Stress-assisted atomic diffusion in metastable austenite D03 phase of Cu-Al-Be shape memory alloys

Cu-Al-based shape memory alloys are firm candidates to be used up to 473 K. The main limiting aspect is the activation of diffusion processes in the metastable austenite phase, which drive the alloy decomposition. In the present work the study of short-distance diffusion processes has been approache...

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Authors: López Ferreño, Iñaki, Breczewski Filberek, Tomasz, López, Gabriel Alejandro, Nó Sánchez, María Luisa, San Juan Núñez, José María
Format: article
Publication Date:2016
Country:España
Institution:Universidad del País Vasco
Repository:Addi. Archivo Digital para la Docencia y la Investigación
OAI Identifier:oai:addi.ehu.eus:10810/25407
Online Access:http://hdl.handle.net/10810/25407
Access Level:Open access
Keyword:shape memory alloys (SMA)
Cu-Al-Be
stress-assisted diffusion
internal friction
relaxation
single-crystals
superelasticity
transformation
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spelling Stress-assisted atomic diffusion in metastable austenite D03 phase of Cu-Al-Be shape memory alloysLópez Ferreño, IñakiBreczewski Filberek, TomaszLópez, Gabriel AlejandroNó Sánchez, María LuisaSan Juan Núñez, José Maríashape memory alloys (SMA)Cu-Al-Bestress-assisted diffusioninternal frictionrelaxationsingle-crystalssuperelasticitytransformationCu-Al-based shape memory alloys are firm candidates to be used up to 473 K. The main limiting aspect is the activation of diffusion processes in the metastable austenite phase, which drive the alloy decomposition. In the present work the study of short-distance diffusion processes has been approached by internal friction. A relaxation peak has been found in the metastable beta (D0(3)) phase of a Cu-Al-Be shape memory alloy, around 500 K (at 1 Hz), with an activation energy of E-a = 138 +/- 0.05 eV. An atomic mechanism of elastic dipoles Antisite-Vacancy reorientation, involving stress-assisted short distance Cu-atoms diffusion, has been proposed. (C) 2016 Elsevier B.V.This work was supported by the European H2020 Project REACT, Grant No 640241, and the Spanish Ministry MINECO projects, MAT2012-36421 and CONSOLIDER-INGENIO 2010 CSD2009-00013, as well as by the Consolidated Research Group IT-1090-16 from the Education Department and the project ELKARTEK ACTIMAT, KK-2015/0000094, from the Industry Department of the Basque Government.Pergamon-ElsevierEuropean Commission201820182016info:eu-repo/semantics/articleapplication/pdfhttp://hdl.handle.net/10810/25407reponame:Addi. Archivo Digital para la Docencia y la Investigacióninstname:Universidad del País VascoInglésinfo:eu-repo/grantAgreement/EC/H2020/640241info:eu-repo/grantAgreement/MINECO/MAT2012-36421/https://www.sciencedirect.com/science/article/pii/S1359646216302883?via%3Dihubinfo:eu-repo/semantics/openAccesshttp://creativecommons.org/licenses/by-nc-nd/3.0/es/© 2016 Elsevier B.V. This is an open access article under the CC BY-NC-ND license (http://creativecommons/licenses/by-nc-nd/4.0/).Atribución-NoComercial-SinDerivadas 3.0 Españaoai:addi.ehu.eus:10810/254072026-06-18T09:23:17Z
dc.title.none.fl_str_mv Stress-assisted atomic diffusion in metastable austenite D03 phase of Cu-Al-Be shape memory alloys
title Stress-assisted atomic diffusion in metastable austenite D03 phase of Cu-Al-Be shape memory alloys
spellingShingle Stress-assisted atomic diffusion in metastable austenite D03 phase of Cu-Al-Be shape memory alloys
López Ferreño, Iñaki
shape memory alloys (SMA)
Cu-Al-Be
stress-assisted diffusion
internal friction
relaxation
single-crystals
superelasticity
transformation
title_short Stress-assisted atomic diffusion in metastable austenite D03 phase of Cu-Al-Be shape memory alloys
title_full Stress-assisted atomic diffusion in metastable austenite D03 phase of Cu-Al-Be shape memory alloys
title_fullStr Stress-assisted atomic diffusion in metastable austenite D03 phase of Cu-Al-Be shape memory alloys
title_full_unstemmed Stress-assisted atomic diffusion in metastable austenite D03 phase of Cu-Al-Be shape memory alloys
title_sort Stress-assisted atomic diffusion in metastable austenite D03 phase of Cu-Al-Be shape memory alloys
dc.creator.none.fl_str_mv López Ferreño, Iñaki
Breczewski Filberek, Tomasz
López, Gabriel Alejandro
Nó Sánchez, María Luisa
San Juan Núñez, José María
author López Ferreño, Iñaki
author_facet López Ferreño, Iñaki
Breczewski Filberek, Tomasz
López, Gabriel Alejandro
Nó Sánchez, María Luisa
San Juan Núñez, José María
author_role author
author2 Breczewski Filberek, Tomasz
López, Gabriel Alejandro
Nó Sánchez, María Luisa
San Juan Núñez, José María
author2_role author
author
author
author
dc.contributor.none.fl_str_mv European Commission
dc.subject.none.fl_str_mv shape memory alloys (SMA)
Cu-Al-Be
stress-assisted diffusion
internal friction
relaxation
single-crystals
superelasticity
transformation
topic shape memory alloys (SMA)
Cu-Al-Be
stress-assisted diffusion
internal friction
relaxation
single-crystals
superelasticity
transformation
description Cu-Al-based shape memory alloys are firm candidates to be used up to 473 K. The main limiting aspect is the activation of diffusion processes in the metastable austenite phase, which drive the alloy decomposition. In the present work the study of short-distance diffusion processes has been approached by internal friction. A relaxation peak has been found in the metastable beta (D0(3)) phase of a Cu-Al-Be shape memory alloy, around 500 K (at 1 Hz), with an activation energy of E-a = 138 +/- 0.05 eV. An atomic mechanism of elastic dipoles Antisite-Vacancy reorientation, involving stress-assisted short distance Cu-atoms diffusion, has been proposed. (C) 2016 Elsevier B.V.
publishDate 2016
dc.date.none.fl_str_mv 2016
2018
2018
dc.type.none.fl_str_mv info:eu-repo/semantics/article
format article
dc.identifier.none.fl_str_mv http://hdl.handle.net/10810/25407
url http://hdl.handle.net/10810/25407
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv info:eu-repo/grantAgreement/EC/H2020/640241
info:eu-repo/grantAgreement/MINECO/MAT2012-36421/
https://www.sciencedirect.com/science/article/pii/S1359646216302883?via%3Dihub
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
http://creativecommons.org/licenses/by-nc-nd/3.0/es/
Atribución-NoComercial-SinDerivadas 3.0 España
eu_rights_str_mv openAccess
rights_invalid_str_mv http://creativecommons.org/licenses/by-nc-nd/3.0/es/
Atribución-NoComercial-SinDerivadas 3.0 España
dc.format.none.fl_str_mv application/pdf
dc.publisher.none.fl_str_mv Pergamon-Elsevier
publisher.none.fl_str_mv Pergamon-Elsevier
dc.source.none.fl_str_mv reponame:Addi. Archivo Digital para la Docencia y la Investigación
instname:Universidad del País Vasco
instname_str Universidad del País Vasco
reponame_str Addi. Archivo Digital para la Docencia y la Investigación
collection Addi. Archivo Digital para la Docencia y la Investigación
repository.name.fl_str_mv
repository.mail.fl_str_mv
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