RECRYSTALLIZATION AND TEXTURE IN HOT DEFORMED ALUMINUM-ALLOY-7010 THICK PLATES

The recrystallisation behaviour and its effect on the a crystallograph ic texture during solution heat treatment of thick aluminium alloy 701 0 plates has been studied both on commercially hot rolled plates and o n laboratory specimens deformed in plane strain compression. In additi on to X-ray macrotexture analysis, individual grain orientation measur ements within the recovered subgrains and the recrystallised new grain s were performed by means of electron backscattering diffraction. Sign ificant recrystallisation takes place during the solution treatment wi th almost no change in the macrotexture. This behaviour is explained b y the balancing effect of randomisation of the texture during recrysta llisation and texture sharpening within the recovered matrix regions. (C) 1996 The Institute of Materials.