On the Resolution in Strain/Stress Measurements on Bulk Polycrystalline Samples by 3-Axis Neutron Diffractometer

0564991 - ÚJF 2023 RIV US eng J - Journal Article
Mikula, Pavol - Ryukhtin, Vasil - Michalcová, A. - Em, V.
On the Resolution in Strain/Stress Measurements on Bulk Polycrystalline Samples by 3-Axis Neutron Diffractometer.
Physics of Metals and Metallography. Roč. 123, č. 13 (2022), s. 1348-1353. ISSN 0031-918X. E-ISSN 1555-6190
R&D Projects: GA MŠMT EF16_013/0001812; GA MŠMT EF16_013/0001794
Grant - others:AV ČR(CZ) StrategieAV21/23
Program: StrategieAV
Research Infrastructure: CANAM II - 90056; Reactors LVR-15 and LR-0 II - 90120
Institutional support: RVO:61389005
Keywords : neutron diffraction * Bragg diffraction optics * residual stress measurement
OECD category: Materials engineering
Impact factor: 1.2, year: 2022
Method of publishing: Limited access
https://doi.org/10.1134/S0031918X21100811

Important resolution properties of the high-resolution 3-axis neutron diffraction set-up were investigated in the frame of feasibility of its use for strain/stress measurements on bulk polycrystalline samples. The strain analysis was carried out by rocking the BPC-analyzer and the neutron signal registered by a point detector. The so-called rocking curve then provided a sample diffraction profile and could reflect the lattice or structural changes. In comparison with a conventional 2-axis set-up, this instrument alternative could be successfully applied, namely, in the strain/stress measurements in bulk samples exposed to an external load, e.g. in tension/compression rig, in aging machine etc. and provide average strain values over a large irradiated volume of the sample.
Permanent Link: https://hdl.handle.net/11104/0339839