austenite grain boundary

例句：

1. 1. The microstructure of the steel is characterized by its fine grain size and high density of austenite grain boundaries.
   这种钢的微观结构特征是其细粒结构和高密度的奥氏体晶界。
2. 2.During the heat treatment process, it is important to control the grain boundary diffusion to achieve the desired microstructure.
   在热处理过程中，控制晶界扩散非常重要，以获得期望的微观结构。
3. 3. Austenite grain boundaries play a crucial role in determining the mechanical properties of the steel.
   奥氏体晶界在决定钢材机械性能方面起着至关重要的作用。