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Nanoscale twinning in Fe–Mn–Al–Ni martensite: a backscatter Kikuchi diffraction study

Iron-based Fe–Mn–Al–Ni shape-memory alloys are of rather low materials cost and show remarkable pseudoelastic properties. To further understand the martensitic transformation giving rise to the pseudoelastic properties, different Fe–Mn–Al–Ni alloys have been heat treated at 1473 K and quenched in ic...

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Autores principales: Fischer, Peter D. B., Martin, Stefan, Walnsch, Alexander, Thümmler, Martin, Kriegel, Mario J., Leineweber, Andreas
Formato: Online Artículo Texto
Lenguaje:English
Publicado: International Union of Crystallography 2021
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7941309/
https://www.ncbi.nlm.nih.gov/pubmed/33833640
http://dx.doi.org/10.1107/S1600576720013631
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author Fischer, Peter D. B.
Martin, Stefan
Walnsch, Alexander
Thümmler, Martin
Kriegel, Mario J.
Leineweber, Andreas
author_facet Fischer, Peter D. B.
Martin, Stefan
Walnsch, Alexander
Thümmler, Martin
Kriegel, Mario J.
Leineweber, Andreas
author_sort Fischer, Peter D. B.
collection PubMed
description Iron-based Fe–Mn–Al–Ni shape-memory alloys are of rather low materials cost and show remarkable pseudoelastic properties. To further understand the martensitic transformation giving rise to the pseudoelastic properties, different Fe–Mn–Al–Ni alloys have been heat treated at 1473 K and quenched in ice water. The martensite, which is formed from a body-centred cubic austenite, is commonly described as face-centered cubic (f.c.c.), even though there are also more complex, polytypical descriptions of martensite. The presently studied backscatter Kikuchi diffraction (BKD) patterns have been evaluated, showing a structure more complex than simple f.c.c. This structure can be described by nanoscale twins, diffracting simultaneously in the exciting volume. The twinned structure shows a tetragonal distortion, not uncommon for martensite in spite of the lack of interstitial elements. These features are evaluated by comparing the measured BKD patterns with dynamically simulated ones.
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spelling pubmed-79413092021-04-07 Nanoscale twinning in Fe–Mn–Al–Ni martensite: a backscatter Kikuchi diffraction study Fischer, Peter D. B. Martin, Stefan Walnsch, Alexander Thümmler, Martin Kriegel, Mario J. Leineweber, Andreas J Appl Crystallogr Research Papers Iron-based Fe–Mn–Al–Ni shape-memory alloys are of rather low materials cost and show remarkable pseudoelastic properties. To further understand the martensitic transformation giving rise to the pseudoelastic properties, different Fe–Mn–Al–Ni alloys have been heat treated at 1473 K and quenched in ice water. The martensite, which is formed from a body-centred cubic austenite, is commonly described as face-centered cubic (f.c.c.), even though there are also more complex, polytypical descriptions of martensite. The presently studied backscatter Kikuchi diffraction (BKD) patterns have been evaluated, showing a structure more complex than simple f.c.c. This structure can be described by nanoscale twins, diffracting simultaneously in the exciting volume. The twinned structure shows a tetragonal distortion, not uncommon for martensite in spite of the lack of interstitial elements. These features are evaluated by comparing the measured BKD patterns with dynamically simulated ones. International Union of Crystallography 2021-02-01 /pmc/articles/PMC7941309/ /pubmed/33833640 http://dx.doi.org/10.1107/S1600576720013631 Text en © Peter D. B. Fischer et al. 2021 http://creativecommons.org/licenses/by/4.0/ This is an open-access article distributed under the terms of the Creative Commons Attribution (CC-BY) Licence, which permits unrestricted use, distribution, and reproduction in any medium, provided the original authors and source are cited.http://creativecommons.org/licenses/by/4.0/
spellingShingle Research Papers
Fischer, Peter D. B.
Martin, Stefan
Walnsch, Alexander
Thümmler, Martin
Kriegel, Mario J.
Leineweber, Andreas
Nanoscale twinning in Fe–Mn–Al–Ni martensite: a backscatter Kikuchi diffraction study
title Nanoscale twinning in Fe–Mn–Al–Ni martensite: a backscatter Kikuchi diffraction study
title_full Nanoscale twinning in Fe–Mn–Al–Ni martensite: a backscatter Kikuchi diffraction study
title_fullStr Nanoscale twinning in Fe–Mn–Al–Ni martensite: a backscatter Kikuchi diffraction study
title_full_unstemmed Nanoscale twinning in Fe–Mn–Al–Ni martensite: a backscatter Kikuchi diffraction study
title_short Nanoscale twinning in Fe–Mn–Al–Ni martensite: a backscatter Kikuchi diffraction study
title_sort nanoscale twinning in fe–mn–al–ni martensite: a backscatter kikuchi diffraction study
topic Research Papers
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7941309/
https://www.ncbi.nlm.nih.gov/pubmed/33833640
http://dx.doi.org/10.1107/S1600576720013631
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