Unusual Multistage Martensitic Transformation in TiNi Shape Memory Alloy after Thermal Cycling

Research output: Chapter in Book/Report/Conference proceedingConference contributionResearch

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Abstract

Variation in kinetics of martensitic transformation, in an equiatomic TiNi shape memory alloy, during thermal cycles was investigated. Samples annealed at 500 °C for 1 hour were subjected to repeated thermal cycles, through the temperature range of martensitic transformation. Unusual 4-stage martensitic transformation during cooling after 30 thermal cycles was observed. Moreover, a new unusual phenomenon was found in the preliminary thermal cycled TiNi alloy. It was observed that variation in the highest temperature Th of thermal cycles temperature interval resulted in the redistribution of released heat among four calorimetric peaks, observed on cooling. It was found that if the Th temperature did not exceed 240 °C the variation in kinetics was repeatable, and determined only by the value of Th. It was assumed that the defect structure induced on preliminary thermal cycling changes reversibly on cooling and heating.
Original languageEnglish
Title of host publicationUnusual Multistage Martensitic Transformation in TiNi Shape Memory Alloy after Thermal Cycling
Pages372-376
DOIs
StatePublished - 2013

Keywords

  • Martensitic Transformation (MT)
  • Thermal Cycling
  • TiNi

Cite this

Sibirev, A. ; Belyaev, S. ; Resnina, N. / Unusual Multistage Martensitic Transformation in TiNi Shape Memory Alloy after Thermal Cycling. Unusual Multistage Martensitic Transformation in TiNi Shape Memory Alloy after Thermal Cycling. 2013. pp. 372-376
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abstract = "Variation in kinetics of martensitic transformation, in an equiatomic TiNi shape memory alloy, during thermal cycles was investigated. Samples annealed at 500 °C for 1 hour were subjected to repeated thermal cycles, through the temperature range of martensitic transformation. Unusual 4-stage martensitic transformation during cooling after 30 thermal cycles was observed. Moreover, a new unusual phenomenon was found in the preliminary thermal cycled TiNi alloy. It was observed that variation in the highest temperature Th of thermal cycles temperature interval resulted in the redistribution of released heat among four calorimetric peaks, observed on cooling. It was found that if the Th temperature did not exceed 240 °C the variation in kinetics was repeatable, and determined only by the value of Th. It was assumed that the defect structure induced on preliminary thermal cycling changes reversibly on cooling and heating.",
keywords = "Martensitic Transformation (MT), Thermal Cycling, TiNi",
author = "A. Sibirev and S. Belyaev and N. Resnina",
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Unusual Multistage Martensitic Transformation in TiNi Shape Memory Alloy after Thermal Cycling. / Sibirev, A.; Belyaev, S.; Resnina, N.

Unusual Multistage Martensitic Transformation in TiNi Shape Memory Alloy after Thermal Cycling. 2013. p. 372-376.

Research output: Chapter in Book/Report/Conference proceedingConference contributionResearch

TY - GEN

T1 - Unusual Multistage Martensitic Transformation in TiNi Shape Memory Alloy after Thermal Cycling

AU - Sibirev, A.

AU - Belyaev, S.

AU - Resnina, N.

PY - 2013

Y1 - 2013

N2 - Variation in kinetics of martensitic transformation, in an equiatomic TiNi shape memory alloy, during thermal cycles was investigated. Samples annealed at 500 °C for 1 hour were subjected to repeated thermal cycles, through the temperature range of martensitic transformation. Unusual 4-stage martensitic transformation during cooling after 30 thermal cycles was observed. Moreover, a new unusual phenomenon was found in the preliminary thermal cycled TiNi alloy. It was observed that variation in the highest temperature Th of thermal cycles temperature interval resulted in the redistribution of released heat among four calorimetric peaks, observed on cooling. It was found that if the Th temperature did not exceed 240 °C the variation in kinetics was repeatable, and determined only by the value of Th. It was assumed that the defect structure induced on preliminary thermal cycling changes reversibly on cooling and heating.

AB - Variation in kinetics of martensitic transformation, in an equiatomic TiNi shape memory alloy, during thermal cycles was investigated. Samples annealed at 500 °C for 1 hour were subjected to repeated thermal cycles, through the temperature range of martensitic transformation. Unusual 4-stage martensitic transformation during cooling after 30 thermal cycles was observed. Moreover, a new unusual phenomenon was found in the preliminary thermal cycled TiNi alloy. It was observed that variation in the highest temperature Th of thermal cycles temperature interval resulted in the redistribution of released heat among four calorimetric peaks, observed on cooling. It was found that if the Th temperature did not exceed 240 °C the variation in kinetics was repeatable, and determined only by the value of Th. It was assumed that the defect structure induced on preliminary thermal cycling changes reversibly on cooling and heating.

KW - Martensitic Transformation (MT)

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U2 - 10.4028/www.scientific.net/MSF.738-739.372

DO - 10.4028/www.scientific.net/MSF.738-739.372

M3 - Conference contribution

SN - 9783037856109

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BT - Unusual Multistage Martensitic Transformation in TiNi Shape Memory Alloy after Thermal Cycling

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