Oriented Grain Growth Analyses With In Situ Annealing Experiments Using High Energy Synchrotron Radiation

The development of the recrystallization and annealing textures of Al-Mn alloys with 0.4, 0.7 and 1 wt.-% manganese is analyzed using specific techniques that allow the detection of changes in grain orientation during in situ annealing. In order to investigate the evolution of texture components during annealing, highly rolled samples were annealed from room temperature to 500 C at a constant heating rate. The advantage of in situ annealing experiments using synchrotron radiation is the detection of grain orientations over time, which allows observation of the development of the recrystallization and annealing textures in a sample. In fact, the recrystallization and annealing textures in the Al-0.4Mn are characterized by an interruption in the detection of most of the grain orientations between 380 and 425 C and by competition between the cube {001}< 100 >, {011}< 1-33 >, {011}< 0-11 > and rotated-cube {001}< 110 > grain orientations, where the latter is detected until the end of the experiment. In the Al-0.7Mn sample a competition between the cube {001}< 100 >, {011}< 100 >, and rotated cube {001}< 110 >, {011}< 0-11 > grain orientations is observed. In the sample with the highest manganese concentration (1 wt.-%) an unhindered grain growth of all possible grain orientations with a high amount of the {011}< 0-11 > grain orientation is observed. The evolution of the resulting local textures is discussed in terms of preferentially oriented grain growth depending on the temperature and manganese concentration.