Dislocation driven nanosample plasticity: new insights from quantitative in-situ TEM tensile testing

Abstract Intrinsic dislocation mechanisms in the vicinity of free surfaces of an almost FIB damage-free single crystal Ni sample have been quantitatively investigated owing to a novel sample preparation method combining twin-jet electro-polishing, in-situ TEM heating and FIB. The results reveal that...

Descripción completa

Guardado en:

Detalles Bibliográficos
Autores principales:	Vahid Samaee, Riccardo Gatti, Benoit Devincre, Thomas Pardoen, Dominique Schryvers, Hosni Idrissi
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2018
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/a531c9b298d6471c802bfe68c46420dc
Etiquetas:	Agregar Etiqueta Sin Etiquetas, Sea el primero en etiquetar este registro!

id	oai:doaj.org-article:a531c9b298d6471c802bfe68c46420dc
record_format	dspace
spelling	oai:doaj.org-article:a531c9b298d6471c802bfe68c46420dc2021-12-02T15:08:36ZDislocation driven nanosample plasticity: new insights from quantitative in-situ TEM tensile testing10.1038/s41598-018-30639-82045-2322https://doaj.org/article/a531c9b298d6471c802bfe68c46420dc2018-08-01T00:00:00Zhttps://doi.org/10.1038/s41598-018-30639-8https://doaj.org/toc/2045-2322Abstract Intrinsic dislocation mechanisms in the vicinity of free surfaces of an almost FIB damage-free single crystal Ni sample have been quantitatively investigated owing to a novel sample preparation method combining twin-jet electro-polishing, in-situ TEM heating and FIB. The results reveal that the small-scale plasticity is mainly controlled by the conversion of few tangled dislocations, still present after heating, into stable single arm sources (SASs) as well as by the successive operation of these sources. Strain hardening resulting from the operation of an individual SAS is reported and attributed to the decrease of the length of the source. Moreover, the impact of the shortening of the dislocation source on the intermittent plastic flow, characteristic of SASs, is discussed. These findings provide essential information for the understanding of the regime of ‘dislocation source’ controlled plasticity and the related mechanical size effect.Vahid SamaeeRiccardo GattiBenoit DevincreThomas PardoenDominique SchryversHosni IdrissiNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 8, Iss 1, Pp 1-11 (2018)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Vahid Samaee Riccardo Gatti Benoit Devincre Thomas Pardoen Dominique Schryvers Hosni Idrissi Dislocation driven nanosample plasticity: new insights from quantitative in-situ TEM tensile testing
description	Abstract Intrinsic dislocation mechanisms in the vicinity of free surfaces of an almost FIB damage-free single crystal Ni sample have been quantitatively investigated owing to a novel sample preparation method combining twin-jet electro-polishing, in-situ TEM heating and FIB. The results reveal that the small-scale plasticity is mainly controlled by the conversion of few tangled dislocations, still present after heating, into stable single arm sources (SASs) as well as by the successive operation of these sources. Strain hardening resulting from the operation of an individual SAS is reported and attributed to the decrease of the length of the source. Moreover, the impact of the shortening of the dislocation source on the intermittent plastic flow, characteristic of SASs, is discussed. These findings provide essential information for the understanding of the regime of ‘dislocation source’ controlled plasticity and the related mechanical size effect.
format	article
author	Vahid Samaee Riccardo Gatti Benoit Devincre Thomas Pardoen Dominique Schryvers Hosni Idrissi
author_facet	Vahid Samaee Riccardo Gatti Benoit Devincre Thomas Pardoen Dominique Schryvers Hosni Idrissi
author_sort	Vahid Samaee
title	Dislocation driven nanosample plasticity: new insights from quantitative in-situ TEM tensile testing
title_short	Dislocation driven nanosample plasticity: new insights from quantitative in-situ TEM tensile testing
title_full	Dislocation driven nanosample plasticity: new insights from quantitative in-situ TEM tensile testing
title_fullStr	Dislocation driven nanosample plasticity: new insights from quantitative in-situ TEM tensile testing
title_full_unstemmed	Dislocation driven nanosample plasticity: new insights from quantitative in-situ TEM tensile testing
title_sort	dislocation driven nanosample plasticity: new insights from quantitative in-situ tem tensile testing
publisher	Nature Portfolio
publishDate	2018
url	https://doaj.org/article/a531c9b298d6471c802bfe68c46420dc
work_keys_str_mv	AT vahidsamaee dislocationdrivennanosampleplasticitynewinsightsfromquantitativeinsitutemtensiletesting AT riccardogatti dislocationdrivennanosampleplasticitynewinsightsfromquantitativeinsitutemtensiletesting AT benoitdevincre dislocationdrivennanosampleplasticitynewinsightsfromquantitativeinsitutemtensiletesting AT thomaspardoen dislocationdrivennanosampleplasticitynewinsightsfromquantitativeinsitutemtensiletesting AT dominiqueschryvers dislocationdrivennanosampleplasticitynewinsightsfromquantitativeinsitutemtensiletesting AT hosniidrissi dislocationdrivennanosampleplasticitynewinsightsfromquantitativeinsitutemtensiletesting
_version_	1718388079092301824

Dislocation driven nanosample plasticity: new insights from quantitative in-situ TEM tensile testing

Ejemplares similares