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A Dislocation-Scale Characterization of the Evolution of Deformation Microstructures around Nanoindentation Imprints in a TiAl Alloy

In this work, plastic deformation was locally introduced at room temperature by nanoindentation on a γ-TiAl-based alloy. Comprehensive analyses of microstructures were performed before and after deformation. In particular, the Burgers vectors, the line directions, and the mechanical twinning systems...

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Autores principales: Guitton, Antoine, Kriaa, Hana, Bouzy, Emmanuel, Guyon, Julien, Maloufi, Nabila
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2018
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5849002/
https://www.ncbi.nlm.nih.gov/pubmed/29461481
http://dx.doi.org/10.3390/ma11020305
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author Guitton, Antoine
Kriaa, Hana
Bouzy, Emmanuel
Guyon, Julien
Maloufi, Nabila
author_facet Guitton, Antoine
Kriaa, Hana
Bouzy, Emmanuel
Guyon, Julien
Maloufi, Nabila
author_sort Guitton, Antoine
collection PubMed
description In this work, plastic deformation was locally introduced at room temperature by nanoindentation on a γ-TiAl-based alloy. Comprehensive analyses of microstructures were performed before and after deformation. In particular, the Burgers vectors, the line directions, and the mechanical twinning systems were studied via accurate electron channeling contrast imaging. Accommodation of the deformation are reported and a scenario is proposed. All features help to explain the poor ductility of the TiAl-based alloys at room temperature.
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spelling pubmed-58490022018-03-14 A Dislocation-Scale Characterization of the Evolution of Deformation Microstructures around Nanoindentation Imprints in a TiAl Alloy Guitton, Antoine Kriaa, Hana Bouzy, Emmanuel Guyon, Julien Maloufi, Nabila Materials (Basel) Article In this work, plastic deformation was locally introduced at room temperature by nanoindentation on a γ-TiAl-based alloy. Comprehensive analyses of microstructures were performed before and after deformation. In particular, the Burgers vectors, the line directions, and the mechanical twinning systems were studied via accurate electron channeling contrast imaging. Accommodation of the deformation are reported and a scenario is proposed. All features help to explain the poor ductility of the TiAl-based alloys at room temperature. MDPI 2018-02-20 /pmc/articles/PMC5849002/ /pubmed/29461481 http://dx.doi.org/10.3390/ma11020305 Text en © 2018 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Guitton, Antoine
Kriaa, Hana
Bouzy, Emmanuel
Guyon, Julien
Maloufi, Nabila
A Dislocation-Scale Characterization of the Evolution of Deformation Microstructures around Nanoindentation Imprints in a TiAl Alloy
title A Dislocation-Scale Characterization of the Evolution of Deformation Microstructures around Nanoindentation Imprints in a TiAl Alloy
title_full A Dislocation-Scale Characterization of the Evolution of Deformation Microstructures around Nanoindentation Imprints in a TiAl Alloy
title_fullStr A Dislocation-Scale Characterization of the Evolution of Deformation Microstructures around Nanoindentation Imprints in a TiAl Alloy
title_full_unstemmed A Dislocation-Scale Characterization of the Evolution of Deformation Microstructures around Nanoindentation Imprints in a TiAl Alloy
title_short A Dislocation-Scale Characterization of the Evolution of Deformation Microstructures around Nanoindentation Imprints in a TiAl Alloy
title_sort dislocation-scale characterization of the evolution of deformation microstructures around nanoindentation imprints in a tial alloy
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5849002/
https://www.ncbi.nlm.nih.gov/pubmed/29461481
http://dx.doi.org/10.3390/ma11020305
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