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MICROSTRUCTURE AND PROPERTIES OF METASTABLE (α+β) SHAPE MEMORY ALLOY Cu–41 WT.%Zn SUBJECTED TO CRYOTHERMAL AND MECHANOCYCLING
- Authors: Kuranova N.N.1, Marchenkov V.V.1, Pushin V.G.2, Rasposienko D.Y.1, Svirid A.E.1, Afanas'ev S.V.1, Fominykh B.M.1
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Affiliations:
- Mikheev Institute of Metal Physics, Ural Branch, Russian Academy of Sciences
- Mikheev Institute of Metal Physics, Ural Branch, Russian Academy of Science
- Issue: Vol 126, No 6 (2025)
- Pages: 698-707
- Section: СТРУКТУРА, ФАЗОВЫЕ ПРЕВРАЩЕНИЯ И ДИФФУЗИЯ
- URL: https://ruspoj.com/0015-3230/article/view/692730
- DOI: https://doi.org/10.31857/S0015323025060083
- ID: 692730
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Abstract
Structural and phase transformations and properties of (a+b) Cu–41 wt%Zn shape memory alloy were studied depending on cryothermal and mechanocycling modes. The temperatures of the start and finish of the direct and reverse martensitic transformations are determined by the temperature dependences of elec-trical resistance. The mechanical properties were measured in mechanocyclic tensile tests in austenitic and martensitic states. Methods of optical, scanning and transmission electron microscopy and X-ray phase analysis were used in structural studies. An increase in the critical temperatures of the start of direct and reverse thermoelastic martensitic transformations (by no more than 25°) with an increase in the number of thermal cycles “cooling–heating” was revealed. An increase in tweed contrast on electron microscopic images and diffuse effects on electron diffraction patterns on B2-austenite is shown with an increase in the number of cryothermocycles. An increase in dislocation density due to phase locking during thermal cycling was found. The low-temperature effect of ferroelasticity in the alloy has been established.
About the authors
Nataliya Nikolaevna Kuranova
Mikheev Institute of Metal Physics, Ural Branch, Russian Academy of Sciences
Author for correspondence.
Email: kuranova@imp.uran.ru
ORCID iD: 0000-0002-5330-7909
кандидат физико-математических наук, старший научный сотрудник, лаборатория цветных сплавов
Russian Federation, Ekaterinburg, 620108 RussiaVyacheslav Victorovich Marchenkov
Mikheev Institute of Metal Physics, Ural Branch, Russian Academy of Sciences
Email: march@imp.uran.ru
Russian Federation, Ekaterinburg, 620108 Russia
Vladimir Grigorievich Pushin
Mikheev Institute of Metal Physics, Ural Branch, Russian Academy of Science
Email: pushin@imp.uran.ru
Russian Federation, Ekaterinburg, 620108 Russia
Dmitriy Yurievich Rasposienko
Mikheev Institute of Metal Physics, Ural Branch, Russian Academy of Sciences
Email: rasposienko@imp.uran.ru
Russian Federation, Ekaterinburg, 620108 Russia
Alexey Eduardovich Svirid
Mikheev Institute of Metal Physics, Ural Branch, Russian Academy of Sciences
Email: svirid@imp.uran.ru
Russian Federation, Ekaterinburg, 620108 Russia
Sergey Victorovich Afanas'ev
Mikheev Institute of Metal Physics, Ural Branch, Russian Academy of Sciences
Email: asv987@mail.ru
Russian Federation, Ekaterinburg, 620108 Russia
Bogdan Mikhailovich Fominykh
Mikheev Institute of Metal Physics, Ural Branch, Russian Academy of Sciences
Email: bogdan.fominyh@mail.ru
Russian Federation, Ekaterinburg, 620108 Russia
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