Recent findings about the role of the grain boundary energy in complexion transitions are reviewed. Grain boundary energy distributions are most commonly evaluated using measurements of grain boundary thermal grooves. The measurements demonstrate that when a stable high temperature complexion co-exists with a metastable low temperature complexion, the stable complexion has a lower energy. It has also been found that the changes in the grain boundary energy lead to changes in the grain boundary character distribution. Finally, recent experimental observations are consistent with the theoretical prediction that higher energy grain boundaries transform at lower temperatures than relatively lower energy grain boundaries. To better control microstructures developed through grain growth, it is necessary to learn more about the mechanism and kinetics of complexion transitions.

综述了有关晶界能在肤色转变中的作用的最新发现。最常使用晶界热槽的测量来评估晶界能量分布。测量表明，当稳定的高温肤色与亚稳态的低温肤色共存时，稳定的肤色具有较低的能量。还已经发现，晶界能量的变化导致晶界特征分布的变化。最后，最近的实验观察结果与理论预测一致，即较高能量的晶界在较低的温度下发生转变，而相对能量较低的晶界在较低的温度下发生转变。为了更好地控制通过晶粒生长而形成的微结构，