Date
2021-07-26Metadata
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Aufsatz
Deutsche Forschungsgemeinschaft (project number 400008732)
Artikel (Publikationen im Open Access gefördert durch die UB)
Effect of Crystallographic Orientation and Grain Boundaries on Martensitic Transformation and Superelastic Response of Oligocrystalline Fe–Mn–Al–Ni Shape Memory Alloys
Abstract
In situ tensile tests employing digital image correlation were conducted to study the martensitic transformation of oligocrystalline Fe–Mn–Al–Ni shape memory alloys in depth. The influence of different grain orientations, i.e., near-〈001〉 and near-〈101〉, as well as the influence of different grain boundary misorientations are in focus of the present work. The results reveal that the reversibility of the martensite strongly depends on the type of martensitic evolving, i.e., twinned or detwinned. Furthermore, it is shown that grain boundaries lead to stress concentrations and, thus, to formation of unfavored martensite variants. Moreover, some martensite plates seem to penetrate the grain boundaries resulting in a high degree of irreversibility in this area. However, after a stable microstructural configuration is established in direct vicinity of the grain boundary, the transformation begins inside the neighboring grains eventually leading to a sequential transformation of all grains involved.
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Gefördert im Rahmen des Projekts DEALDeutsche Forschungsgemeinschaft (project number 400008732)
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Publikationen (Fachgebiet Metallische Werkstoffe)Artikel (Publikationen im Open Access gefördert durch die UB)
Citation
@article{doi:10.17170/kobra-202110084857,
author={Bauer, André and Vollmer, Malte and Niendorf, Thomas},
title={Effect of Crystallographic Orientation and Grain Boundaries on Martensitic Transformation and Superelastic Response of Oligocrystalline Fe–Mn–Al–Ni Shape Memory Alloys},
journal={Shape Memory and Superelasticity},
year={2021}
}
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2050 ##0##http://hdl.handle.net/123456789/13369
3000 Bauer, André
3010 Vollmer, Malte
3010 Niendorf, Thomas
4000 Effect of Crystallographic Orientation and Grain Boundaries on Martensitic Transformation and Superelastic Response of Oligocrystalline Fe–Mn–Al–Ni Shape Memory Alloys / Bauer, André
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4170
5550 {{Memory-Legierung}}
5550 {{Martensitumwandlung}}
5550 {{Kristallstruktur}}
5550 {{Kristallorientierung}}
5550 {{Bildkorrelation}}
5550 {{Korngrenze}}
7136 ##0##http://hdl.handle.net/123456789/13369
<resource xsi:schemaLocation="http://datacite.org/schema/kernel-2.2 http://schema.datacite.org/meta/kernel-2.2/metadata.xsd"> 2021-11-08T14:38:01Z 2021-11-08T14:38:01Z 2021-07-26 doi:10.17170/kobra-202110084857 http://hdl.handle.net/123456789/13369 Gefördert im Rahmen des Projekts DEAL Deutsche Forschungsgemeinschaft (project number 400008732) eng Namensnennung 4.0 International http://creativecommons.org/licenses/by/4.0/ FeMnAlNi shape memory alloys oligocrystalline structure martensitic phase transformation crystallographic orientation digital image correlation grain boundaries 620 660 Effect of Crystallographic Orientation and Grain Boundaries on Martensitic Transformation and Superelastic Response of Oligocrystalline Fe–Mn–Al–Ni Shape Memory Alloys Aufsatz In situ tensile tests employing digital image correlation were conducted to study the martensitic transformation of oligocrystalline Fe–Mn–Al–Ni shape memory alloys in depth. The influence of different grain orientations, i.e., near-〈001〉 and near-〈101〉, as well as the influence of different grain boundary misorientations are in focus of the present work. The results reveal that the reversibility of the martensite strongly depends on the type of martensitic evolving, i.e., twinned or detwinned. Furthermore, it is shown that grain boundaries lead to stress concentrations and, thus, to formation of unfavored martensite variants. Moreover, some martensite plates seem to penetrate the grain boundaries resulting in a high degree of irreversibility in this area. However, after a stable microstructural configuration is established in direct vicinity of the grain boundary, the transformation begins inside the neighboring grains eventually leading to a sequential transformation of all grains involved. open access Bauer, André Vollmer, Malte Niendorf, Thomas doi:10.1007/s40830-021-00340-3 project number 400008732 Memory-Legierung Martensitumwandlung Kristallstruktur Kristallorientierung Bildkorrelation Korngrenze publishedVersion eissn:2199-3858 Issue 3 Shape Memory and Superelasticity 373-382 Volume 7 false </resource>
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