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A novel method of experimental determination of grain stresses and critical resolved shear stresses for slip and twin systems in a magnesium alloy
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SYSNO ASEP 0577193 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title A novel method of experimental determination of grain stresses and critical resolved shear stresses for slip and twin systems in a magnesium alloy Author(s) Kot, P. (PL)
Wronski, M. (PL)
Baczmanski, A. (PL)
Ludwik, A. (PL)
Wroński, S. (PL)
Wierzbanowski, K. (PL)
Scheffzük, Ch. (DE)
Pilch, Jan (UJF-V) RID
Farkas, Gergely (UJF-V) RID, ORCID, SAINumber of authors 9 Article number 113469 Source Title Measurement. - : Elsevier - ISSN 0263-2241
Roč. 221, NOV (2023)Number of pages 26 s. Publication form Print - P Language eng - English Country GB - United Kingdom Keywords Neutron diffraction measurement ; Crystallographic slip ; Twinning ; Critical resolved shear stress ; Elastoplastic deformation ; Magnesium alloy OECD category Materials engineering R&D Projects EF16_013/0001812 GA MŠMT - Ministry of Education, Youth and Sports (MEYS) Research Infrastructure CICRR - 90241 - Centrum výzkumu Řež s.r.o. Method of publishing Open access Institutional support UJF-V - RVO:61389005 UT WOS 001081720000001 EID SCOPUS 85171625999 DOI 10.1016/j.measurement.2023.113469 Annotation A novel original method of determination of stresses and critical resolved shear stresses (CRSSs) using neutron diffraction was proposed. In this method, based on the crystallite group method, the lattice strains were measured in different directions and using different reflections hkl during uniaxial deformation of magnesium alloy AZ31. The advantage of this method is that the stresses for groups of grains having similar orientations can be determined directly from measurement without any models used for data interpretation. The obtained results are unambiguous and do not depend on the models assumptions as in previous works. Moreover, it was possible for the first time to determine the uncertainty of the measured CRSS values and local stresses at groups of grains.The used methodology allowed for the determination of stress partitioning between grains having different orientations and for an explanation of the anisotropic mechanical behaviour of the strongly textured alloy. Finally, the CRSS values allowed for the validation of the type of intergranular interaction assumed in the elastic-plastic self-consistent model and for a significant reduction of the number of unknown parameters when the model is adjusted to the experimental data. Workplace Nuclear Physics Institute Contact Markéta Sommerová, sommerova@ujf.cas.cz, Tel.: 266 173 228 Year of Publishing 2024 Electronic address https://doi.org/10.1016/j.measurement.2023.113469
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