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Residual stresses formation in multi-pass weldment: A numerical and experimental study
https://orcid.org/0000-0001-5097-3335
AbstractIn this study, the residual stresses distribution induced by multi-pass arc welding of the steel S355J2+N are investigated experimentally and numerically. An extended approach is used for the simulations, which considers the change of the local microstructure properties due to multiple reheating. Experimental material data obtained from physical welding simulations with Gleeble® are used for the model calibration. The experimental stress study is performed using a neutron diffraction method on a fourier stress diffractometer. Numerical analysis of the welding stresses formation in the weldment is performed and compared to the experimental study. The results explain the influence of the welding thermal history on the resulting local thermo-mechanical properties in the heat-affected zone and, thus, on the residual stress distribution. The consideration of the local microstructure properties in the welding simulation leads to a significant increase in accuracy of the numerical results. The major influence factor on the residual stress formation is the change in the interpass microstructure yield strength. When a root pass with short cooling times is subjected to re-austenitisation in the fine-grained zone, the yield strength increases in this area and affects consequently the residual stress distribution. The influence of the reheating is detectable in the depth of the weldment, but it is less significant for the residual stress formation near the surface of the welded joint.
HighlightsThermo-mechanical properties of S355 steel grade indicated during multiple thermal cyclesFE welding simulation considering microstructure properties as a function of the local multiple thermal cyclesComparison of simulation results with and without consideration of the multiple heating effectsValidation of the numerical results through neutron diffraction measurements in the depth of the specimen
Residual stresses formation in multi-pass weldment: A numerical and experimental study
https://orcid.org/0000-0001-5097-3335
AbstractIn this study, the residual stresses distribution induced by multi-pass arc welding of the steel S355J2+N are investigated experimentally and numerically. An extended approach is used for the simulations, which considers the change of the local microstructure properties due to multiple reheating. Experimental material data obtained from physical welding simulations with Gleeble® are used for the model calibration. The experimental stress study is performed using a neutron diffraction method on a fourier stress diffractometer. Numerical analysis of the welding stresses formation in the weldment is performed and compared to the experimental study. The results explain the influence of the welding thermal history on the resulting local thermo-mechanical properties in the heat-affected zone and, thus, on the residual stress distribution. The consideration of the local microstructure properties in the welding simulation leads to a significant increase in accuracy of the numerical results. The major influence factor on the residual stress formation is the change in the interpass microstructure yield strength. When a root pass with short cooling times is subjected to re-austenitisation in the fine-grained zone, the yield strength increases in this area and affects consequently the residual stress distribution. The influence of the reheating is detectable in the depth of the weldment, but it is less significant for the residual stress formation near the surface of the welded joint.
HighlightsThermo-mechanical properties of S355 steel grade indicated during multiple thermal cyclesFE welding simulation considering microstructure properties as a function of the local multiple thermal cyclesComparison of simulation results with and without consideration of the multiple heating effectsValidation of the numerical results through neutron diffraction measurements in the depth of the specimen
Residual stresses formation in multi-pass weldment: A numerical and experimental study
https://orcid.org/0000-0001-5097-3335
AbstractIn this study, the residual stresses distribution induced by multi-pass arc welding of the steel S355J2+N are investigated experimentally and numerically. An extended approach is used for the simulations, which considers the change of the local microstructure properties due to multiple reheating. Experimental material data obtained from physical welding simulations with Gleeble® are used for the model calibration. The experimental stress study is performed using a neutron diffraction method on a fourier stress diffractometer. Numerical analysis of the welding stresses formation in the weldment is performed and compared to the experimental study. The results explain the influence of the welding thermal history on the resulting local thermo-mechanical properties in the heat-affected zone and, thus, on the residual stress distribution. The consideration of the local microstructure properties in the welding simulation leads to a significant increase in accuracy of the numerical results. The major influence factor on the residual stress formation is the change in the interpass microstructure yield strength. When a root pass with short cooling times is subjected to re-austenitisation in the fine-grained zone, the yield strength increases in this area and affects consequently the residual stress distribution. The influence of the reheating is detectable in the depth of the weldment, but it is less significant for the residual stress formation near the surface of the welded joint.
HighlightsThermo-mechanical properties of S355 steel grade indicated during multiple thermal cyclesFE welding simulation considering microstructure properties as a function of the local multiple thermal cyclesComparison of simulation results with and without consideration of the multiple heating effectsValidation of the numerical results through neutron diffraction measurements in the depth of the specimen
Residual stresses formation in multi-pass weldment: A numerical and experimental study
Genchev, Gancho (Autor:in) / Doynov, Nikolay (Autor:in) / Ossenbrink, Ralf (Autor:in) / Michailov, Vesselin (Autor:in) / Bokuchava, Gizo (Autor:in) / Petrov, Peter (Autor:in)
Journal of Constructional Steel Research ; 138 ; 633-641
19.08.2017
9 pages
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
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