The University of Southampton
University of Southampton Institutional Repository

Microstructure and strengthening of Al-Li-Cu-Mg alloys and MMCs: I. Analysis and modelling of microstructural changes

Starink, M.J., Wang, P., Sinclair, I. and Gregson, P.J. (1999) Microstructure and strengthening of Al-Li-Cu-Mg alloys and MMCs: I. Analysis and modelling of microstructural changes Acta Materialia, 47, (14), pp. 3841-3853. (doi:10.1016/S1359-6454(99)00227-X).

Record type: Article

Abstract

A complete and detailed analysis of the microstructural development during ageing in an 8090 (Al–2.3Li–1.2Cu–1Mg–0.1Zr) alloy, an 8090/20 wt% SiCp MMC, an Al–1.5Li–Cu–Mg MMC and an Al–Cu–Mg MMC (all with similar Cu and Mg contents) has been performed. Volume fractions of all precipitates relevant for precipitation strengthening of the alloys (?? phase, S? phase and GPB zones) have been determined using a recently derived method based on differential scanning calorimetry (DSC). The volume fractions have subsequently been successfully fitted using a novel model for transformation kinetics. The sizes of these precipitates have been analysed using newly derived expressions consistent with the latter model. As a result of dislocation generation around misfitting SiC particles the volume fractions of both GPB zones and S? phase depend strongly on the presence of these particles. Also the amount of Li present in the alloys influences the volume fractions of the phases significantly. The sizes of S? are similar for the four alloys.

PDF 8090StrngthA.pdf - Other
Download (1MB)

More information

Published date: 1999
Keywords: differential thermal analysis (DTA), aluminium, aging, microstructure, kinetics theory and modeling

Identifiers

Local EPrints ID: 21680
URI: http://eprints.soton.ac.uk/id/eprint/21680
ISSN: 1359-6454
PURE UUID: 5ea40846-9431-40ae-af0c-e4c2cf90de3a

Catalogue record

Date deposited: 27 Feb 2007
Last modified: 17 Jul 2017 16:25

Export record

Altmetrics

Contributors

Author: M.J. Starink
Author: P. Wang
Author: I. Sinclair
Author: P.J. Gregson

University divisions

Download statistics

Downloads from ePrints over the past year. Other digital versions may also be available to download e.g. from the publisher's website.

View more statistics

Atom RSS 1.0 RSS 2.0

Contact ePrints Soton: eprints@soton.ac.uk

ePrints Soton supports OAI 2.0 with a base URL of http://eprints.soton.ac.uk/cgi/oai2

This repository has been built using EPrints software, developed at the University of Southampton, but available to everyone to use.

We use cookies to ensure that we give you the best experience on our website. If you continue without changing your settings, we will assume that you are happy to receive cookies on the University of Southampton website.

×