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The Influence of Heat Treatment on the Deformation Properties of Ni49Fe18Ga27Co6 Alloy Crystals Compressed in the [011] Axis Direction

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Abstract

Stress–strain diagrams (σ–ε curves) have been studied during uniaxial compression of Ni49Fe18Ga27Co6 alloy single crystals in the [011] axis direction for the initial samples and those after 15-min annealing at 1373 K with subsequent quenching in water. It was established that the σ–ε curves of initial crystals exhibited a one-stage character and showed a single stress decay, whereas the curves of heat-treated and quenched crystals displayed two stress decays. The shape-memory (SM) strain recovery on heating the compression-strained crystals showed an anomalous (burstlike) character. Investigation of the reproducibility of burstlike recovery of SM strain in a series of thermomechanical treatment cycles showed that the recovery took place in quenched crystals, whereas the temperature interval of SM recovery in the initial crystal grew from 1 to 12 K with increasing number of thermomechanical treatment cycles.

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Funding

This work was supported in part by the Russian Science Foundation, project no. 16-19-00129.

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Authors and Affiliations

  1. Ioffe Physical Technical Institute, Russian Academy of Sciences, 194021, St. Petersburg, Russia

    G. A. Malygin, V. I. Nikolaev, V. M. Krymov & A. V. Soldatov

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  1. G. A. Malygin
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  2. V. I. Nikolaev
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  3. V. M. Krymov
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  4. A. V. Soldatov
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Correspondence to V. I. Nikolaev.

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The authors declare that they have no conflict of interest.

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Translated by P. Pozdeev

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Malygin, G.A., Nikolaev, V.I., Krymov, V.M. et al. The Influence of Heat Treatment on the Deformation Properties of Ni49Fe18Ga27Co6 Alloy Crystals Compressed in the [011] Axis Direction. Tech. Phys. Lett. 46, 260–262 (2020). https://doi.org/10.1134/S106378502003027X

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  • DOI: https://doi.org/10.1134/S106378502003027X

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