Introduction to the Characterization of Residual Stress by Neutron Diffraction

2005 ◽  
Author(s):  
M.T. Hutchings ◽  
P.J. Withers ◽  
T.M. Holden ◽  
Torben Lorentzen
Keyword(s):  
Residual Stress ◽  
Neutron Diffraction

Residual stress characterization of a fabrication weld from the VICTORIA-Class submarine pressure hull: revealing the Unseen Special issue on Neutron Scattering in Canada.

2010 ◽  
Vol 88 (10) ◽  
pp. 759-770 ◽  
Author(s):  
R. J. McGregor ◽  
R. B. Rogge
Keyword(s):  
Residual Stress ◽  
Neutron Diffraction ◽  
Three Dimensional ◽  
Base Material ◽  
National Research Council ◽  
Fatigue And Fracture ◽  
Operational Envelope ◽  
Rare Opportunity ◽  
Complementary Study

Explicit understanding of the residual-stress character of primary submarine pressure hull weldments will improve the fidelity of numerical analysis and experimentation supporting operational envelope and design life. A length of circumferential-seam closure weld was contained within a section of hull plate removed from the HMCS VICTORIA during the extended docking work period (EDWP) refit operations. This has provided a rare opportunity for detailed characterization of the as-received condition of this common weld-type from original vessel assembly. In collaboration with the Canadian Neutron Beam Centre of the National Research Council (NRC), a program was conducted to study this weld using neutron diffraction. Neutron diffraction is able to survey nondestructively through the section thickness, providing a three-dimensional characterization, while leaving the specimen intact for complementary study by other methods. Results indicate tensile stress peaks of up to 80% of the base-material yield stress. Understanding the three-dimensional behaviour of residual stress in this type of weld provides a valuable resource to the numerical modelling community. The results can also support fatigue and fracture experimental work and serve to confirm and improve the interpretation of the existing body of “surface-only” work conducted on similar welds.

Characterization of residual stress in laser melting deposited CoCrFeMnNi high entropy alloy by neutron diffraction

2020 ◽  
Vol 263 ◽  
pp. 127247
Author(s):  
H.G. Li ◽  
T.L. Lee ◽  
W. Zheng ◽  
Y.Z. Lu ◽  
H.B.C. Yin ◽  
...  
Keyword(s):  
Residual Stress ◽  
Neutron Diffraction ◽  
High Entropy Alloy ◽  
Laser Melting ◽  
High Entropy

Characterization of the three-dimensional residual stress distribution in SiC bulk crystals by neutron diffraction

CrystEngComm ◽  
2017 ◽  
Vol 19 (43) ◽  
pp. 6527-6532 ◽  
Author(s):  
Xuejian Xie ◽  
Xiaobo Hu ◽  
Xiufang Chen ◽  
Fafu Liu ◽  
Xianglong Yang ◽  
...  
Keyword(s):  
Residual Stress ◽  
Stress Distribution ◽  
Neutron Diffraction ◽  
Three Dimensional ◽  
Diffraction Method ◽  
Residual Stress Distribution ◽  
Bulk Crystals ◽  
First Time ◽  
Neutron Diffraction Method

The neutron diffraction method was adopted to study the three-dimensional residual stress distribution in SiC bulk crystals for the first time.

Residual stress characterization of steel TIG welds by neutron diffraction and by residual magnetic stray field mappings

2017 ◽  
Vol 426 ◽  
pp. 580-587 ◽  
Author(s):  
Robert Stegemann ◽  
Sandra Cabeza ◽  
Viktor Lyamkin ◽  
Giovanni Bruno ◽  
Andreas Pittner ◽  
...  
Keyword(s):  
Residual Stress ◽  
Neutron Diffraction ◽  
Stray Field

Characterization of Welding-Induced Residual Stress Using Neutron Diffraction Technique

2017 ◽  
Vol 139 (6) ◽  
Author(s):  
M. Clyde Zondi ◽  
Andrew Venter ◽  
Deon Marais ◽  
Clinton Bemont
Keyword(s):  
Residual Stress ◽  
Neutron Diffraction ◽  
Pressure Vessel ◽  
Pressure Vessels ◽  
Stress Effect ◽  
Industrial Operations ◽  
Plant Equipment ◽  
Hoop Stresses ◽  
Neutron Diffraction Technique

Pressure vessels comprise critical plant equipment within industrial operations. The fact that the vessel operates under pressure, and may carry toxic, dangerous, or hazardous contents, necessitates that care is taken to ensure safety of humans operating it and the environment within which it operates. Residual stress developed during welding of pressure vessel structures can adversely affects fatigue life (mean stress effect) of such structure and lead to corrosion crack growth. The present study applies the neutron diffraction (ND) technique to formulate the stress field distribution of a nozzle-to-shell weld joint of a pressure vessel. A number of experiments are conducted using the submerged arc welding (SAW) process at various parametric combinations to develop a number of specimens with different stress profiles. It is shown that the hoop stresses close to the weld center line (WCL) are highly tensile and have values close to the yield strength of the material. The ideal parametric combination is also determined based on the results with lowest stresses. The results obtained in this study are congruent to the results of similar studies in the literature.

Structural, electrical characterization and oxygen-diffusion paths in LaSrGa1-xMgxO4-δ (x=0.0-0.2) layered perovskites: an impedance spectroscopy and neutron diffraction study

2021 ◽  
Author(s):  
Carlos Marino ◽  
Juan Basbus ◽  
Ana L. Larralde ◽  
Jose Antonio Alonso ◽  
Maria Teresa Fernandez-Diaz ◽  
...  
Keyword(s):  
Impedance Spectroscopy ◽  
Neutron Diffraction ◽  
Structural Characterization ◽  
Oxygen Diffusion ◽  
Electrical Characterization ◽  
Neutron Diffraction Study ◽  
Oxygen Ions ◽  
Diffusion Paths ◽  
Layered Perovskites

This work presents the results of the structural characterization of LaSrGa1-xMgxO4-δ oxides with x=0.0-0.2 (LSGM'); these oxides with layered K2NiF4-type structure are potential electrolytes of oxygen ions with applications in...

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