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| Influence of Solution Treatment on Microstructure of AEREX350 Alloy |
| WAN Wen-juan, HAN Guang-wei |
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Abstract The microstructure of hot-rolled AEREX350 alloy under various heat treatments was investigated by means of scanning electron microscopy (SEM) and transmission electron microscopy (TEM). It is found that with increasing temperature, �� phase precipitated firstly at grain boundaries in parallel at 800�� and then began precipitating within grains at about 980��. The �� phase precipitating at grain boundaries played a role on preventing the migration of grain boundaries, and that precipitating within grains would develop as Widmanstätten structure with further increasing temperature. Both �� phase dissolved at the temperature between 1085�� and 1095��, resulting in grain growth promptly due to release of pinning effect on grain boundaries. �á� phase precipitated during the process of air cooling after hot-roll, and dissolved at temperature between 1010�� and 1020��.
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Received: 26 November 2008
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2010, Vol. 17 
