Precipitation sequences in two Al-Li-Cu alloys

被引：5
作者：
Decreus, Benjamin [1 ,2 ]
De Geuser, Frederic [1 ]
Deschamps, Alexis [1 ]
Donnadieu, Patricia [1 ]
Sigli, Christophe [2 ]
机构：
[1] Grenoble INP CNRS UJF, SIMAP, BP 75, F-38402 St Martin Dheres, France
[2] Alcan Ctr Rec Voreppe, F-38341 Voreppe, France
来源：
SOLID-SOLID PHASE TRANSFORMATIONS IN INORGANIC MATERIALS, PTS 1-2 | 2011年 / 172-174卷
关键词：
Al-Cu-Li alloys; precipitation; T1; phase; small angle X-ray scattering;
D O I：
10.4028/www.scientific.net/SSP.172-174.267
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The precipitation sequences in two Al-Li-Cu alloys with similar Cu concentration and different Li concentration have been studied by small-angle X-ray scattering using synchrotron light, in combination with transmission electron microscopy. The sequence ranges from phases formed during natural ageing to the hardening ones obtained by artificial ageing at 155 degrees C. It is found that the low Li-containing alloy shows first Cu-rich clusters at room temperature followed by T-1 precipitates, while the high Li-containing alloy shows first delta'-Al3Li precipitates and then formation of T1 phase in coexistence with the delta'. The influence of alloy composition on T-1 nucleation and growth kinetics is discussed in light of the experimental results.
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页码：267 / +
页数：2
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