INFLUENCE OF DEFORMATION TEMPERATURE AND STRAIN-RATE ON THE RECRYSTALLIZATION NUCLEATION IN AL-MN1-MG1

During recrystallization annealing of cold rolled particle containing Al alloys particle stimulated nucleation (PSN) can occur which gives r ise to a substantial weakening of the typical Cube-orientation in the recrystallization textures. After deformation at elevated temperature, in contrast, a strong Cube-texture prevails in the same alloys after recrystallization. In the present paper, this change in recrystallizat ion mechanism is examined by microstructural investigation and texture measurements in samples of the alloy Al-Mnl-Mgl (AA3004, can body sto ck), which were deformed at different temperatures. Besides hot rollin g, plane strain compression (PSC) tests were employed, which allowed t o reproduce the deformation temperature and the strain rate much more accurately than it is possible during hot rolling on a laboratory scal e. From the results obtained the deformation parameters for the transi tion from a recrystallization texture as characterized by PSN to the C ube-texture were determined. The influence of the deformation temperat ure and the strain rate on the mechanisms of recrystallization nucleat ion is discussed and a