Orientation dependence of elastocaloric effect in Ni50Mn30Ga20 single crystals

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Orientation dependence of elastocaloric effect in Ni50Mn30Ga20 single crystals	3 MB	Adobe Acrobat PDF	Read	Download
DOI Доступ к ресурсу на сайте издателя			10.1016/j.jallcom.2021.160553

Title: Orientation dependence of elastocaloric effect in Ni50Mn30Ga20 single crystals
Creator: Surikov, Nikita Yu.
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Panchenko, Elena Yu.
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Timofeeva, Ekaterina E.
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Tagiltsev, Anton I.
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Chumlyakov, Yuri I.
Date: 2021
DOI: 10.1016/j.jallcom.2021.160553
Description: In this study, the orientation dependence of the elastocaloric effect and superelasticity in Ni50Mn30Ga20 single crystals undergoing L21–10M/14M–L10 martensitic transformations was investigated. The maximum value of the adiabatic temperature change ΔTad at reverse stress-induced martensitic transformations was shown to weakly depends on the orientation and equals 10.8 and 12.3 K in compression along the [001] and [011] directions, respectively. The superelasticity and elastocaloric effect temperature intervals were determined from the crystal orientation and were 80 K from 373 to 453 K for [001]-oriented crystals and 30 K from 373 to 403 K for [011]-oriented crystals. The strong orientation dependence of stress hysteresis Δσ (Δσ = 50–60 MPa for [001]-oriented crystals and Δσ = 110–142 MPa for [011]-oriented crystals) did not significantly affect the ΔTad, but determined the efficiency of the material for practical use as a solid state cooling device. The factors influencing the ΔTad(T) dependence were analyzed.