Microstructure control during severe plastic deformation of Al-Cu-Li and the influence on strength and ductility

作者：Munoz Morris M A; Morris D G^*

来源：Materials Science and Engineering A-Structural Materials Properties Microstructure and Processing, 2011, 528(9): 3445-3454.

DOI：10.1016/j.msea.2011.01.036

• Severe plastic deformation
• Equal channel angular pressing
• Aluminium alloy
• Mechanical properties

The microstructure and mechanical behaviour of an Al-Cu-Li alloy has been examined after processing over a wide range of conditions involving severe deformation at elevated temperatures with prior or subsequent heat treatments. Dislocation cellular or subgrain structures are obtained, with varying degrees of precipitation. High strength, as well as poor ductility, can be correlated with the presence of a high density of fine It phase precipitates, with the dislocation substructure playing a smaller role. Careful control of processing conditions allows a suitable combination of good strength with ductility to be obtained.

• 出版日期2011-4-15