Abstract
Data on premartensitic states and martensitic transformations in the shape memory alloys Сu–14 wt % Al–3 wt % Ni and 13.5 wt % Al–3.5 wt % Ni were obtained using electron microscopy and X‑ray analysis together with measurements of electrical resistivity and magnetic susceptibility. The fine structure and diffuse electron scattering have been studied in detail, including in situ heating and cooling experiments. On the basis of the observed diffuse scattering and internal defects of the martensitic substructure, a crystallographic model of martensitic rearrangement β1 → \(\beta _{1}^{'}\) and β1 → \(\gamma _{1}^{'}\) is suggested.
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ACKNOWLEDGEMENTS
Authors are grateful to A.V. Korolev for carrying out magnetic measurements. The work was performed using equipment of Collaborative Access Center “Testing Center of Nanotechnology and Advanced Materials” IMP UB RAS.
Funding
The work is performed in the framework of state assignment of the Ministry of Education and Science of Russia (theme “Structure”, No. АААА-А18-118020190116-6) and in the collaborative laboratory of IMP UBRAS and UrFU.
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Translated by O. Golovnya
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Pushin, V.G., Kuranova, N.N., Makarov, V.V. et al. Electron Microscopy Study of Metastable Shape Memory Cu–Al–Ni Alloys. Phys. Metals Metallogr. 122, 1112–1120 (2021). https://doi.org/10.1134/S0031918X21110119
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DOI: https://doi.org/10.1134/S0031918X21110119