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3D atom probe study of solute atoms clustering during natural ageing and pre-ageing of an Al-Mg-Si alloy |
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| Authors: | F De Geuser W Lefebvre D Blavette |
| Institution: | 1. Groupe de Physique des Matériaux – UMR CNRS 6634 , Institut des Matériaux de Rouen , 76801 Saint-Etienne-du-Rouvray Cedex, France frederic.degeuser@univ-rouen.fr;3. Groupe de Physique des Matériaux – UMR CNRS 6634 , Institut des Matériaux de Rouen , 76801 Saint-Etienne-du-Rouvray Cedex, France |
| Abstract: | The pair-correlation function applied to 3D Atom Probe reconstructed volumes has been used to study the influence of a pre-ageing treatment (363?K) on the early stages of precipitation at 458?K in an Al-Mg-Si 6016 alloy. Mg-Si short-range positive pair correlation (clustering) is shown to form after a pre-ageing treatment. The hetero-atomic clusters are thought to act as preferential nucleation sites and lead to a finer dispersion of precipitates after ageing. |
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