Cyclic stability of two-way shape memory effect in aged Ni50.3Ti32.2Hf17.5 polycrystals after various thermomechanical treatments

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Cyclic stability of two-way shape memory effect in aged Ni50.3Ti32.2Hf17.5 polycrystals after various thermomechanical treatments	5 MB	Adobe Acrobat PDF	Read	Download
DOI Доступ к ресурсу на сайте издателя			10.3390/ma16186175

Title: Cyclic stability of two-way shape memory effect in aged Ni50.3Ti32.2Hf17.5 polycrystals after various thermomechanical treatments
Creator: Panchenko, Elena Yu.
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Tagiltsev, Anton I.
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Timofeeva, Ekaterina E.
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Chumlyakov, Yuri I.
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Marchenko, Ekaterina S.
Date: 2023
DOI: 10.3390/ma16186175
Description: In the present paper, the cyclic stability of the high-temperature two-way shape memory effect was studied in high-strength Ni50.3Ti32.2Hf17.5 polycrystals after various thermomechanical treatments—training (thermocycling under stress) and stress-induced martensite aging. The effect of training and stress-induced martensite aging on the microstructure, the two-way shape memory effect, and its cyclic stability was determined. It was found out that both thermomechanical treatments induce the high-temperature two-way shape memory effect at T > 373 K, with a strain of 1.5% in tension. The influence of cyclic tests (up to 100 stress-free cycles of cooling/heating) on the two-way shape memory effect strain, the transformation temperatures, and the microstructure was established. Different degradation mechanisms of the two-way shape memory effect were established after thermocycling and stress-induced martensite aging.

Created: 14-02-2024

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Сибирский физико-технический институт Cyclic stability of two-way shape memory effect in aged Ni50.3Ti32.2Hf17.5 polycrystals after various thermomechanical treatments