0496714 - ÚJF 2019 RIV US eng C - Conference Paper (international conference)
Mikula, Pavol - Massimo, R. - Šaroun, Jan - Vrána, Miroslav
High-Resolution Neutron Diffraction Setting for Studies of Macro- and Microstrains in Polycrystalline Materials.
Materials Research Proceedings. Vol. 6. Millersville: Matarials Research Forum LLC, 2018, s. 63-68. ISBN 978-1-945291-88-3.
[European Conference on Residual Stresses - ECRS10. Leuven (BE), 11.09.2018-14.09.2018]
R&D Projects: GA MŠMT LM2015056; GA ČR GC16-08803J
Institutional support: RVO:61389005
Keywords : neutron diffraction * bent perfect crystals * Bragg diffraction optics * polycrystals * strains
OECD category: Condensed matter physics (including formerly solid state physics, supercond.)

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 Delta d/d resolution (d-lattice spacing) of about 4x10-3 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.
Permanent Link: http://hdl.handle.net/11104/0289370