Abstract
For the first time, data on the peculiarities of the structure of the Cu–Al–Ni–(B) alloys differing in the contents of alloying elements, namely, containing 10–14 wt % aluminum, 3, 4, 4.5 wt % nickel, and 0.02–0.3 wt % boron were obtained using optical, scanning, and transmission microscopy and X-ray diffraction analysis along with measurements of tensile mechanical properties. The effect of boron on the grain size, structure, phase composition, and mechanical properties of the shape-memory alloys has been studied. The localization of aluminum boride precipitates in the structure has been studied, and the effect of grain growth retardation in (α + β) and β Cu–Al–Ni–B alloys in both cast and heat-treated states has been found.
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Funding
The synthesis of the boron-containing alloys and their study in the cast and heat-treated states was financially supported by the Russian Science Foundation, project no. 22-72-00056 (https://rscf.ru/project/22-72-00056/, IMP UB RAS). Studies of forged boron-free alloys were performed in terms of state assignment of the Ministry of Science and Higher Education (theme Structure, no. 122021000033-2). The study was performed using equipment available in the Collective Access Center Testing Center for Nanotechnologies and Advanced Materials at the Mikheev Institute of Metal Physics, Ural Branch, Russian Academy of Sciences. We thank D.I. Davydov for the alloy preparation.
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Translated by N. Kolchugina
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Svirid, A.E., Kuranova, N.N., Makarov, V.V. et al. The Effect of Boron Addition on the Structure and Mechanical Properties of Cu–Al–Ni–B Alloys with a Thermoelastic Martensitic Transformation. Phys. Metals Metallogr. 124, 504–513 (2023). https://doi.org/10.1134/S0031918X23600549
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DOI: https://doi.org/10.1134/S0031918X23600549