[Kovove materialy - Metallic materials]
    Tue - March 20, 2018 - 22:16 No. of hits : 912298 ISSN 1338-4252 (online) ISSN 0023-432X (printed)
© Institute of Materials and Machine Mechanics, Slovak Academy of Sciences, Bratislava, Slovak Republic

VOLUME 49 (2011), Issue 1

Atomic scale investigation of dynamic precipitation and grain boundary segregation in a 6061 aluminium alloy nanostructured by ECAP
vol. 49 (2011), no. 1, pp. 11 - 15

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 aging 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 aging treatment shows that the precipitation kinetic is affected by the severe plastic deformation.

Key words
aluminium alloy, precipitation, grain boundary segregation, ECAP

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Full title of this journal is bilingual: Kovové materiály - Metallic Materials.
The official abbreviation in accordance with JCR ISI is Kovove Mater.

Article abstracts updated: 2018-02-20 07:23      
Articles in press revised: 2017-11-14 12:19     
Full text pdf uploaded: 2018-02-20 07:21    
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