Room temperature precipitation in quenched Al-Cu-Mg alloys: a model for the reaction kinetics and yield strength development
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), 1395-1417. (doi:10.1080/14786430412331333374)
Download
| PDF - Post print 434Kb |
Official URL: http://dx.doi.org/10.1080/14786430412331333374
Description/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.
| Item Type: | Article |
|---|---|
| ISSN: | 1478-6435 (print) |
| Uncontrolled Keywords: | precipitation, aluminium alloys, model, yield strength |
| Related URLs: | http://www.metapress.com/openu...2331333374 http://dx.doi.org/10.1080/1478...2331333374 |
| Subjects: | T Technology > TN Mining engineering. Metallurgy Q Science > QC Physics |
| Divisions: | University Structure - Pre August 2011 > School of Engineering Sciences |
| ePrint ID: | 19162 |
| URI: | http://eprints.soton.ac.uk/id/eprint/19162 |
| Deposited On: | 16 Jan 2006 |
| Last Modified: | 02 Mar 2012 11:45 |
Associated Staff Only: edit my ePrint

