Cargando…

Plastic accommodation at homophase interfaces between nanotwinned and recrystallized grains in an austenitic duplex-microstructured steel

The plastic co-deformation behavior at the homophase interfaces between the hard nanotwinned grain inclusions and the soft recrystallized matrix grains in a duplex-microstructured AISI 316L austenitic stainless steel is examined through the analysis of long-range orientation gradients within the mat...

Descripción completa

Detalles Bibliográficos
Autores principales: Gutierrez-Urrutia, Iván, Archie, Fady, Raabe, Dierk, Yan, Feng-Kai, Tao, Nai-Rong, Lu, Ke
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Taylor & Francis 2016
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5101895/
https://www.ncbi.nlm.nih.gov/pubmed/27877855
http://dx.doi.org/10.1080/14686996.2016.1140302
_version_ 1782466372841766912
author Gutierrez-Urrutia, Iván
Archie, Fady
Raabe, Dierk
Yan, Feng-Kai
Tao, Nai-Rong
Lu, Ke
author_facet Gutierrez-Urrutia, Iván
Archie, Fady
Raabe, Dierk
Yan, Feng-Kai
Tao, Nai-Rong
Lu, Ke
author_sort Gutierrez-Urrutia, Iván
collection PubMed
description The plastic co-deformation behavior at the homophase interfaces between the hard nanotwinned grain inclusions and the soft recrystallized matrix grains in a duplex-microstructured AISI 316L austenitic stainless steel is examined through the analysis of long-range orientation gradients within the matrix grains by electron backscatter diffraction and transmission electron microcopy. Our analysis reveals that the mechanical accommodation of homophase interfaces until a macroscopic strain of 22% is realized within a small area of soft grains (about four grains) adjacent to the homophase interface. The activation of deformation twinning in the first two grain layers results in the occurrence of a ‘hump’ in the orientation gradient profile. We ascribe this effect to the role of deformation twinning on the generation of geometrically necessary dislocations. The smooth profile of the orientation gradient amplitude within the first 10 grain layers indicates a gradual plastic accommodation of the homophase interfaces upon straining. As a consequence, damage nucleation at such interfaces is impeded, resulting in an enhanced ductility of the single phase duplex-microstructured steel.
format Online
Article
Text
id pubmed-5101895
institution National Center for Biotechnology Information
language English
publishDate 2016
publisher Taylor & Francis
record_format MEDLINE/PubMed
spelling pubmed-51018952016-11-22 Plastic accommodation at homophase interfaces between nanotwinned and recrystallized grains in an austenitic duplex-microstructured steel Gutierrez-Urrutia, Iván Archie, Fady Raabe, Dierk Yan, Feng-Kai Tao, Nai-Rong Lu, Ke Sci Technol Adv Mater Engineering and Structural Materials The plastic co-deformation behavior at the homophase interfaces between the hard nanotwinned grain inclusions and the soft recrystallized matrix grains in a duplex-microstructured AISI 316L austenitic stainless steel is examined through the analysis of long-range orientation gradients within the matrix grains by electron backscatter diffraction and transmission electron microcopy. Our analysis reveals that the mechanical accommodation of homophase interfaces until a macroscopic strain of 22% is realized within a small area of soft grains (about four grains) adjacent to the homophase interface. The activation of deformation twinning in the first two grain layers results in the occurrence of a ‘hump’ in the orientation gradient profile. We ascribe this effect to the role of deformation twinning on the generation of geometrically necessary dislocations. The smooth profile of the orientation gradient amplitude within the first 10 grain layers indicates a gradual plastic accommodation of the homophase interfaces upon straining. As a consequence, damage nucleation at such interfaces is impeded, resulting in an enhanced ductility of the single phase duplex-microstructured steel. Taylor & Francis 2016-03-01 /pmc/articles/PMC5101895/ /pubmed/27877855 http://dx.doi.org/10.1080/14686996.2016.1140302 Text en © 2016 The Author(s). Published by National Institute for Materials Science in partnership with Taylor & Francis http://creativecommons.org/licenses/by/4.0/ This is an Open Access article distributed under the terms of the Creative Commons Attribution License CC-BYhttp://creativecommons.org/licenses/by/4.0/which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
spellingShingle Engineering and Structural Materials
Gutierrez-Urrutia, Iván
Archie, Fady
Raabe, Dierk
Yan, Feng-Kai
Tao, Nai-Rong
Lu, Ke
Plastic accommodation at homophase interfaces between nanotwinned and recrystallized grains in an austenitic duplex-microstructured steel
title Plastic accommodation at homophase interfaces between nanotwinned and recrystallized grains in an austenitic duplex-microstructured steel
title_full Plastic accommodation at homophase interfaces between nanotwinned and recrystallized grains in an austenitic duplex-microstructured steel
title_fullStr Plastic accommodation at homophase interfaces between nanotwinned and recrystallized grains in an austenitic duplex-microstructured steel
title_full_unstemmed Plastic accommodation at homophase interfaces between nanotwinned and recrystallized grains in an austenitic duplex-microstructured steel
title_short Plastic accommodation at homophase interfaces between nanotwinned and recrystallized grains in an austenitic duplex-microstructured steel
title_sort plastic accommodation at homophase interfaces between nanotwinned and recrystallized grains in an austenitic duplex-microstructured steel
topic Engineering and Structural Materials
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5101895/
https://www.ncbi.nlm.nih.gov/pubmed/27877855
http://dx.doi.org/10.1080/14686996.2016.1140302
work_keys_str_mv AT gutierrezurrutiaivan plasticaccommodationathomophaseinterfacesbetweennanotwinnedandrecrystallizedgrainsinanausteniticduplexmicrostructuredsteel
AT archiefady plasticaccommodationathomophaseinterfacesbetweennanotwinnedandrecrystallizedgrainsinanausteniticduplexmicrostructuredsteel
AT raabedierk plasticaccommodationathomophaseinterfacesbetweennanotwinnedandrecrystallizedgrainsinanausteniticduplexmicrostructuredsteel
AT yanfengkai plasticaccommodationathomophaseinterfacesbetweennanotwinnedandrecrystallizedgrainsinanausteniticduplexmicrostructuredsteel
AT taonairong plasticaccommodationathomophaseinterfacesbetweennanotwinnedandrecrystallizedgrainsinanausteniticduplexmicrostructuredsteel
AT luke plasticaccommodationathomophaseinterfacesbetweennanotwinnedandrecrystallizedgrainsinanausteniticduplexmicrostructuredsteel