Electron Microscopy Study of Metastable Shape Memory Cu–Al–Ni Alloys

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 structur...

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Bibliographic Details
Published in:Physics of metals and metallography 2021-11, Vol.122 (11), p.1112-1120
Main Authors: Pushin, V. G., Kuranova, N. N., Makarov, V. V., Svirid, A. E., Uksusnikov, A. N.
Format: Article
Language:English
Subjects:
Aluminum base alloys
Analysis
Chemistry and Materials Science
Copper
Crystal defects
Crystallography
Degassing of metals
Diffusion
Electric fields
Electric properties
Electron microscopy
Fine structure
Magnetic permeability
Martensitic transformations
Materials Science
Metallic Materials
Metals
Microscopy
Nickel
Phase Transformations
Scattering
Shape memory alloys
Structure
Substructures (crystalline)
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Summary: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 β 1 → and β 1 → is suggested.
ISSN:0031-918X
1555-6190
DOI:10.1134/S0031918X21110119