Research output: Contribution to journal › Article › peer-review
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.Research output: Contribution to journal › Article › peer-review
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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