Room temperature precipitation in quenched Al-Cu-Mg alloys: a model for the reaction kinetics and yield strength development
Room temperature precipitation in quenched Al-Cu-Mg alloys: a model for the reaction kinetics and yield strength development
The microstructural evolution during low temperature ageing of two commercial purity alloys (Al-1.2Cu-1.2Mg-0.2Mn and Al-1.9Cu-1.6Mg-0.2Mn at.%) was investigated. The initial stage of hardening in these alloys is very rapid, with the alloys nearly doubling in hardness during 20 h ageing at room temperature. The microstructural evolution during this stage of hardening was investigated using differential scanning calorimetry (DSC), isothermal calorimetry and three-dimensional atom probe analysis (3DAP). It is found that during the hardening a substantial exothermic heat evolution occurs and that the only microstructural change involves the formation of Cu-Mg co-clusters. The kinetics of cluster formation is analysed and the magnitude of the hardening is discussed on the basis of a model incorporating solid solution hardening and modulus hardening originating from the difference in modulus between Al and clusters.
precipitation, aluminium alloys, model, yield strength
1395-1417
Starink, M.J.
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Gao, N.
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Davin, L.
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Yan, J.
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Cerezo, A.
2071e813-6bf2-4d2e-838d-33d0220f279f
2005
Starink, M.J.
fe61a323-4e0c-49c7-91f0-4450e1ec1e51
Gao, N.
9c1370f7-f4a9-4109-8a3a-4089b3baec21
Davin, L.
9eda8125-60c9-4be9-ad97-af73b829cecb
Yan, J.
575a4f24-5025-4852-824a-9bc0fc40f20d
Cerezo, A.
2071e813-6bf2-4d2e-838d-33d0220f279f
Starink, M.J., Gao, N., Davin, L., Yan, J. and Cerezo, A.
(2005)
Room temperature precipitation in quenched Al-Cu-Mg alloys: a model for the reaction kinetics and yield strength development.
Philosophical Magazine, 85 (13), .
(doi:10.1080/14786430412331333374).
Abstract
The microstructural evolution during low temperature ageing of two commercial purity alloys (Al-1.2Cu-1.2Mg-0.2Mn and Al-1.9Cu-1.6Mg-0.2Mn at.%) was investigated. The initial stage of hardening in these alloys is very rapid, with the alloys nearly doubling in hardness during 20 h ageing at room temperature. The microstructural evolution during this stage of hardening was investigated using differential scanning calorimetry (DSC), isothermal calorimetry and three-dimensional atom probe analysis (3DAP). It is found that during the hardening a substantial exothermic heat evolution occurs and that the only microstructural change involves the formation of Cu-Mg co-clusters. The kinetics of cluster formation is analysed and the magnitude of the hardening is discussed on the basis of a model incorporating solid solution hardening and modulus hardening originating from the difference in modulus between Al and clusters.
Text
Phil_Mag_85-2005-1395.pdf
- Accepted Manuscript
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Published date: 2005
Keywords:
precipitation, aluminium alloys, model, yield strength
Identifiers
Local EPrints ID: 19162
URI: http://eprints.soton.ac.uk/id/eprint/19162
ISSN: 1478-6435
PURE UUID: 826c7b64-37ed-4212-9f8a-e90eb207e4a6
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Date deposited: 16 Jan 2006
Last modified: 16 Mar 2024 03:21
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Contributors
Author:
L. Davin
Author:
J. Yan
Author:
A. Cerezo
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