The movement of grain boundaries in pure metals and alloys with a low concentration of dislocations has been historically proved to follow curvature flow behavior. This mechanism is typically known as grain growth (GG). However, recent 3D in-situ experimental results tend to question this global picture concerning the influence of the curvature on the kinetics of interface migration. This article explains, thanks to 2D anisotropic full-field simulations, how the torque effects can complexify these discussions. It is then illustrated that neglecting torque effects in full-field formulations remains potentially a strong hypothesis. The apparent mobility can be much more complex than expected without necessarily questioning the influence of the curvature on the local kinetic equation.

中文翻译：

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受曲率流动和扭矩效应影响的界面的统计行为应用于微观结构演化

历史上已证明纯金属和合金中具有低浓度位错的晶界运动遵循曲率流动行为。这种机制通常被称为晶粒生长 (GG)。然而，最近的 3D 原位实验结果倾向于质疑这种关于曲率对界面迁移动力学影响的全局图。借助 2D 各向异性全场模拟，本文解释了扭矩效应如何使这些讨论复杂化。然后说明在全场公式中忽略扭矩效应仍然可能是一个强有力的假设。表观迁移率可能比预期复杂得多，而不必质疑曲率对局部动力学方程的影响。