High-Resolution Neutron Diffraction Setting for Studies of Macro- and Microstrains in Polycrystalline Materials
P. Mikula, M. Rogante, J. Šaroun, M. Vránadownload PDF
Abstract. On the basis of our previous experience [1-4], a unique three axis high-resolution experimental setting for nondestructive strain measurements which is based on neutron Bragg diffraction optics with cylindrically bent perfect crystals is presented. The use of focusing in real and namely, in momentum space, from FWHM of diffraction lines the three axis setting provides the d/d resolution (d-lattice spacing) of about 4×10-3 for bulk samples. It permits studies not only macrostrain components resulting from angular shifts of diffraction peaks but also estimations of microstrains in a plastically deformation region by means of profile-broadening analysis. The feasibility of the experimental setting is demonstrated on low carbon steel shear deformed steel wires.
Neutron Diffraction, Bent Perfect Crystals, Bragg Diffraction Optics, Polycrystals, Strains
Published online 9/11/2018, 6 pages
Copyright © 2018 by the author(s)
Published under license by Materials Research Forum LLC., Millersville PA, USA
Citation: P. Mikula, M. Rogante, J. Šaroun, M. Vrána, ‘High-Resolution Neutron Diffraction Setting for Studies of Macro- and Microstrains in Polycrystalline Materials’, Materials Research Proceedings, Vol. 6, pp 63-68, 2018
The article was published as article 11 of the book Residual Stresses 2018
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