Mitigation of residual stress and deformation induced by TIG welding in thin-walled pipes through external constraint

Thin-walled pipes have been widely used in chemical facilities and propulsion structures, where the distortion problem induced by welding fabrication is common and prominent, deteriorating assembly accuracy and even reducing load-bearing capacity. External constraint has shown great capacity to cont...

Descripción completa

Guardado en:

Detalles Bibliográficos
Autores principales:	Yong Liu, Ping Wang, Hongyuan Fang, Ninshu Ma
Formato:	article
Lenguaje:	EN
Publicado:	Elsevier 2021
Materias:	External constraint Welding distortion Thin-walled pipe Residual stress Numerical simulation Mining engineering. Metallurgy TN1-997
Acceso en línea:	https://doaj.org/article/3413d8225f0946b2a73dbd60f24de9f8
Etiquetas:	Agregar Etiqueta Sin Etiquetas, Sea el primero en etiquetar este registro!

id	oai:doaj.org-article:3413d8225f0946b2a73dbd60f24de9f8
record_format	dspace
spelling	oai:doaj.org-article:3413d8225f0946b2a73dbd60f24de9f82021-11-04T04:31:36ZMitigation of residual stress and deformation induced by TIG welding in thin-walled pipes through external constraint2238-785410.1016/j.jmrt.2021.10.035https://doaj.org/article/3413d8225f0946b2a73dbd60f24de9f82021-11-01T00:00:00Zhttp://www.sciencedirect.com/science/article/pii/S2238785421011716https://doaj.org/toc/2238-7854Thin-walled pipes have been widely used in chemical facilities and propulsion structures, where the distortion problem induced by welding fabrication is common and prominent, deteriorating assembly accuracy and even reducing load-bearing capacity. External constraint has shown great capacity to control the residual stresses and welding deformation. The objective of this research is to investigate the effect of constraint on welding process in thin-walled 304 stainless steel pipes through experiments and numerical simulation. To include the clamping effect in the welding simulation, the external constraint was modeled as the additional heat dissipation and mechanical restraint. The seam welded pipes with and without constraints were both modeled for comparison purpose. Good agreement was obtained between numerical modeling and measurements in both pipes. The results show that the welding deformation and residual stresses are both obviously reduced under the effect of external constraint, which was found to work mainly in the cooling process by generating more tensile plastic strain so as to reduce the shrinkage force in both axial and hoop directions. The maximum distortion is observed on the middle section of constrained pipe and on the end sections in the unconstrained one, which is caused by the combined effect of bending direction on the circumference and shrinkage force in the axial direction according to the inherent strain analysis. Moreover, the analysis of welding deformation mode reveals that the inward bending induced by hoop constraint contributes to the dimensional accuracy of the pipe ends under axial shrinkage forces. Parametric simulation analysis of the external constraint strategy was performed, and the results showed that reducing the constraint distance was the most effective way to mitigate welding distortion in seam welded pipes.Yong LiuPing WangHongyuan FangNinshu MaElsevierarticleExternal constraintWelding distortionThin-walled pipeResidual stressNumerical simulationMining engineering. MetallurgyTN1-997ENJournal of Materials Research and Technology, Vol 15, Iss , Pp 4636-4651 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	External constraint Welding distortion Thin-walled pipe Residual stress Numerical simulation Mining engineering. Metallurgy TN1-997
spellingShingle	External constraint Welding distortion Thin-walled pipe Residual stress Numerical simulation Mining engineering. Metallurgy TN1-997 Yong Liu Ping Wang Hongyuan Fang Ninshu Ma Mitigation of residual stress and deformation induced by TIG welding in thin-walled pipes through external constraint
description	Thin-walled pipes have been widely used in chemical facilities and propulsion structures, where the distortion problem induced by welding fabrication is common and prominent, deteriorating assembly accuracy and even reducing load-bearing capacity. External constraint has shown great capacity to control the residual stresses and welding deformation. The objective of this research is to investigate the effect of constraint on welding process in thin-walled 304 stainless steel pipes through experiments and numerical simulation. To include the clamping effect in the welding simulation, the external constraint was modeled as the additional heat dissipation and mechanical restraint. The seam welded pipes with and without constraints were both modeled for comparison purpose. Good agreement was obtained between numerical modeling and measurements in both pipes. The results show that the welding deformation and residual stresses are both obviously reduced under the effect of external constraint, which was found to work mainly in the cooling process by generating more tensile plastic strain so as to reduce the shrinkage force in both axial and hoop directions. The maximum distortion is observed on the middle section of constrained pipe and on the end sections in the unconstrained one, which is caused by the combined effect of bending direction on the circumference and shrinkage force in the axial direction according to the inherent strain analysis. Moreover, the analysis of welding deformation mode reveals that the inward bending induced by hoop constraint contributes to the dimensional accuracy of the pipe ends under axial shrinkage forces. Parametric simulation analysis of the external constraint strategy was performed, and the results showed that reducing the constraint distance was the most effective way to mitigate welding distortion in seam welded pipes.
format	article
author	Yong Liu Ping Wang Hongyuan Fang Ninshu Ma
author_facet	Yong Liu Ping Wang Hongyuan Fang Ninshu Ma
author_sort	Yong Liu
title	Mitigation of residual stress and deformation induced by TIG welding in thin-walled pipes through external constraint
title_short	Mitigation of residual stress and deformation induced by TIG welding in thin-walled pipes through external constraint
title_full	Mitigation of residual stress and deformation induced by TIG welding in thin-walled pipes through external constraint
title_fullStr	Mitigation of residual stress and deformation induced by TIG welding in thin-walled pipes through external constraint
title_full_unstemmed	Mitigation of residual stress and deformation induced by TIG welding in thin-walled pipes through external constraint
title_sort	mitigation of residual stress and deformation induced by tig welding in thin-walled pipes through external constraint
publisher	Elsevier
publishDate	2021
url	https://doaj.org/article/3413d8225f0946b2a73dbd60f24de9f8
work_keys_str_mv	AT yongliu mitigationofresidualstressanddeformationinducedbytigweldinginthinwalledpipesthroughexternalconstraint AT pingwang mitigationofresidualstressanddeformationinducedbytigweldinginthinwalledpipesthroughexternalconstraint AT hongyuanfang mitigationofresidualstressanddeformationinducedbytigweldinginthinwalledpipesthroughexternalconstraint AT ninshuma mitigationofresidualstressanddeformationinducedbytigweldinginthinwalledpipesthroughexternalconstraint
_version_	1718445267088310272

Mitigation of residual stress and deformation induced by TIG welding in thin-walled pipes through external constraint

Ejemplares similares