Contribution of dynamic recrystallization mechanism to the transformation of orientation preference in Al-Mg-Si alloy

Abstract

Control of texture components is critical for optimizing the mechanical performance of metallic alloys, yet strategies for tailoring specific texture types remain elusive. We report the correlation between lattice rotation behavior during texture formation and distinct dynamic recrystallization (DRX) mechanisms in Al-Mg-Si alloys. Lattice rotation was further interpreted through the activation of slip systems with the maximum or secondary Schmid factor (SF). The results demonstrate that P texture develops primarily due to localized stress from dislocation accumulation, which drives grain rotation toward low-energy orientations. Under continuous dynamic recrystallization (CDRX), dislocation pile-up combined with sub-grain rotation further contributes to its stabilization. The Cube texture evolution predominantly relies on geometric dynamic recrystallization (GDRX) and discontinuous dynamic recrystallization (DDRX) mechanisms. These mechanisms provide preferential recrystallization driving forces, promoting the selective growth of grains. This study provides theoretical support for tailoring texture in Al-Mg-Si alloys through controlled DRX mechanisms during industrial rolling.