Influence of Detwinning on the Shape Memory Effect in Ni55Fe18Ga27 Single Crystals

Sergey Belyaev, Natalia Resnina, Vladimir Nikolaev, Roman Timashov, Anastasiya Saveleva, Aigul Gazizullina, Vladimir Krymov, Alexey Sibirev

Research output: Contribution to journalArticleResearchpeer-review

Abstract

Deformation mechanisms, one-way and two-way shape memory effects were studied in the mode of compression in the [011] single crystal of the Ni55Fe18Ga27 alloy where the detwinning occurred during deformation and in the [001] single crystal where the detwinning was forbidden. It was found that the [001] and [011] crystals deformed by different mechanisms during compression to 5% (reorientation was in [001] crystal, and the reorientation and detwinning were in [011] crystal) and from 15 to 20% (the 14 M → L10 transition was in [001] crystal and plastic deformation of 14 M phase was in [011]). The compression of both single crystals from 5 to 15% occurred due to the same mechanisms: the 10 M ↔ 14 M transformation and the plastic deformation of the 14 M martensite. The 14 M and L10 phases were stable under load, and they transformed to the 10 M martensite on unloading. It was shown that the crystal orientation and detwinning hardly affected the value of the one-way shape memory effect since both crystals were in the 10 M martensite after preliminary deformation. In this case, the transformation of 10 M martensite to the austenite on heating was accompanied by a strain of about 5% and this was the maximum value of the shape memory effect. It was found that the detwinning significantly affected the temperature ranges of strain recovery. In the [011] crystal, the strain recovered in a very narrow interval on heating (1-2°C), whereas in the [001] crystal the shape memory effect was observed in “normal” temperature range (~ 10°C). The detwinning resulted in the formation of a large oriented internal stress during the preliminary deformation that increased the value of the two-way shape memory effect that was observed in [011] crystals in comparison with the [001] crystals.

Original languageEnglish
Pages (from-to)4234-4240
Number of pages7
JournalJournal of Materials Engineering and Performance
Volume28
Issue number7
DOIs
StatePublished - 15 Jul 2019

Keywords

  • advanced characterization
  • deformation mechanisms
  • detwinning
  • intermetallics
  • mechanical
  • shape memory effects
  • single crystal

Scopus subject areas

  • Materials Science(all)
  • Mechanics of Materials
  • Mechanical Engineering

Cite this

@article{5753f021379b44538eb28cb18b0f3a58,
title = "Influence of Detwinning on the Shape Memory Effect in Ni55Fe18Ga27 Single Crystals",
abstract = "Deformation mechanisms, one-way and two-way shape memory effects were studied in the mode of compression in the [011] single crystal of the Ni55Fe18Ga27 alloy where the detwinning occurred during deformation and in the [001] single crystal where the detwinning was forbidden. It was found that the [001] and [011] crystals deformed by different mechanisms during compression to 5{\%} (reorientation was in [001] crystal, and the reorientation and detwinning were in [011] crystal) and from 15 to 20{\%} (the 14 M → L10 transition was in [001] crystal and plastic deformation of 14 M phase was in [011]). The compression of both single crystals from 5 to 15{\%} occurred due to the same mechanisms: the 10 M ↔ 14 M transformation and the plastic deformation of the 14 M martensite. The 14 M and L10 phases were stable under load, and they transformed to the 10 M martensite on unloading. It was shown that the crystal orientation and detwinning hardly affected the value of the one-way shape memory effect since both crystals were in the 10 M martensite after preliminary deformation. In this case, the transformation of 10 M martensite to the austenite on heating was accompanied by a strain of about 5{\%} and this was the maximum value of the shape memory effect. It was found that the detwinning significantly affected the temperature ranges of strain recovery. In the [011] crystal, the strain recovered in a very narrow interval on heating (1-2°C), whereas in the [001] crystal the shape memory effect was observed in “normal” temperature range (~ 10°C). The detwinning resulted in the formation of a large oriented internal stress during the preliminary deformation that increased the value of the two-way shape memory effect that was observed in [011] crystals in comparison with the [001] crystals.",
keywords = "advanced characterization, deformation mechanisms, detwinning, intermetallics, mechanical, shape memory effects, single crystal",
author = "Sergey Belyaev and Natalia Resnina and Vladimir Nikolaev and Roman Timashov and Anastasiya Saveleva and Aigul Gazizullina and Vladimir Krymov and Alexey Sibirev",
year = "2019",
month = "7",
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language = "English",
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Influence of Detwinning on the Shape Memory Effect in Ni55Fe18Ga27 Single Crystals. / Belyaev, Sergey; Resnina, Natalia; Nikolaev, Vladimir; Timashov, Roman; Saveleva, Anastasiya; Gazizullina, Aigul; Krymov, Vladimir; Sibirev, Alexey.

In: Journal of Materials Engineering and Performance, Vol. 28, No. 7, 15.07.2019, p. 4234-4240.

Research output: Contribution to journalArticleResearchpeer-review

TY - JOUR

T1 - Influence of Detwinning on the Shape Memory Effect in Ni55Fe18Ga27 Single Crystals

AU - Belyaev, Sergey

AU - Resnina, Natalia

AU - Nikolaev, Vladimir

AU - Timashov, Roman

AU - Saveleva, Anastasiya

AU - Gazizullina, Aigul

AU - Krymov, Vladimir

AU - Sibirev, Alexey

PY - 2019/7/15

Y1 - 2019/7/15

N2 - Deformation mechanisms, one-way and two-way shape memory effects were studied in the mode of compression in the [011] single crystal of the Ni55Fe18Ga27 alloy where the detwinning occurred during deformation and in the [001] single crystal where the detwinning was forbidden. It was found that the [001] and [011] crystals deformed by different mechanisms during compression to 5% (reorientation was in [001] crystal, and the reorientation and detwinning were in [011] crystal) and from 15 to 20% (the 14 M → L10 transition was in [001] crystal and plastic deformation of 14 M phase was in [011]). The compression of both single crystals from 5 to 15% occurred due to the same mechanisms: the 10 M ↔ 14 M transformation and the plastic deformation of the 14 M martensite. The 14 M and L10 phases were stable under load, and they transformed to the 10 M martensite on unloading. It was shown that the crystal orientation and detwinning hardly affected the value of the one-way shape memory effect since both crystals were in the 10 M martensite after preliminary deformation. In this case, the transformation of 10 M martensite to the austenite on heating was accompanied by a strain of about 5% and this was the maximum value of the shape memory effect. It was found that the detwinning significantly affected the temperature ranges of strain recovery. In the [011] crystal, the strain recovered in a very narrow interval on heating (1-2°C), whereas in the [001] crystal the shape memory effect was observed in “normal” temperature range (~ 10°C). The detwinning resulted in the formation of a large oriented internal stress during the preliminary deformation that increased the value of the two-way shape memory effect that was observed in [011] crystals in comparison with the [001] crystals.

AB - Deformation mechanisms, one-way and two-way shape memory effects were studied in the mode of compression in the [011] single crystal of the Ni55Fe18Ga27 alloy where the detwinning occurred during deformation and in the [001] single crystal where the detwinning was forbidden. It was found that the [001] and [011] crystals deformed by different mechanisms during compression to 5% (reorientation was in [001] crystal, and the reorientation and detwinning were in [011] crystal) and from 15 to 20% (the 14 M → L10 transition was in [001] crystal and plastic deformation of 14 M phase was in [011]). The compression of both single crystals from 5 to 15% occurred due to the same mechanisms: the 10 M ↔ 14 M transformation and the plastic deformation of the 14 M martensite. The 14 M and L10 phases were stable under load, and they transformed to the 10 M martensite on unloading. It was shown that the crystal orientation and detwinning hardly affected the value of the one-way shape memory effect since both crystals were in the 10 M martensite after preliminary deformation. In this case, the transformation of 10 M martensite to the austenite on heating was accompanied by a strain of about 5% and this was the maximum value of the shape memory effect. It was found that the detwinning significantly affected the temperature ranges of strain recovery. In the [011] crystal, the strain recovered in a very narrow interval on heating (1-2°C), whereas in the [001] crystal the shape memory effect was observed in “normal” temperature range (~ 10°C). The detwinning resulted in the formation of a large oriented internal stress during the preliminary deformation that increased the value of the two-way shape memory effect that was observed in [011] crystals in comparison with the [001] crystals.

KW - advanced characterization

KW - deformation mechanisms

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KW - mechanical

KW - shape memory effects

KW - single crystal

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