Correlating oriented grain number density of recrystallisation in particle-containing aluminium alloys
(1. Key Laboratory of Automobile Materials, Ministry of Education, College of Materials Science and Engineering, Jilin University, Changchun 130025, China;
2. Laboratory of Thermomechanical Metallurgy - PX Group Chair, Ecole Polytechnique Fédérale de Lausanne, Neuchatel CH-2002, Switzerland;
3. Department of Materials Science and Engineering, Norwegian University of Science and Technology, Trondheim 7491, Norway)
Abstract: The recrystallized grain structure of Al-(Mn)-Fe-Si alloys after isothermal annealing was studied by electron backscatter diffraction (EBSD) technique. Statistical correlation suggests that the frequency of forming P-oriented ({011}á566？) grains at a particle larger than the critical diameter (about 1.1 μm) is about 2% when the effect of fine dispersoids and concurrent precipitation is negligible. The overall grain number density is correlated linearly with the number densities of P and Cube ({001}á100？) grains. The grain number densities of typical orientations (P, ND-rotated cube {001}á310？ and Cube) and the overall recrystallized grains increase as rolling strain increases, following a similar exponential law.
Key words: recrystallisation texture; aluminium alloys; particle-stimulated nucleation; EBSD