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Erschienen in: Shape Memory and Superelasticity 2/2020

22.05.2020 | Special Issue: A Tribute to Prof. Dr. Gunther Eggeler, Invited Paper

The Effect of Increasing Chemical Complexity on the Mechanical and Functional Behavior of NiTi-Related Shape Memory Alloys

verfasst von: Christian Hinte, Khemais Barienti, Jan Steinbrücker, Jana-Mercedes Hartmann, Gregory Gerstein, Sebastian Herbst, David Piorunek, Jan Frenzel, Andrea Fantin, Hans Jürgen Maier

Erschienen in: Shape Memory and Superelasticity | Ausgabe 2/2020

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Abstract

The introduction of high-entropy alloys (HEA) into the field of shape memory alloys offers enormous potential for improving their functional properties. It is shown how a successive increase in chemical complexity results in strictly monotonically enlarged and increasingly distorted lattices. With increasing the number of elements added to the alloy, the effect of solid solution strengthening appears to be curtailed and first insights into the contribution of additional mechanisms based on lattice distortions are possible. The alloys developed in this study, reaching from ternary NiTiHf to senary TiZrHfCoNiCu, show a great potential to exploit interatomic interactions regarding improvement of functional fatigue. Despite the absence of stress plateaus related to detwinning, recovery effects at loads above 1000 MPa and significant strain recoveries are shown.
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Literatur
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Metadaten
Titel
The Effect of Increasing Chemical Complexity on the Mechanical and Functional Behavior of NiTi-Related Shape Memory Alloys
verfasst von
Christian Hinte
Khemais Barienti
Jan Steinbrücker
Jana-Mercedes Hartmann
Gregory Gerstein
Sebastian Herbst
David Piorunek
Jan Frenzel
Andrea Fantin
Hans Jürgen Maier
Publikationsdatum
22.05.2020
Verlag
Springer US
Erschienen in
Shape Memory and Superelasticity / Ausgabe 2/2020
Print ISSN: 2199-384X
Elektronische ISSN: 2199-3858
DOI
https://doi.org/10.1007/s40830-020-00284-0

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