Stress Measurement of Stainless Steel Piping Welds by Complementary Use of High-Energy Synchrotron X-rays and Neutrons
Abstract
:1. Introduction
2. Materials and Methods
2.1. Test Material
2.2. Specimens
2.2.1. Strain-Free Reference Specimen
2.2.2. DEM Specimen
2.3. Neutron Stress Measurements
2.4. DEM with Synchrotron X-rays
3. Results and Discussion
3.1. Residual Stress Distribution Measured by Neutron Diffraction
3.2. 2D Stress Distributions Measured by DEM
3.3. Evaluation of Triaxial Residual Stress by Combination of Neutron Diffraction and DEM
4. Conclusions
- The DEM is an effective tool for stress evaluation in welds and coarse grains using high-energy synchrotron X-rays. Its effectiveness is primarily due to its low susceptibility to errors arising from the diffraction positions of the coarse grains in the weld.
- Residual stresses in welded piping were quantified using the strain scanning method with neutron diffraction. The triaxial stress distribution, as determined by this method, was modeled using a polynomial equation, enabling the creation of a hoop stress map.
- The axial and radial stresses, obtained from the DEM using high-energy synchrotron X-ray radiation, were integrated with the hoop stresses measured via neutron diffraction. This integration, based on a plane strain assumption, facilitated the development of a comprehensive residual stress map for the weld in a triaxial stress state.
Author Contributions
Funding
Data Availability Statement
Acknowledgments
Conflicts of Interest
References
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Element | C | Si | Mn | P | S | Ni | Cr | Mo | Cu | Fe |
---|---|---|---|---|---|---|---|---|---|---|
Base pipe | 0.05 | 0.37 | 1.43 | 0.033 | 0.004 | 10.25 | 16.53 | 2.06 | - | Bal. |
Insert ring | 0.012 | 0.36 | 1.78 | 0.023 | 0.001 | 12.09 | 19.44 | 2.36 | 0.27 | Bal. |
GTAW | 0.017 | 0.41 | 1.88 | 0.005 | 0.002 | 11.38 | 19.61 | 2.31 | 0.01 | Bal. |
SMAW | 0.055 | 0.41 | 1.40 | 0.029 | 0.009 | 12.08 | 19.22 | 2.33 | 0.26 | Bal. |
y Range (0.4 mm Pitch) | z Range (1.0 mm Pitch) |
---|---|
0.4~12.8 | −7~−5, 6~10 |
0.4~14.0 | −4~−2, 2~5 |
0.4~14.8 | −1, ~1 |
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Miura, Y.; Suzuki, K.; Morooka, S.; Shobu, T. Stress Measurement of Stainless Steel Piping Welds by Complementary Use of High-Energy Synchrotron X-rays and Neutrons. Quantum Beam Sci. 2024, 8, 1. https://doi.org/10.3390/qubs8010001
Miura Y, Suzuki K, Morooka S, Shobu T. Stress Measurement of Stainless Steel Piping Welds by Complementary Use of High-Energy Synchrotron X-rays and Neutrons. Quantum Beam Science. 2024; 8(1):1. https://doi.org/10.3390/qubs8010001
Chicago/Turabian StyleMiura, Yasufumi, Kenji Suzuki, Satoshi Morooka, and Takahisa Shobu. 2024. "Stress Measurement of Stainless Steel Piping Welds by Complementary Use of High-Energy Synchrotron X-rays and Neutrons" Quantum Beam Science 8, no. 1: 1. https://doi.org/10.3390/qubs8010001