Entropy change in the B2-B19' martensitic transformation in TiNi alloy

Research output: Contribution to journalArticleResearch

6 Citations (Scopus)

Abstract

Different methods for calculating the entropy change in the thermoelastic martensitic transformation were analysed. A new way of estimating the transformation entropy was proposed based on the simple relationship between the heat released during the forward martensitic transformation and the finish temperature of the forward phase transition. The value of the B2-B19' transformation entropy was calculated for Ti50Ni50 alloy using the different methods. It was shown that the values of entropy change calculated based on the “entropy argument”, “Clausius–Clapeyron relation” and through the calorimetric data (proposed in the present work) were close to each other and gave values which were approximately equal to 0.105 J/(g K). As the method proposed in the present work is simpler than others, it might successfully be used to estimate the transformation entropy and the contributions of the latent heat, elastic and dissipative energies.
Original languageEnglish
Number of pages6
JournalThermochimica Acta
Volume602
DOIs
StatePublished - 2015

Keywords

  • DSC Martensitic transformation Entropy change Thermodynamics TiNi alloy

Cite this

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title = "Entropy change in the B2-B19' martensitic transformation in TiNi alloy",
abstract = "Different methods for calculating the entropy change in the thermoelastic martensitic transformation were analysed. A new way of estimating the transformation entropy was proposed based on the simple relationship between the heat released during the forward martensitic transformation and the finish temperature of the forward phase transition. The value of the B2-B19' transformation entropy was calculated for Ti50Ni50 alloy using the different methods. It was shown that the values of entropy change calculated based on the “entropy argument”, “Clausius–Clapeyron relation” and through the calorimetric data (proposed in the present work) were close to each other and gave values which were approximately equal to 0.105 J/(g K). As the method proposed in the present work is simpler than others, it might successfully be used to estimate the transformation entropy and the contributions of the latent heat, elastic and dissipative energies.",
keywords = "DSC Martensitic transformation Entropy change Thermodynamics TiNi alloy",
author = "Natalia Resnina and Sergey Belyaev",
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doi = "10.1016/j.tca.2015.01.004",
language = "English",
volume = "602",
journal = "Thermochimica Acta",
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}

Entropy change in the B2-B19' martensitic transformation in TiNi alloy. / Resnina, Natalia; Belyaev, Sergey.

In: Thermochimica Acta, Vol. 602, 2015.

Research output: Contribution to journalArticleResearch

TY - JOUR

T1 - Entropy change in the B2-B19' martensitic transformation in TiNi alloy

AU - Resnina, Natalia

AU - Belyaev, Sergey

PY - 2015

Y1 - 2015

N2 - Different methods for calculating the entropy change in the thermoelastic martensitic transformation were analysed. A new way of estimating the transformation entropy was proposed based on the simple relationship between the heat released during the forward martensitic transformation and the finish temperature of the forward phase transition. The value of the B2-B19' transformation entropy was calculated for Ti50Ni50 alloy using the different methods. It was shown that the values of entropy change calculated based on the “entropy argument”, “Clausius–Clapeyron relation” and through the calorimetric data (proposed in the present work) were close to each other and gave values which were approximately equal to 0.105 J/(g K). As the method proposed in the present work is simpler than others, it might successfully be used to estimate the transformation entropy and the contributions of the latent heat, elastic and dissipative energies.

AB - Different methods for calculating the entropy change in the thermoelastic martensitic transformation were analysed. A new way of estimating the transformation entropy was proposed based on the simple relationship between the heat released during the forward martensitic transformation and the finish temperature of the forward phase transition. The value of the B2-B19' transformation entropy was calculated for Ti50Ni50 alloy using the different methods. It was shown that the values of entropy change calculated based on the “entropy argument”, “Clausius–Clapeyron relation” and through the calorimetric data (proposed in the present work) were close to each other and gave values which were approximately equal to 0.105 J/(g K). As the method proposed in the present work is simpler than others, it might successfully be used to estimate the transformation entropy and the contributions of the latent heat, elastic and dissipative energies.

KW - DSC Martensitic transformation Entropy change Thermodynamics TiNi alloy

U2 - 10.1016/j.tca.2015.01.004

DO - 10.1016/j.tca.2015.01.004

M3 - Article

VL - 602

JO - Thermochimica Acta

JF - Thermochimica Acta

SN - 0040-6031

ER -