Microstructure and transformation related behaviors of a Ni45.3Ti29.7Hf20Cu5 high temperature shape memory alloy

H. E. Karaca; E. Acar; G. S. Ded; S. M. Saghaian; B. Basaran; H. Tobe; M. Kok; H. J. Maier; R. D. Noebe; Y. I. Chumlyakov

doi:10.1016/j.msea.2014.12.111

Microstructure and transformation related behaviors of a Ni_45.3Ti_29.7Hf₂₀Cu₅ high temperature shape memory alloy

H. E. Karaca, E. Acar, G. S. Ded, S. M. Saghaian, B. Basaran, H. Tobe, M. Kok, H. J. Maier, R. D. Noebe, Y. I. Chumlyakov

Mechanical Engineering

Research output: Contribution to journal › Article › peer-review

39 Scopus citations

Abstract

Effects of heat treatment temperature and time on the microstructure and shape memory behaviors (e.g. transformation temperatures, load-biased shape memory effect, superelasticity, two-way shape memory effect, and related properties) were investigated in a Ni_45.3Ti_29.7Hf₂₀Cu₅ (at%) high temperature polycrystalline shape memory alloy. Heat treatments could be used to control the TTs and to a lesser extent recoverable and irrecoverable strains. The Ni_45.3Ti_29.7Hf₂₀Cu₅ alloy was capable of recovering shape memory strains of up to 2% at temperatures above 100°C under high compressive stresses (700MPa) and up to 0.8% TWSME strain was possible after a non-intense stress-cycling training process. However, due to high Clausius-Clapeyron slopes, large temperature hysteresis, and a strong dependence of transformation stress on temperature, fully recoverable superelastic behavior was not observed because plastic deformation occurred concurrently with the stress-induced martensitic transformation.

Original language	English
Pages (from-to)	82-94
Number of pages	13
Journal	Materials Science & Engineering A: Structural Materials: Properties, Microstructure and Processing
Volume	627
DOIs	https://doi.org/10.1016/j.msea.2014.12.111
State	Published - Mar 1 2015

Bibliographical note

Funding Information:
This work was supported in part by the NASA Fundamental Aeronautics Program, and Aeronautical Sciences and Transformational Tools & Technologies Projects (Technical Discipline Lead Dale Hopkins), the NASA EPSCOR program under Grant NNX11AQ31A , the NASA Kentucky Space Grant Consortium 516171-10-165 and RSF Grant 14-29-00012 . HJM acknowledges financial support from Deutsche Forschungsgemeinschaft ( FOR 1766 ).

Publisher Copyright:
© 2015 Elsevier B.V.

Keywords

NiTiHfCu alloys
Phase transformation
Shape memory alloys
Shape memory effect
TWSME

ASJC Scopus subject areas

Materials Science (all)
Condensed Matter Physics
Mechanics of Materials
Mechanical Engineering

Access to Document

10.1016/j.msea.2014.12.111

Cite this

Karaca, H. E., Acar, E., Ded, G. S., Saghaian, S. M., Basaran, B., Tobe, H., Kok, M., Maier, H. J., Noebe, R. D., & Chumlyakov, Y. I. (2015). Microstructure and transformation related behaviors of a Ni_45.3Ti_29.7Hf₂₀Cu₅ high temperature shape memory alloy. Materials Science & Engineering A: Structural Materials: Properties, Microstructure and Processing, 627, 82-94. https://doi.org/10.1016/j.msea.2014.12.111

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title = "Microstructure and transformation related behaviors of a Ni45.3Ti29.7Hf20Cu5 high temperature shape memory alloy",

abstract = "Effects of heat treatment temperature and time on the microstructure and shape memory behaviors (e.g. transformation temperatures, load-biased shape memory effect, superelasticity, two-way shape memory effect, and related properties) were investigated in a Ni45.3Ti29.7Hf20Cu5 (at%) high temperature polycrystalline shape memory alloy. Heat treatments could be used to control the TTs and to a lesser extent recoverable and irrecoverable strains. The Ni45.3Ti29.7Hf20Cu5 alloy was capable of recovering shape memory strains of up to 2% at temperatures above 100°C under high compressive stresses (700MPa) and up to 0.8% TWSME strain was possible after a non-intense stress-cycling training process. However, due to high Clausius-Clapeyron slopes, large temperature hysteresis, and a strong dependence of transformation stress on temperature, fully recoverable superelastic behavior was not observed because plastic deformation occurred concurrently with the stress-induced martensitic transformation.",

keywords = "NiTiHfCu alloys, Phase transformation, Shape memory alloys, Shape memory effect, TWSME",

author = "Karaca, {H. E.} and E. Acar and Ded, {G. S.} and Saghaian, {S. M.} and B. Basaran and H. Tobe and M. Kok and Maier, {H. J.} and Noebe, {R. D.} and Chumlyakov, {Y. I.}",

note = "Funding Information: This work was supported in part by the NASA Fundamental Aeronautics Program, and Aeronautical Sciences and Transformational Tools & Technologies Projects (Technical Discipline Lead Dale Hopkins), the NASA EPSCOR program under Grant NNX11AQ31A , the NASA Kentucky Space Grant Consortium 516171-10-165 and RSF Grant 14-29-00012 . HJM acknowledges financial support from Deutsche Forschungsgemeinschaft ( FOR 1766 ). Publisher Copyright: {\textcopyright} 2015 Elsevier B.V.",

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Karaca, HE, Acar, E, Ded, GS, Saghaian, SM, Basaran, B, Tobe, H, Kok, M, Maier, HJ, Noebe, RD & Chumlyakov, YI 2015, 'Microstructure and transformation related behaviors of a Ni_45.3Ti_29.7Hf₂₀Cu₅ high temperature shape memory alloy', Materials Science & Engineering A: Structural Materials: Properties, Microstructure and Processing, vol. 627, pp. 82-94. https://doi.org/10.1016/j.msea.2014.12.111

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T1 - Microstructure and transformation related behaviors of a Ni45.3Ti29.7Hf20Cu5 high temperature shape memory alloy

AU - Karaca, H. E.

AU - Acar, E.

AU - Ded, G. S.

AU - Saghaian, S. M.

AU - Basaran, B.

AU - Tobe, H.

AU - Kok, M.

AU - Maier, H. J.

AU - Noebe, R. D.

AU - Chumlyakov, Y. I.

N1 - Funding Information: This work was supported in part by the NASA Fundamental Aeronautics Program, and Aeronautical Sciences and Transformational Tools & Technologies Projects (Technical Discipline Lead Dale Hopkins), the NASA EPSCOR program under Grant NNX11AQ31A , the NASA Kentucky Space Grant Consortium 516171-10-165 and RSF Grant 14-29-00012 . HJM acknowledges financial support from Deutsche Forschungsgemeinschaft ( FOR 1766 ). Publisher Copyright: © 2015 Elsevier B.V.

PY - 2015/3/1

Y1 - 2015/3/1

N2 - Effects of heat treatment temperature and time on the microstructure and shape memory behaviors (e.g. transformation temperatures, load-biased shape memory effect, superelasticity, two-way shape memory effect, and related properties) were investigated in a Ni45.3Ti29.7Hf20Cu5 (at%) high temperature polycrystalline shape memory alloy. Heat treatments could be used to control the TTs and to a lesser extent recoverable and irrecoverable strains. The Ni45.3Ti29.7Hf20Cu5 alloy was capable of recovering shape memory strains of up to 2% at temperatures above 100°C under high compressive stresses (700MPa) and up to 0.8% TWSME strain was possible after a non-intense stress-cycling training process. However, due to high Clausius-Clapeyron slopes, large temperature hysteresis, and a strong dependence of transformation stress on temperature, fully recoverable superelastic behavior was not observed because plastic deformation occurred concurrently with the stress-induced martensitic transformation.

AB - Effects of heat treatment temperature and time on the microstructure and shape memory behaviors (e.g. transformation temperatures, load-biased shape memory effect, superelasticity, two-way shape memory effect, and related properties) were investigated in a Ni45.3Ti29.7Hf20Cu5 (at%) high temperature polycrystalline shape memory alloy. Heat treatments could be used to control the TTs and to a lesser extent recoverable and irrecoverable strains. The Ni45.3Ti29.7Hf20Cu5 alloy was capable of recovering shape memory strains of up to 2% at temperatures above 100°C under high compressive stresses (700MPa) and up to 0.8% TWSME strain was possible after a non-intense stress-cycling training process. However, due to high Clausius-Clapeyron slopes, large temperature hysteresis, and a strong dependence of transformation stress on temperature, fully recoverable superelastic behavior was not observed because plastic deformation occurred concurrently with the stress-induced martensitic transformation.

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KW - TWSME

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