Comparative Neutron and Synchrotron X-Ray Diffraction Studies to Determine Residual Stress on an As-Welded AA2024 Plate

Abstract:

The residual stress field in a VPPA welded AA2024 coupon sample was measured by neutron diffraction. A similar sample was measured using synchrotron X-rays to determine the inplane strain directions. The macrostrain obtained from both sources compares well in spite of the significant difference in gauge volume and diffraction geometry. The result confirms the repeatability of the weld process and also shows good correspondence between the two diffraction processes.

• Periodical: Materials Science Forum (Volumes 490-491)
• Pages: 223-228
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.490-491.223
• Online since: July 2005
• Authors: S. Ganguly, Michael E. Fitzpatrick, Lyndon Edwards
• Keywords: Neutron X-Ray Diffraction, Residual Stress, Synchrotron X-Ray Diffraction, Weld Stress

References

[1] A. Heinz, A. Haszler, C. Keidel, S. Moldenhauer, R. Benedictus, and W.S. Miller: Materials Science and Engineering, 2000. A280: pp.102-107.

DOI: 10.1016/s0921-5093(99)00674-7

[2] I.C. Noyan and J.B. Cohen: Residual stress - Measurement by diffraction and interpretation. (Springer-Verlag, New York 1987).

[3] G.L. Serrano. Variable polarity plasma arc welding(VPPAW) of 12. 5mm thick AA-2024 T351, AA-7150 T651 and AA-7150 W51. in 2nd International conference on recent developments and future trends in welding technology. 2003. Kings Norton Library, Cranfield University.

[4] B. Clausen, T. Lorentzen, and T. Leffers: Acta Mater, 1998. 46: pp.3087-3098.

[5] V. Hauk: Structural and Residual Stress Analysis by Non-destructive Method. (Elsevier, 1977).

[6] T. Lorentzen, Anisotropy of Lattice Strain Response, in Analysis of Residual Stresses by Diffraction Using Neutron and Synchrotron Radiation, M.E. Fitzpatrick and A. Lodini, Editors. 2003, Taylor and Francis: London. pp.114-130. a) b).

DOI: 10.1201/9780203608999.ch7