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

Producción científica: Article › revisión exhaustiva

58 Citas (Scopus)

Resumen

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.

Idioma original	English
Páginas (desde-hasta)	82-94
Número de páginas	13
Publicación	Materials Science and Engineering: A
Volumen	627
DOI	https://doi.org/10.1016/j.msea.2014.12.111
Estado	Published - mar 1 2015

Nota bibliográfica

Publisher Copyright:
© 2015 Elsevier B.V.

Financiación

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 ).

Financiadores	Número del financiador
Technical Discipline Lead Dale Hopkins	NNX11AQ31A
National Aeronautics and Space Administration
Russell Sage Foundation	14-29-00012
Kentucky Space Grant Consortium	516171-10-165
Deutsche Forschungsgemeinschaft	FOR 1766

ASJC Scopus subject areas

General Materials Science
Condensed Matter Physics
Mechanics of Materials
Mechanical Engineering

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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",

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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.

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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.

KW - NiTiHfCu alloys

KW - Phase transformation

KW - Shape memory alloys

KW - Shape memory effect

KW - TWSME

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