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HomeMaterials Science ForumMaterials Science Forum Vols. 503-504Microstructure Evolution and Aging Kinetics of...

Microstructure Evolution and Aging Kinetics of Al-Mg-Si and Al-Mg-Si-Sc Alloys Processed by ECAP

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Abstract:

A study was carried out on a ECAP processed Sc-containing Al-Mg-Si alloy and on a reference 6082 alloy to investigated grain structure evolution during severe plastic deformation and post-ECAP aging behaviour. The results showed that the mechanism of ultrafine structure development was substantially unchanged with respect to a reference Sc-free alloy. Also the aging sequence and precipitation kinetics of the two alloys revealed to be comparable. The ECAP processed samples of the 6082 reference alloy showed a clear recrystallization peak at temperatures in the range 315-360°C, depending on the amount of strain experienced, whereas the Sc-containing alloy retained its ultrafine structure up to temperatures well exceeding 450°C, under the conditions reproduced in a DSC temperature scan.

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Periodical:

Materials Science Forum (Volumes 503-504)

Pages:

493-498

DOI:

https://doi.org/10.4028/www.scientific.net/MSF.503-504.493

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Online since:

January 2006

Authors:

Giuliano Angella, Paola Bassani, Ausonio Tuissi, D. Ripamonti, Maurizio Vedani

Keywords:

Aging Kinetics, Al-Mg-Si-Sc Alloy, Equal-Channel Angular Pressing (ECAP), Grain-Structure Stability, Ultra-Fine Structure

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