The loading rates causing the changes for the fine grain size microstructure are higher than those for the coarse grain size microstructure. The cleavage fracture stress σf and the notch toughness are related with fracture mode and critical event.
细晶试样发生转变的加载速率高于粗晶试样，解理断裂应力σ_f、缺口韧性与断裂模式和临界事件相关，在延—脆转变断裂模式和扩展控制的临界事件下，解理断裂应力σ_f和缺口韧性较高。
参考来源 - 加载速率对不同组织合金钢缺口试样断裂行为的影响·2,447,543篇论文数据，部分数据来源于NoteExpress
The local cleavage fracture stress is mainly determined by the length of the critical microcrack.
细观解理断裂应力主要由临界裂纹的长度决定。
Dimensions of the stress and crystalline have influence on cleavage fracture.
应力的大小和晶粒的尺寸影响解理断裂。
Scanning electron microscopy analysis on blade fracture shows: the fracture is characterized by cleavage, quasi-cleavage and stress corrosion and so on.
对叶片断口扫描电镜分析显示，断口具有准解理、韧窝、应力腐蚀等复杂特征。
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