Recent progress in the kinetics of grain coarsening and abnormal grain growth (AGG) is presented in this overview article. The factors affecting the kinetics of grain growth is reviewed with the emphasis on the recent findings on the solute drag and Zener pinning effects as well as the special case of duplex alloys, where the latter is discussed for the behavior of dual-phase steels during intercritical annealing. The common isothermal kinetics models for grain growth are listed, which is followed by the critical discussion on the simplifications and the commonly used methods for the determination of grain growth exponent (n) and activation energy (Q). The obtained values of n and Q for several classes of important engineering alloys such as microalloyed steels, stainless steels, magnesium alloys, aluminum alloys, titanium alloys, and high-entropy alloys are summarized with the discussion on the obtained values of kinetics parameters and their deviation from the theoretical expectations. Finally, the factors leading to AGG (such as the coarsening and dissolution of pinning particles and the crystallographic texture), the proposed mechanisms (such as the solid-state wetting and the grain boundary faceting/defaceting phenomena), and the kinetics of AGG (based on the empirical power law and the similarity of AGG to primary recrystallization in the form of secondary recrystallization) are reviewed. This overview can shed light on the understanding of grain growth and its effects.

本概述文章介绍了晶粒粗化和异常晶粒生长（AGG）动力学的最新进展。综述了影响晶粒生长动力学的因素，重点是关于溶质阻力和齐纳钉扎效应的最新发现以及双相合金的特殊情况，其中讨论了双相合金在临界状态下双相钢的行为。退火。列出了晶粒长大的常用等温动力学模型，随后进行了简化的批判性讨论以及确定晶粒长大指数（n）和活化能（Q）的常用方法。获得的n和Q值针对几种重要的工程合金，例如微合金钢，不锈钢，镁合金，铝合金，钛合金和高熵合金，进行了总结，并讨论了动力学参数的获得值及其与理论值的偏差。最后，导致AGG的因素（例如，钉扎粒子的粗化和溶解以及晶体结构），提出的机制（例如，固态润湿和晶界刻面/脱乙酰现象）以及AGG的动力学（基于经验功率定律和AGG与二次重结晶形式的一次重结晶的相似性进行了综述。本概述可以帮助您了解谷物的生长及其影响。