Texture Characteristics and Mechanical Properties of Deformed and Annealed Mg-0.4Bi Alloy

Abstract

The evolution of texture and its impact on the mechanical properties of Mg-0.4Bi alloys were investigated. The alloys were hot-rolled at 400 °C and, consequently, annealed at 250 °C for 30 and 60 min. The results indicate that the as-rolled alloy possesses a microstructure with deformed parent grains and fine dynamically recrystallized (DRX) grains. The recrystallization process was found to occur through discontinuous (DDRX), continuous (CDRX), and twin-induced (TDRX) dynamic recrystallization mechanisms. The deformed parent grains exhibited a sharp basal texture, while the recrystallized grains showed a weakened basal texture. In contrast, complete recrystallization occurred in the alloys that were rolled and then annealed for 30 and 60 min. The alloy annealed for 30 displayed a rolling direction (RD)-spread basal texture, whereas the alloy annealed for 60 min demonstrated a basal texture again. Grain boundary misorientation analysis revealed the formation of a new type of 19°[101¯0] boundaries in the as-rolled alloy and 40°[22022¯1] boundaries in the rolled and annealed alloy for 30 min. The as-rolled alloy exhibited higher tensile yield strength, while the alloy annealed for 30 min showed better elongation properties than other alloys. © 2025 Elsevier B.V., All rights reserved.