HIGH-TEMPERATURE SUPERELASTICITY IN [001]-ORIENTED Ni54Mn12Ga25Fe9 SINGLE CRYSTALS UNDER COMPRESSION
- Authors: Dmitrienko M.S.1, Timofeeva E.E.1, Panchenko E.Y.1, Zherdeva M.V.1, Tokhmetova A.1, Tagiltsev A.I.1, Chumlyakov Y.I.1
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Affiliations:
- National Research Tomsk State University
- Issue: Vol 126, No 8 (2025)
- Pages: 936-942
- Section: ПРОЧНОСТЬ И ПЛАСТИЧНОСТЬ
- URL: https://ogarev-online.ru/0015-3230/article/view/301610
- DOI: https://doi.org/10.7868/S3034621525080115
- ID: 301610
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Abstract
The high-temperature superelasticity, the temperature dependence of critical stresses for martensite formation, and the yield strength of martensite and austenite in [001]-oriented Ni54Mn12Ga25Fe9 single crystals under compression have been studied. In as-grown and quenched single crystals the yield strength of martensite in single crystals decreased by 640–700 MPa with increases in test temperature, while the strain hardening coefficient increases an order. At high temperatures, this results in the yield strength of
martensite being achieved, the plastic deformation occurring during the martensitic transformation, and the superelasticity range ending. Annealing at 1273 K for 4 hours with following quenching leads to an increase in the yield strength of martensite by 250–350 MPa over the entire temperature range, compared
to as-grown single crystals. This causes an expansion of the superelasticity range in quenched single crystals from ΔTSE = 115 K (308–423 K) to ΔTSE = 155 K (318–473 K).
About the authors
Maksim S. Dmitrienko
National Research Tomsk State University
Author for correspondence.
Email: max06.2002@mail.ru
Russian Federation, Tomsk, 634050
Ekaterina E. Timofeeva
National Research Tomsk State University
Email: timofeeva_katie@mail.ru
Russian Federation, Tomsk, 634050
Elena Yu. Panchenko
National Research Tomsk State University
Email: panchenko@mail.tsu.ru
Russian Federation, Tomsk, 634050
Maria V. Zherdeva
National Research Tomsk State University
Email: zhmv98@mail.ru
Russian Federation, Tomsk, 634050
Aida Tokhmetova
National Research Tomsk State University
Email: aida-tx@mail.ru
Russian Federation, Tomsk, 634050
Anton I. Tagiltsev
National Research Tomsk State University
Email: antontgl@gmail.com
Russian Federation, Tomsk, 634050
Yuriy I. Chumlyakov
National Research Tomsk State University
Email: chum@phys.tsu.ru
Russian Federation, Tomsk, 634050
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