Texture induced in wavy roll-formed Al–0.73%Mg–0.38%Si alloy

Abstract

Randomization of texture in Al–0.73Mg–0.38%Si alloy has been attempted by applying the wavy roll-forming method. Rolls having a wavy-shaped surface with about 8 mm in wavelength and 3 mm in amplitude were used. Specimens were solution heat treated at 813 K for 10.8 ks. The specimen was heated at 623 K for 180 s, and then immediately wavy roll-formed. The specimen was heated again and wavy roll-formed with rotating at 90° in plane. This process was repeated 8 times, then the specimen was flattened using conventional flat rolls. Wavy roll-formed specimen at room temperature was also prepared. The roll-formed specimens were annealed and then cold-rolled at room temperature and finally annealed at 773 K for 1.8 ks. For comparison, conventional flat rolled specimens were also prepared at 623 K or room temperature. Textures formed in the specimens were analyzed by electron backscattered diffraction measurements. Grain sizes formed in the warm wavy roll-formed specimen was coarser than that in the warm rolled specimen in final annealing after cold rolling. However, grain refining was accompanied with randomization of texture in the specimen wavy roll-formed at room temperature.