0384602 - ÚJF 2013 RIV US eng J - Journal Article
Woo, W. - Em, Vt. - Seong, B. S. - Mikula, Pavol - An, G.B.
Residual stress determination in a thick ferritic steel weld plate using neutron diffraction.
Journal of Materials Science. Roč. 47, č. 14 (2012), s. 5617-5623. ISSN 0022-2461. E-ISSN 1573-4803
R&D Projects: GA ČR GAP204/10/0654; GA AV ČR KJB100480901
Institutional support: RVO:61389005
Keywords : optimization * depth
Subject RIV: BM - Solid Matter Physics ; Magnetism
Impact factor: 2.163, year: 2012

The distribution of residual stresses was determined through the thickness of a 50-mm thick ferritic steel weld plate using (110) and/or (211) diffraction peaks. We proposed a two-peak combined methodology, which uses (110) and (211) peaks designed to have neutron wavelengths of 2.39 and 1.55 , respectively, in order to locate the neutron cross-section at each local minimum. The result shows that the available penetration path length can be maximized by (110) diffraction for the transmission geometry and (211) diffraction for the reflection geometry of the plate specimen. Furthermore, the stress components by the two peaks were similar to the results of the conventional one-peak measurement due to the same diffraction elastic constants between the (110) and (211) peaks in the bcc ferritic steel. Such appropriately combined two-peak method can significantly enhance the deep penetration capability for the determination of residual stresses in an extra thick steel plate specimen
Permanent Link: http://hdl.handle.net/11104/0214190