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Stability of incommensurately modulated\nNi.sub.50./sub.Mn.sub.27./sub.Ga.sub.22./sub.Fe.sub.1./sub. 10M martensite under uniaxial tensile stress
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SYSNO ASEP 0584863 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Stability of incommensurately modulated
Ni50Mn27Ga22Fe1 10M martensite under uniaxial tensile stressAuthor(s) Vinogradova, M. (FI)
Sozinov, A. (FI)
Straka, Ladislav (FZU-D) ORCID
Veřtát, Petr (FZU-D) RID, ORCID
Heczko, Oleg (FZU-D) RID, ORCID
Zelený, M. (CZ)
Chulist, R. (PL)
Ullakko, K. (FI)Number of authors 8 Article number 116096 Source Title Scripta Materialia. - : Elsevier - ISSN 1359-6462
Roč. 247, July (2024)Number of pages 6 s. Language eng - English Country GB - United Kingdom Keywords magnetic shape memory ; Ni-Mn-Ga ; X-ray diffraction ; incommensurately modulated crystal structure Subject RIV BM - Solid Matter Physics ; Magnetism OECD category Condensed matter physics (including formerly solid state physics, supercond.) R&D Projects GA21-06613S GA ČR - Czech Science Foundation (CSF) EH22_008/0004591 GA MŠMT - Ministry of Education, Youth and Sports (MEYS) EF18_053/0016627 GA MŠMT - Ministry of Education, Youth and Sports (MEYS) Method of publishing Open access Institutional support FZU-D - RVO:68378271 UT WOS 001219614300001 EID SCOPUS 85189145186 DOI https://doi.org/10.1016/j.scriptamat.2024.116096 Annotation We investigate the incommensurately modulated crystal structure in the Ni50Mn27Ga22Fe1 magnetic shape memory alloy. We focus on temperature- and stress-induced changes, particularly measuring the a and b lattice parameters and the monoclinic angle. The in-situ XRD experiment shows that the thermally-induced commensurate-incommensurate (C-IC) transition coincides with the change of the average lattice symmetry from monoclinic to orthorhombic. The thermally-induced IC structure is stable under uniaxial tensile stress along the a-axis for deformation ε < 0.8 %. A mixture of the IC and C structures appears for ε > 0.8 % and the changes become irreversible. The volume fraction of the C structure further increases with increasing deformation. These results provide vital initial insights into the structural evolution of Ni-Mn-Ga alloys and enable us to establish the role of C and IC structures in their extraordinarily high mobility of twin boundaries. Workplace Institute of Physics Contact Kristina Potocká, potocka@fzu.cz, Tel.: 220 318 579 Year of Publishing 2025 Electronic address https://hdl.handle.net/11104/0352688
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