Evaluation of Residual Stress Distribution in Austenitic Stainless Steel Pipe Butt-Welded Joint

Maekawa, Akira; Noda, Michiyasu; Takahashi, Shigeru; Oumaya, Toru; Serizawa, Hisashi; Murakawa, Hidekazu

doi:10.2207/qjjws.27.240s

Cited by 9 publications

(3 citation statements)

References 3 publications

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“…The stress was simultaneously recalculated under the condition that the stress in the cut region was elastically released. The FEM results were validated by comparison with those obtained previously by the strain gauge method [10].…”

Section: Comparison With Estimation By Fem Simulationmentioning

confidence: 94%

Residual Stress Distribution in Austenitic Stainless Steel Pipe Butt-Welded Joint Measured by Neutron Diffraction Technique

Maekawa¹,

Oumaya

Noda³

et al. 2010

MSF

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This paper describes residual stress measurements and analysis of austenitic stainless steel pipe with a butt-welded joint. The measurements were done with neutron diffraction and strain gauge techniques. The measured results had typical characteristics of butt-welded pipe regarding both the decline of stress along the axial direction and the bending distribution of axial stress along the radial direction. The measured residual stress distribution by neutron diffraction was shifted more to the tensile side than that by the finite element method simulation. However, the measured radial and axial strains, except for the hoop strain determined by neutron diffraction, coincided well with analysis strains. The hoop strain was actually equivalent strain converted by a correction method because a different lattice plane had to be used to measure hoop strain. This might be one reason why the difference occurred. Therefore, future study of the correction method would be desirable.

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Section: Comparison With Estimation By Fem Simulationmentioning

confidence: 94%

Residual Stress Distribution in Austenitic Stainless Steel Pipe Butt-Welded Joint Measured by Neutron Diffraction Technique

Maekawa¹,

Oumaya

Noda³

et al. 2010

MSF

Self Cite

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“…The measured residual strains in Fig.10 were obtained using the d 0 value which was calculated by averaging the lattice constants obtained by using the {311} and {111} reflections for all the direction components and all the positions. The analysis values were validated by a simple method to measure residual stress destructively using strain gauges (27), (28) . The analyzed strain values were converted from the analyzed stresses using Eq.(5).…”

Section: Comparison Of Residual Strain In Between Measurement and Anamentioning

confidence: 99%

“…are included in both figures. The analysis result was validated by a simple method to measure residual stress destructively using strain gauges (27), (28) . The measurements obtained by using the average d 0 value in the {311} and {111} reflections do not agree with the analysis results.…”

Section: Comparison Of Residual Strain In Between Measurement and Anamentioning

confidence: 99%

Stress-Free Reference for Neutron Diffraction Measurement of Residual Stress in Butt-Welded Joints of Austenitic Stainless Steel Pipes

Maekawa¹,

Takahashi²,

Tsuji³

et al. 2012

JMMP

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Stress-free lattice spacing d 0 has the most influence on reliability of neutron stress measurements made using an angle dispersive method. However, it is hard to evaluate the lattice spacing of welded structures and ductile materials such as stainless steel accurately. In this study, suitable measurement conditions for d 0 of welded pipe joints of austenitic stainless steel were discussed. The d 0 values derived from {311} and {111} reflections, which are often used in austenitic stainless steel for residual stress measurement, were examined. Comparison of the residual strains and stresses evaluated using the obtained d 0 and the finite element analysis showed that the way the d 0 values were chosen affected the measurement accuracy significantly. The stress measurement accuracy was remarkably improved when the {311} reflection was used and the proper d 0 value was chosen in the respective neutron diffraction measurements. For instance, for the axial diffraction measurements using the {311} reflection, it was recommended that only the axial d 0 value of the {311} reflection be used; the measurements using the {111} reflection were less accurate due to the large Young's modulus. Additionally, a lower diffraction angle was judged to be one of the factors leading to a decrease of the strain measurement accuracy.

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Introduction

Beygi

Marques

Silva

2022

Computational Concepts in Simulation of Welding Processes

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Evaluation of Residual Stress Distribution in Austenitic Stainless Steel Pipe Butt-Welded Joint

Cited by 9 publications

References 3 publications

Residual Stress Distribution in Austenitic Stainless Steel Pipe Butt-Welded Joint Measured by Neutron Diffraction Technique

Residual Stress Distribution in Austenitic Stainless Steel Pipe Butt-Welded Joint Measured by Neutron Diffraction Technique

Stress-Free Reference for Neutron Diffraction Measurement of Residual Stress in Butt-Welded Joints of Austenitic Stainless Steel Pipes

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