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Atomic scale investigation of dynamic precipitation and grain boundary segregation in a 6061 aluminium alloy nanostructured by ECAP. / Sauvage, X.; Murashkin, M. Yu; Valiev, R. Z.

In: Kovove Materialy, Vol. 49, No. 1, 16.05.2011, p. 11-15.

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@article{a02307a2e8e442458ee126e4d4c0faab,
title = "Atomic scale investigation of dynamic precipitation and grain boundary segregation in a 6061 aluminium alloy nanostructured by ECAP",
abstract = "A commercial 6061 aluminium alloy was processed by ECAP and subsequently aged to nucleate nanoscaled precipitates within the ultrafine grain structure. The mechanical behaviour was investigated thanks to tensile tests and the microstructure was characterized at the atomic scale using Atom Probe Tomography. These experimental data clearly reveal that extensive dynamic precipitation and grain boundary segregation occurred during ECAP. These features lead to a significant increase of the strength of the alloy. Further ageing after ECAP processing gives rise to an additional increase of the strength linked to a larger precipitate density. A comparison of the morphology and the composition of precipitates nucleated during ECAP and during the standard T6 ageing treatment shows that the precipitation kinetic is affected by the severe plastic deformation.",
keywords = "Aluminium alloy, ECAP, Grain boundary segregation, Precipitation",
author = "X. Sauvage and Murashkin, {M. Yu} and Valiev, {R. Z.}",
year = "2011",
month = may,
day = "16",
doi = "10.4149/km-2011-1-11",
language = "English",
volume = "49",
pages = "11--15",
journal = "Kovove Materialy",
issn = "0023-432X",
publisher = "Slovenska Akademia Vied",
number = "1",

}

RIS

TY - JOUR

T1 - Atomic scale investigation of dynamic precipitation and grain boundary segregation in a 6061 aluminium alloy nanostructured by ECAP

AU - Sauvage, X.

AU - Murashkin, M. Yu

AU - Valiev, R. Z.

PY - 2011/5/16

Y1 - 2011/5/16

N2 - A commercial 6061 aluminium alloy was processed by ECAP and subsequently aged to nucleate nanoscaled precipitates within the ultrafine grain structure. The mechanical behaviour was investigated thanks to tensile tests and the microstructure was characterized at the atomic scale using Atom Probe Tomography. These experimental data clearly reveal that extensive dynamic precipitation and grain boundary segregation occurred during ECAP. These features lead to a significant increase of the strength of the alloy. Further ageing after ECAP processing gives rise to an additional increase of the strength linked to a larger precipitate density. A comparison of the morphology and the composition of precipitates nucleated during ECAP and during the standard T6 ageing treatment shows that the precipitation kinetic is affected by the severe plastic deformation.

AB - A commercial 6061 aluminium alloy was processed by ECAP and subsequently aged to nucleate nanoscaled precipitates within the ultrafine grain structure. The mechanical behaviour was investigated thanks to tensile tests and the microstructure was characterized at the atomic scale using Atom Probe Tomography. These experimental data clearly reveal that extensive dynamic precipitation and grain boundary segregation occurred during ECAP. These features lead to a significant increase of the strength of the alloy. Further ageing after ECAP processing gives rise to an additional increase of the strength linked to a larger precipitate density. A comparison of the morphology and the composition of precipitates nucleated during ECAP and during the standard T6 ageing treatment shows that the precipitation kinetic is affected by the severe plastic deformation.

KW - Aluminium alloy

KW - ECAP

KW - Grain boundary segregation

KW - Precipitation

UR - http://www.scopus.com/inward/record.url?scp=79955805793&partnerID=8YFLogxK

U2 - 10.4149/km-2011-1-11

DO - 10.4149/km-2011-1-11

M3 - Article

AN - SCOPUS:79955805793

VL - 49

SP - 11

EP - 15

JO - Kovove Materialy

JF - Kovove Materialy

SN - 0023-432X

IS - 1

ER -

ID: 42938334