The twinning behavior, dynamic recrystallization (DRX) mechanism and the resultant texture evolution of the extruded Mg-xBi (x=0.5 wt.%, 2.0 wt.%) alloys were systematically investigated during hot compression at the strain rate of 10 s⁻¹ and temperature of 200°C. The results indicate that the types and intensities of the texture are greatly dependent on the twining behavior and DRX mechanism. At the initial stage, the evolution of texture is mainly domination by the formation and variation of $\left\{10\overline{1}2\right\}$ extension twins, which is beneficial to the compression direction (CD) -tilted basal texture. With an increase in the strain, the texture evolution is more greatly regulated by the DRX mechanism. Besides, the pyramidal <c + a> slip and basal <a> slip are activated during the compression process, resulting in the Schmid factors (SF) of pyramidal slip remain at ∼0.4 and the average SFs for basal <a> slip increase from 0.2 to 0.34 as the strain increase. These findings provide a new insight into controlling the texture of wrought Mg-Bi-based alloys during hot deformation processing.

在应变速率为 10 s 的热压缩过程中系统地研究了挤压 Mg- x Bi ( x =0.5 wt.%, 2.0 wt.%) 合金的孪生行为、动态再结晶 (DRX) 机制和由此产生的织构演变^{- 1}和 200°C 的温度。结果表明，纹理的类型和强度在很大程度上取决于缠绕行为和 DRX 机制。在初始阶段，织构的演化主要受织构的形成和变异支配。$\left\{10\overline{1}2\right\}$延伸孪晶，这有利于压缩方向 (CD) 倾斜的基底纹理。随着应变的增加，纹理演变受到 DRX 机制的更大程度的调节。此外，锥体< c  +  a >滑移和基底< a >滑移在压缩过程中被激活，导致锥体滑移的施密特因子（SF）保持在~0.4，并且基底< a >滑移的平均SFs从随着应变的增加，0.2 到 0.34。这些发现为在热变形加工过程中控制锻造镁铋基合金的织构提供了新的见解。