Abstract
Neutron diffraction is a powerful tool for investigations of residual stresses in bulk polycrystalline samples. The method is based on measuring the relative change in the spacing, d, in the stressed lattice with respect to the reference, or stress-free, spacing d0. Therefore, the precision of measuring the stress strongly depends on the precision of measuring d0. Conventional stress-free comb sample with teeth in the normal direction considerably simplifies measurement of d0 in welds. However, it has been shown that in a thick weld, a “too long tooth” may contain residual stress. In this study, the idea of two-directional comb sample is proposed. Experiments have shown more complete stress relief in this comb type.
Similar content being viewed by others
REFERENCES
M. E. Fitzpatrick and A. Lodini, Analysis of Residual Stress by Diffraction using Neutron and Synchrotron Radiation (Taylor & Francis, London, 2003).
G. A. Webster, Polycrystalline Materials – Determinations of Residual Stresses by Neutron Diffraction (ISO/TTA3 Technology Trends Assessment, Geneva, 2001).
P. J. Withers, J. Appl. Crystallogr. 37, 596 (2004).
P. J. Withers, J. Appl. Crystallogr. 37, 607 (2004).
M. T. Hutchings, P. J. Withers, T. M. Holden, and T. Lorentzen, Introduction to the Characterization of Residual Stress by Neutron Diffraction (Taylor & Francis, London, 2005).
A. Paradowska, T. R. Finlayson, J. W. H. Price, R. Ibrahim, A. Steuwer, and M. Ripley, Phys. B (Amsterdam, Neth.) 385–386, 904 (2006).
M. Rogante, Phys. B (Amsterdam, Neth.) 276, 202 (2000).
D. J. Hughes, M. N. James, D. G. Hatting, and P. J. Webster, J. Neutron Res. 11, 289 (2003).
G. A. Webster and R. C. Wimpory, J. Neutron Res. 9, 281 (2001).
P. J. Webster, N. Ananthaviravakumar, D. J. Hughes, G. Mills, V. Preston, H. R. Shercliff, and P. J. Withers, Appl. Phys. A: Mater. Sci. Process. 74, 1421 (2002).
S. Ganguly, L. Edwards, and M. E. Fitzpatrick, Mater. Sci. Eng., A 528, 1226 (2011).
V. T. Em, I. D. Karpov, V. A. Somenkov, V. P. Glazkov, A. M. Balagurov, V. V. Sumin, P. Mikula, and J. Ŝaroun, Phys. B (Amsterdam, Neth.) 551, 413 (2018).
ACKNOWLEDGMENTS
This work was performed using the equipment of Unique Scientific Facility NRC IR-8.
Author information
Authors and Affiliations
Corresponding author
Rights and permissions
About this article
Cite this article
Karpov, I.D., Em, V.T. & Mikula, P. Two-Directional Stress-Free Comb Sample for Weld Study by Neutron Diffraction. J. Surf. Investig. 14 (Suppl 1), S82–S84 (2020). https://doi.org/10.1134/S1027451020070204
Received:
Revised:
Accepted:
Published:
Issue Date:
DOI: https://doi.org/10.1134/S1027451020070204