A study of recrystallisation textures in hot band of a continuous cast Al-Mn-Mg alloy

The hot band of a commercial continuous cast (CC) Al-Mg-Mn alloy was annealed at different temperatures ranging from room temperature to 510°C for 3 h. The evolution of microstructure and crystallographic texture was investigated during the annealing treatment. It was found that the recrystallised alloy exhibited a severely elongated grain structure and a texture that consisted of a new type of component ({113} <110>) and two fibre components (<100>//ND and <110>//ND), the axes of which were along the normal direction of the rolling plane (ND) in <100> and <110> respectively. The <100>//ND fibre was dominated by a ND rotated cube orientation {001}<310>, while the <110>//ND fibre was mainly composed of Goss and P orientation ({011}<566>). The formation of the {113}<110> texture and two fibre textures was likely to be attributed to the concurrent precipitation effect taking place upon heating in annealing treatment of the alloy.