Functional Properties of Highly Textured Fe–Ni–Co–Al–Ti–B Shape Memory Alloy Wires

Sobrero, C.; Remich, V.; Cassineiro, J.; Giordana, M. F.; Abreu Faria, G.; Liehr, A.; Freudenberger, J.; Niendorf, T.; Krooß, P.

doi:10.1007/s40830-023-00449-7

Shap. Mem. Superelasticity

2023

DOI: 10.1007/s40830-023-00449-7

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Functional Properties of Highly Textured Fe–Ni–Co–Al–Ti–B Shape Memory Alloy Wires

C. Sobrero,

V. Remich,

J. Cassineiro

et al.

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Cited by 3 publications

References 40 publications

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On the Impact of γ´ Precipitates on the Transformation Temperatures in Fe–Ni–Co–Al–Ti–B Shape Memory Alloy Wires

Cassinerio,

Giordana,

Zelaya

et al. 2023

Shap. Mem. Superelasticity

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On the Impact of γ´ Precipitates on the Transformation Temperatures in Fe–Ni–Co–Al–Ti–B Shape Memory Alloy Wires

Cassinerio,

Giordana,

Zelaya

et al. 2023

Shap. Mem. Superelasticity

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On the Effect of Chemical Heterogeneity on the Shape Memory Performance of Fe–Ni–Co–Al–Ti Single Crystals

Remich,

Lauhoff,

Kriegel

et al. 2024

Shap. Mem. Superelasticity

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The present work focuses on the formation of the γ′-phase and its impact on the functional properties of a Fe-28Ni–17Co–11.5Al–2,5Ti (at.-%) shape memory alloy (SMA) under cyclic loading conditions at different testing temperatures. The effect of aging treatments conducted in a wide range of aging temperatures and times was investigated. While specific heat treatments, namely 600 °C for 4 h, result in excellent superelastic properties with a fully reversible material response in single cycle experiments, interestingly, functional degradation is found to be more pronounced under cyclic loading compared to other derivatives of the Fe–Ni–Co–Al-based SMA systems. In addition to mechanical testing, a detailed microstructural analysis was conducted using transmission electron microscopy. The results of the present study clearly reveal that chemical inhomogeneities have to be carefully considered for the characterization of the functional performance of these iron-based SMAs. Chemical heterogeneities are not only identified as the underlying microstructural mechanism for the pronounced cyclic degradation behavior, but are also supposed to have a significant influence on the precipitation kinetics of the γ′-phase.

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Unraveling factors affecting the reversibility of martensitic phase transformation in FeNiCoAlTi shape memory alloys: Insights from HR-EBSD and acoustic emission analysis

Lehnert,

Remich,

Gerstein

et al. 2024

Acta Materialia

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Functional Properties of Highly Textured Fe–Ni–Co–Al–Ti–B Shape Memory Alloy Wires

Cited by 3 publications

References 40 publications

On the Impact of γ´ Precipitates on the Transformation Temperatures in Fe–Ni–Co–Al–Ti–B Shape Memory Alloy Wires

On the Impact of γ´ Precipitates on the Transformation Temperatures in Fe–Ni–Co–Al–Ti–B Shape Memory Alloy Wires

On the Effect of Chemical Heterogeneity on the Shape Memory Performance of Fe–Ni–Co–Al–Ti Single Crystals

Unraveling factors affecting the reversibility of martensitic phase transformation in FeNiCoAlTi shape memory alloys: Insights from HR-EBSD and acoustic emission analysis

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