NDLI: The Welding Deformations of Stainless Steel Pipes With Thick Wall by Narrow Gap Gas Tungsten Arc Welding

Content Provider	The American Society of Mechanical Engineers (ASME) Digital Collection
Author	Zhang, Jainxun Liu, Chuan Niu, Jing
Copyright Year	2010
Abstract	The austenitic stainless steel pipes with thick wall are widely used in the nuclear power station and are welded by narrow gap gas tungsten arc welding process. The welding deformations of multi-pass butt-welded pipes with 65 and 70mm thickness are investigated experimentally and numerically in the paper. The transient axial deformation and axis shift deformation are measured during welding. An axisymmetric FE model and a thermal mechanical calculating procedure are presented to simulate the welding axial deformations. An effective calculating method by only considering the contraction of each welding pass in the model is proposed. The experimental results show that the axis shift deformation is very small and demonstrates an elastic movement during welding; the axial shrinkage of welded pipes is the mainly deformation, which is very significant during the first several weld pass, and decreases sharply after the weld groove has been filled at the height of 30% wall thickness that makes the stiffness of pipes large enough to resist the welding shrinkage.
Sponsorship	Nuclear Engineering Division
Starting Page	269
Ending Page	274
Page Count	6
File Format	PDF
ISBN	9780791849330
DOI	10.1115/ICONE18-30088
Volume Number	18th International Conference on Nuclear Engineering: Volume 5
Conference Proceedings	18th International Conference on Nuclear Engineering
Language	English
Publisher Date	2010-05-17
Publisher Place	Xi’an, China
Access Restriction	Subscribed
Subject Keyword	Finite element model Deformation Welding Stainless steel Gas tungsten arc welding Shrinkage (materials) Stiffness Nuclear power stations Wall thickness Pipes Transients (dynamics)
Content Type	Text
Resource Type	Article

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