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High-Resolution Strain/Stress Measurements by Three-Axis Neutron Diffractometer
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SYSNO ASEP 0538369 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title High-Resolution Strain/Stress Measurements by Three-Axis Neutron Diffractometer Author(s) Mikula, Pavol (UJF-V) RID, ORCID, SAI
Ryukhtin, Vasil (UJF-V) RID, ORCID, SAI
Šaroun, Jan (UJF-V) RID, ORCID, SAI
Strunz, Pavel (UJF-V) RID, ORCID, SAINumber of authors 4 Article number 5449 Source Title Materials. - : MDPI
Roč. 13, č. 23 (2020)Number of pages 7 s. Publication form Online - E Language eng - English Country CH - Switzerland Keywords residual stresses ; neutron diffraction ; three axis setting ; high resolution ; bent crystal monochromator ; bent crystal analyzer Subject RIV BM - Solid Matter Physics ; Magnetism OECD category Nuclear related engineering R&D Projects LM2015056 GA MŠMT - Ministry of Education, Youth and Sports (MEYS) EF16_013/0001794 GA MŠMT - Ministry of Education, Youth and Sports (MEYS) Research Infrastructure Reactors LVR-15 and LR-0 II - 90120 - Centrum výzkumu Řež s.r.o. Method of publishing Open access Institutional support UJF-V - RVO:61389005 UT WOS 000597561100001 EID SCOPUS 85097011271 DOI 10.3390/ma13235449 Annotation Resolution properties of the unconventional high-resolution neutron diffraction three-axis setup for strain/stress measurements of large bulk polycrystalline samples are presented. Contrary to the conventional two-axis setups, in this case, the strain measurement on a sample situated on the second axis is carried out by rocking the bent perfect crystal (BPC) analyzer situated on the third axis of the diffractometer. Thus, the so-called rocking curve provides the sample diffraction profile. The neutron signal coming from the analyzer is registered by a point detector. This new setup provides a considerably higher resolution (at least by a factor of 5), which however, requires a much longer measurement time. The high-resolution neutron diffraction setting can be effectively used, namely, for bulk gauge volumes up to several cubic centimeters, and for plastic deformation studies on the basis of the analysis of diffraction line profiles, thus providing average values of microstructure characteristics over the irradiated gauge volume. Workplace Nuclear Physics Institute Contact Markéta Sommerová, sommerova@ujf.cas.cz, Tel.: 266 173 228 Year of Publishing 2021 Electronic address https://doi.org/10.3390/ma13235449
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