds

Giri, A.; Mahapatra, Manas Mohan; Sharma, Kamal; Singh, Pawan Kumar

doi:10.1007/s13296-016-0118-4

Cited by 25 publications

(14 citation statements)

References 24 publications

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“…Evaluation of residual stress through mechanical strain relaxation involves the measurement of strains or displacement as a result of elastic unloading due to precisely controlled material removal. 33,34 Residual stress measurement techniques can be classified as non-destructive, semi-destructive, and entirely destructive techniques. All these techniques have their own advantages and limitations.…”

Section: Methodsmentioning

confidence: 99%

Evaluation of through-thickness residual stresses and microstructure in SA516 Gr. 70 steel welds

Taraphdar

Mahapatra

Pradhan

et al. 2021

Proceedings of the Institution of Mechanical Engineers, Part B:

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The critical working condition of nuclear power plant equipment necessitates meticulous determination of the welding process and parameters. In this work, some major influential factors of welding were investigated to observe their effects on the through-thickness residual stress distribution in multipass pressure vessel steel welds. In this regard, experiments were conducted to find the characteristics of residual stresses dispersed in SA516 Grade 70 steel welds of different groove geometries with distinct welding conditions. Three-dimensional finite element models of the weldments were developed considering a moving heat source with temperature-dependent material properties to simulate the welding thermal cycles and corresponding residual stress fields. Effects of weld groove geometry, number of weld passes, external constraints, and preheating on the through-thickness residual stress fields were studied. Additional attention was given to the evaluation of the heterogeneous microstructure and microhardness across the weld cross-section associated with their weld thermal history. Finally, the evolution of the through-thickness residual stresses attributed to subsequent weld passes was elaborated.

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Section: Methodsmentioning

confidence: 99%

Evaluation of through-thickness residual stresses and microstructure in SA516 Gr. 70 steel welds

Taraphdar

Mahapatra

Pradhan

et al. 2021

Proceedings of the Institution of Mechanical Engineers, Part B:

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“…To ensure calculation accuracy and save calculation time, fine mesh was used around the weld bead (inclusive) and coarse mesh was used at other regions [23]. e mesh model is shown in Figure 6.…”

Section: Geometric Model and Mesh Generationmentioning

confidence: 99%

Effect of Welding Sequence and Constraint on the Residual Stress and Deformation of Thick Welded Butt Joint Made of Q345qD Steel

Zhang¹,

Dong³

et al. 2022

Advances in Civil Engineering

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In this paper, the residual stress and deformation of 32 mm thick welded butt joints made of Q345qD steel using gas metal arc welding (GMAW) are studied by using the thermoelastic-plastic finite element analysis (FEA). Element birth and death technique is used to simulate the deposition of the welding consumables, and the volume heat source in double-ellipsoidal distribution is used. An in-house python code is developed to enable the volume heat source movement. After the finite element model was verified against the experimental results, the effects of five welding sequences and two types of boundary constraint conditions on the residual stress and deformation of the thick welded butt joints were investigated. Results of the experimental measurement and the numerical simulation are in good agreement. The transverse residual stress and the vertical deformation can be significantly reduced by increasing the alternating times of the welding beads in two halves of the weld. The transverse residual stress and the vertical deformation can be reduced by 21.4% and 87.4%, respectively. In addition, the residual stress and deformation of the thick welded butt joints are significantly affected by the applied constraints. Increasing the constraint significantly increases the overall level of the transverse residual stress but can decrease the maximum longitudinal residual stress by 51.8% and the vertical deformation by 65.9%.

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“…The residual stresses measured by the blind hole-drilling technique of stress relaxation showed good agreement with the numerical calculation. Giri et al [17] presented research on the effect of weld groove on residual stresses in thick steel pipes used by boiling water systems and steam pipes. They conducted experimental measurements of residual stresses with the blind hole-drilling technique with an accompanying numerical simulation.…”

Section: Introductionmentioning

confidence: 99%

Numerical Simulation and Experimental Measurement of Residual Stresses in a Thick-Walled Buried-Arc Welded Pipe Structure

Perić

Garašić

Gubeljak

et al. 2022

Metals

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In this study, a numerical simulation of a single pass welding of two thick-walled pipes with the buried-arc method was performed in order to determine the residual stresses caused by welding. The numerical simulation procedure in the thermal analysis was performed by the element birth and death method while the structural analysis was performed simultaneously, without the application of the element birth and death technique in order to reduce the duration of the numerical simulation. The simulation results were validated by experimental residual stress measurements on the outside surfaces of the welded model using the X-ray diffraction technique. A good agreement between the results of the numerical simulation and experimental measurements was confirmed.

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A study on the effect of weld groove designs on residual stresses in SS 304LN thick multipass pipe welds

Cited by 25 publications

References 24 publications

Evaluation of through-thickness residual stresses and microstructure in SA516 Gr. 70 steel welds

Evaluation of through-thickness residual stresses and microstructure in SA516 Gr. 70 steel welds

Effect of Welding Sequence and Constraint on the Residual Stress and Deformation of Thick Welded Butt Joint Made of Q345qD Steel

Numerical Simulation and Experimental Measurement of Residual Stresses in a Thick-Walled Buried-Arc Welded Pipe Structure

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