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High-Resolution Residual Strain/Stress Measurements on Three Axis Neutron Diffractometer
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SYSNO ASEP 0551754 Druh ASEP J - Článek v odborném periodiku Zařazení RIV J - Článek v odborném periodiku Poddruh J Ostatní články Název High-Resolution Residual Strain/Stress Measurements on Three Axis Neutron Diffractometer Tvůrce(i) Mikula, Pavol (UJF-V) RID, ORCID, SAI
Šaroun, Jan (UJF-V) RID, ORCID, SAI
Ryukhtin, Vasil (UJF-V) RID, ORCID, SAICelkový počet autorů 3 Zdroj.dok. AMR - Advanced Materials Research. - : Scientific.Net - ISSN 1662-8985
Roč. 1166, SEP (2021), s. 33-40Poč.str. 8 s. Forma vydání Online - E Jazyk dok. eng - angličtina Země vyd. CH - Švýcarsko Klíč. slova neutron diffraction ; Bragg diffraction optics ; residual stress measurement Vědní obor RIV BM - Fyzika pevných látek a magnetismus Obor OECD Condensed matter physics (including formerly solid state physics, supercond.) CEP EF16_013/0001794 GA MŠMT - Ministerstvo školství, mládeže a tělovýchovy LM2018111 GA MŠMT - Ministerstvo školství, mládeže a tělovýchovy Výzkumná infrastruktura Reactors LVR-15 and LR-0 II - 90120 - Centrum výzkumu Řež s.r.o. Způsob publikování Omezený přístup Institucionální podpora UJF-V - RVO:61389005 DOI 10.4028/www.scientific.net/AMR.1166.33 Anotace Focusing 3-axis diffractometer set-up equipped with bent perfect crystal (BPC) monochromator and analyzer offers the sensitivity in determination of strains Dd/d < 10-4 in polycrystalline materials which is about one order of magnitude higher with respect to that of conventional 2-axis neutron scanners. It also offers possibility of line profile analysis for reasonable sample volumes and counting times. In this paper, the feasibility of using the 3-axis set-up even for measurements of rather large bulk polycrystalline samples with an acceptable resolution is presented. As the 3-axis set-up exploits focusing in real and momentum space, by a proper adjustment of the curvature of the analyzer, a high-resolution determination of the lattice changes can also be achieved even on large irradiated gauge volumes, though with a slightly relaxed resolution. It can be successfully exploited namely, in the strain/stress measurements on samples exposed to an external load, e.g. in tension/compression rig, in aging machine etc. In addition to the original performance where the analysis is carried out by rocking the BPC analyzer and the neutron signal registered by a point detector, a new alternative is offered which uses a fixed rocking angle position of the analyzer and the detector signal is registered by a one-dimensional position sensitive detector (PSD). This trick makes possible in some cases the elastic strain/stress measurements considerably faster and thus reduces the drawback of the time consuming step-by-step analysis. Pracoviště Ústav jaderné fyziky Kontakt Markéta Sommerová, sommerova@ujf.cas.cz, Tel.: 266 173 228 Rok sběru 2022 Elektronická adresa https://www.scientific.net/AMR.1166.33
Počet záznamů: 1