Statistical behaviour of interfaces subjected to curvature flow and torque effects applied to microstructural evolutions
Statistical behaviour of interfaces subjected to curvature flow and torque effects applied to microstructural evolutions
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DOI：
10.1016/j.actamat.2021.117459
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发表时间：
2021-11-11
期刊：
影响因子：
9.4
通讯作者：
Bernacki, Marc
中科院分区：
文献类型：
--
作者：
Florez, Sebastian;Alvarado, Karen;Bernacki, Marc
在纯金属和具有低浓度位错的合金中，晶界的运动已被历史证明遵循曲率流动行为。这种机制通常被称为晶粒生长（GG）。然而，最近的三维原位实验结果往往质疑这一全球性的图片有关的曲率的影响界面迁移的动力学。这篇文章解释了，由于2D各向异性全场模拟，扭矩效应如何使这些讨论复杂化。然后，它示出，在全场配方中忽略扭矩的影响，可以有一个显着的影响的GG的整体速率，晶粒和晶界的形状，以及它们的局部动力学。表观约化迁移率可能比预期的要复杂得多，而不必质疑曲率对局部动力学方程的影响。(c)2021 Acta Materialia Inc.由爱思唯尔有限公司出版。保留所有权利。
The movement of grain boundaries in pure metals and alloys with a low concentration of dislocations has been historically proved to follow curvature flow behaviour. 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 complicate these discussions. It is then illustrated that neglecting torque effects in full-field formulations can have a significant effect on the overall rate of GG, the shape of grains and grain boundaries as well as their local kinetics. The apparent reduced mobility can be much more complex than expected without necessarily questioning the influence of the curvature on the local kinetic equation. (c) 2021 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.