An Efficient Method for Estimation of Reduction of Welding Residual Stresses from Stress-Relief Annealing (Report I) : Development of Basic Equations for One-dimensional Stress State and Their Accuracy(Mechanics, Strength & Structural Design)

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Stress-relief annealing (SR treatment) is often applied to relieve welding residual stresses. This treatment may be included 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 this 1st report, an estimating method is developed for relaxation tests (in uni-axial stress state) at changing and constant temperatures. The stress relaxation phenomenon at the relaxation tests is considerably similar to that observed during SR treatment. In the next report, this method is extended to be applicable to SR treatment of very thick welded joints in multi-axial stress state.
大阪大学の論文