Comparison of Residual Stress Measurements Using Neutron and X-ray Diffraction around Cold Expanded Holes

Article type: Research Article

Authors: Stefanescu, D. | Bouzina, A. | Dutta, M. | Wang, D.Q. | Fitzpatrick, M.E. | Edwards, L.

Affiliations: Department of Materials Engineering, The Open University, Walton Hall, Milton Keynes MK7 6AA, UK

Note: [] Corresponding author.

Abstract: Comparative stress measurements using neutron and X-ray data from an FTI 4% cold expanded hole in 7050 T76 aluminium alloy plate are presented. Good agreement is found between neutron and X-ray diffraction results. In combination, these results can be used to follow the effects of a −30kN under-load on the stress field around a cold expanded hole. This underload increases the depth of the compressive layer adjacent to the bore of the hole but reduces the value of the peak compressive stress.

Keywords: Neutron diffraction, X-ray diffraction, Residual stress, Cold expansion

DOI: 10.1080/10238160108200169

Journal: Journal of Neutron Research, vol. 9, no. 2-4, pp. 399-403, 2001