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Precipitation in stretched Al-Cu-Mg alloys with reduced alloying content studied by DSC, TEM and atom probe

Precipitation in stretched Al-Cu-Mg alloys with reduced alloying content studied by DSC, TEM and atom probe
Precipitation in stretched Al-Cu-Mg alloys with reduced alloying content studied by DSC, TEM and atom probe
The hardening and microstructural evolution during ageing of a Al-1.2Cu-0.5Mg and a Al-1.2Cu-1.2Mg (at.%) alloy has been investigated. Artificial ageing at 150°C of stretched and naturally aged samples initially (up to about 48 h) leads to very limited further strengthening, but ageing at 190°C results a quick increase in strength. Detailed microstructural investigation using differential scanning calorimetry, transmission electron microscopy and three-dimensional atom probe demonstrated that hardening at 150ºC is mostly dominated by the formation of solute clusters with varying compositions and plate-like zones rich in copper at early stages of ageing (t<24h) and by the formation of S phase at the later stages of ageing. At higher 190ºC no zones or clusters form and the ageing is dominated by the formation of S precipitates.
dcs, atom probe, precipitation, Al-Cu-Mg alloys, gpb zone
0878498990
396-402
923-928
Trans Tech Publications
Gao, N.
9c1370f7-f4a9-4109-8a3a-4089b3baec21
Davin, L.
9eda8125-60c9-4be9-ad97-af73b829cecb
Wang, S.
8a390e2d-6552-4c7c-a88f-25bf9d6986a6
Cerezo, A.
2071e813-6bf2-4d2e-838d-33d0220f279f
Starink, M.J.
fe61a323-4e0c-49c7-91f0-4450e1ec1e51
Gao, N.
9c1370f7-f4a9-4109-8a3a-4089b3baec21
Davin, L.
9eda8125-60c9-4be9-ad97-af73b829cecb
Wang, S.
8a390e2d-6552-4c7c-a88f-25bf9d6986a6
Cerezo, A.
2071e813-6bf2-4d2e-838d-33d0220f279f
Starink, M.J.
fe61a323-4e0c-49c7-91f0-4450e1ec1e51

Gao, N., Davin, L., Wang, S., Cerezo, A. and Starink, M.J. (2002) Precipitation in stretched Al-Cu-Mg alloys with reduced alloying content studied by DSC, TEM and atom probe. In Aluminium Alloys 2002: Their Physical and Mechanical Properties. Trans Tech Publications. pp. 923-928 .

Record type: Conference or Workshop Item (Paper)

Abstract

The hardening and microstructural evolution during ageing of a Al-1.2Cu-0.5Mg and a Al-1.2Cu-1.2Mg (at.%) alloy has been investigated. Artificial ageing at 150°C of stretched and naturally aged samples initially (up to about 48 h) leads to very limited further strengthening, but ageing at 190°C results a quick increase in strength. Detailed microstructural investigation using differential scanning calorimetry, transmission electron microscopy and three-dimensional atom probe demonstrated that hardening at 150ºC is mostly dominated by the formation of solute clusters with varying compositions and plate-like zones rich in copper at early stages of ageing (t<24h) and by the formation of S phase at the later stages of ageing. At higher 190ºC no zones or clusters form and the ageing is dominated by the formation of S precipitates.

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More information

Published date: 2002
Additional Information: Series ISSN 0255-5476
Venue - Dates: 8th International Conference ICAA8, Cambridge, UK, 2002-07-02 - 2002-07-05
Keywords: dcs, atom probe, precipitation, Al-Cu-Mg alloys, gpb zone

Identifiers

Local EPrints ID: 18830
URI: http://eprints.soton.ac.uk/id/eprint/18830
ISBN: 0878498990
PURE UUID: 076094df-9921-43a4-903e-8e096cb3857e
ORCID for N. Gao: ORCID iD orcid.org/0000-0002-7430-0319

Catalogue record

Date deposited: 12 Dec 2005
Last modified: 16 Mar 2024 03:21

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Contributors

Author: N. Gao ORCID iD
Author: L. Davin
Author: S. Wang
Author: A. Cerezo
Author: M.J. Starink

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