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Influence of cold work and solutionising temperature on age hardening capability of Al-Mg-Mn alloys with small Cu and Si additions

Zhu, Z. and Starink, M.J., (2005) Influence of cold work and solutionising temperature on age hardening capability of Al-Mg-Mn alloys with small Cu and Si additions Howe, J.M., Laughlin, D.E., Lee, J.K., Srolovitz, D.J. and Dahmen, U. (eds.) In Solid-Solid Phase Transformations in Inorganic Materials 2005. The Minerals, Metals & Materials Society., pp. 383-390.

Record type: Conference or Workshop Item (Paper)

Abstract

The influence of cold rolling and solution treatment on precipitation in Al-(1-3)Mg-0.25Mn-(0 0.4)Cu-0.15Si (wt%) alloys was investigated. After solutionising at 550°C, all alloys showed age hardening, and differential scanning calorimetry (DSC) confirmed the occurrence of precipitation reaction(s) in each alloy. After solutionising at 500°C, all Cu-containing alloys showed precipitation hardening; for Cu-free alloys, only the alloy with 1wt% Mg showed precipitation hardening, and no substantial precipitation hardening was observed for alloys with Mg content 2wt% or higher. This observed suppression of age hardening with increasing Mg content for Cu-free alloys was analysed with reference to the undissolved Mg2Si intermetallics formed during solution treatment. These intermetallics were characterised using FEG-SEM and EDS. For the age hardening alloys solutionised at 500°C, both the time to peak ageing and the amount of precipitation hardening decrease with increasing cold rolling reduction.

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More information

Published date: 2005
Venue - Dates: Solid-to-Solid Phase Transformation in Inorganic Materials Conference, 2005-05-29 - 2005-06-03
Keywords: Age hardening capability, precipitation, recovery, Al-Mg-Mn alloys, 5xxx alloys, canstock, S phase, DSC, hardness

Identifiers

Local EPrints ID: 23914
URI: http://eprints.soton.ac.uk/id/eprint/23914
ISBN: 0873396080
PURE UUID: 9ec5460f-9c9c-4b6a-be18-ef249d7fe552

Catalogue record

Date deposited: 31 Mar 2006
Last modified: 17 Jul 2017 16:15

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Contributors

Author: Z. Zhu
Author: M.J. Starink
Editor: J.M. Howe
Editor: D.E. Laughlin
Editor: J.K. Lee
Editor: D.J. Srolovitz
Editor: U. Dahmen

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