Thermal- and stress-induced martensitic transformations in [0 0 1]-oriented Ni44Fe19Ga27Co10 single crystals E. E. Timofeeva, E. Yu. Panchenko, M. V. Zherdeva [et al.]
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ArticleContent type: Текст Media type: электронный Subject(s): мартенситные превращения | сверхэластичность | монокристаллы | микроструктураGenre/Form: статьи в журналах Online resources: Click here to access online
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Materials letters Vol. 310. P. 131477 (1-4)Abstract: The microstructures and martensitic transformations upon cooling/heating, and under a compressive load have been studied for [001]-oriented Ni44Fe19Ga27Co10 (at.%) single crystals after growth and following annealing at 1448K for 1h, followed by quenching. Heat treatment determined the microstructure of the high-temperature phase (crystal lattice, the presence of γ-phase particles, and the formation of B2-phase nanodomains). A wide superelasticity temperature range of 277K was found. Annealing led to an 80K increase in the martensitic transformations temperatures, widening of transformations intervals, and an increase in the strength properties of the high-temperature phase by 100MPa, which led to a shift of the superelasticity range towards high temperature.
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The microstructures and martensitic transformations upon cooling/heating, and under a compressive load have been studied for [001]-oriented Ni44Fe19Ga27Co10 (at.%) single crystals after growth and following annealing at 1448K for 1h, followed by quenching. Heat treatment determined the microstructure of the high-temperature phase (crystal lattice, the presence of γ-phase particles, and the formation of B2-phase nanodomains). A wide superelasticity temperature range of 277K was found. Annealing led to an 80K increase in the martensitic transformations temperatures, widening of transformations intervals, and an increase in the strength properties of the high-temperature phase by 100MPa, which led to a shift of the superelasticity range towards high temperature.
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