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Finite Element Prediction of Residual Stress and Deformation Induced by Double-Pass TIG Welding of Al 2219 Plate

1,2,3, 1,2,3,*, 1,2,3 and 1,2
1
College of Mechanical and Electrical Engineering, Central South University, Changsha 410083, China
2
State Key Laboratory of High-Performance Complex Manufacturing, Central South University, Changsha 410083, China
3
Light Alloy Research Institute, Central South University, Changsha 410083, China
*
Author to whom correspondence should be addressed.
Materials 2019, 12(14), 2251; https://doi.org/10.3390/ma12142251
Received: 29 May 2019 / Revised: 26 June 2019 / Accepted: 10 July 2019 / Published: 12 July 2019
(This article belongs to the Section Manufacturing Processes and Systems)
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PDF [25001 KB, uploaded 12 July 2019]
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Abstract

Finite element (FE) analysis of welding residual stress and deformation is one of the essential stages in the manufacturing process of mechanical structures and parts. It aids in reducing the production cost, minimizing errors, and optimizing the manufactured component. This paper presents a numerical prediction of residual stress and deformation induced by two-pass TIG welding of Al 2219 plates. The FE model was developed using ABAQUS and FORTRAN packages, Goldak’s heat source model was implemented by coding the nonuniform distributed flux (DFLUX) in user subroutine to represent the ellipsoidal moving weld torch, having front and rear power density distribution. Radiation and convection heat losses were taken into account. The mechanical boundary condition was applied to prevent the model from rotation and displacement in all directions while allowing material deformation. The FE model was experimentally validated and the compared results show good agreement with average variations of 18.8% and 17.4% in residual stresses and deformation, respectively. View Full-Text
Keywords: TIG welding; residual stress; deformation; Al 2219; FE model; DFLUX subroutine TIG welding; residual stress; deformation; Al 2219; FE model; DFLUX subroutine
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).
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Ahmad, A.S.; Wu, Y.; Gong, H.; Nie, L. Finite Element Prediction of Residual Stress and Deformation Induced by Double-Pass TIG Welding of Al 2219 Plate. Materials 2019, 12, 2251.

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