Stress-relief annealing (SR treatment) is often applied to relieve welding residual stresses in the fabrication process of pressure vessels, etc. This study aims at development of an efficient method as simple as hand calculation to estimate reduction of residual stresses of very thick welded joint by SR treatment. In the first report, an estimating method was developed for relaxation tests, in uniaxial stress state, at changing and constant temperatures because the stress relaxation phenomenon is considerably similar to that observed in the SR treatment of a joint. In this report, the stresses relaxed by SR treatment in a very thick welded joint are analyzed accurately by the finite element method based on thermal elastic-plastic-creep theory. The characteristics of the changes of the welding residual stresses in multiaxial stress state are studied in detail for further development of the estimating method to SR treatment of a very thick welded joint, of which the stress state and boundary condition are very complex.
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February 1999
Research Papers
A Simple Estimating Method for Reduction of Welding Residual Stresses in Thick Welded Joint From Stress-Relief Annealing—Part II: The Characteristics of Reduction of Welding Residual Stresses in Very Thick Joints During SR Treatment
K. Nakacho,
K. Nakacho
Joining and Welding Research Institute, Osaka University, Mihogaoka 11-1, Ibaraki, Osaka 567, Japan
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Y. Ueda
Y. Ueda
Joining and Welding Research Institute, Osaka University, Mihogaoka 11-1, Ibaraki, Osaka 567, Japan
Search for other works by this author on:
K. Nakacho
Joining and Welding Research Institute, Osaka University, Mihogaoka 11-1, Ibaraki, Osaka 567, Japan
Y. Ueda
Joining and Welding Research Institute, Osaka University, Mihogaoka 11-1, Ibaraki, Osaka 567, Japan
J. Pressure Vessel Technol. Feb 1999, 121(1): 11-16 (6 pages)
Published Online: February 1, 1999
Article history
Received:
July 17, 1997
Revised:
July 28, 1998
Online:
February 11, 2008
Connected Content
This is a companion to:
Experimental and Theoretical Studies of Mist Jet Impingement Cooling
Citation
Nakacho, K., and Ueda, Y. (February 1, 1999). "A Simple Estimating Method for Reduction of Welding Residual Stresses in Thick Welded Joint From Stress-Relief Annealing—Part II: The Characteristics of Reduction of Welding Residual Stresses in Very Thick Joints During SR Treatment." ASME. J. Pressure Vessel Technol. February 1999; 121(1): 11–16. https://doi.org/10.1115/1.2883659
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