摘要
本文对低周疲劳载荷下网状和岛状马氏体的双相钢裂纹萌生和扩展特性进行了研究,观察分析了它们断口形貌特征和裂纹顶端不同距离处位错组态的变化规律。
The crack initiation and propagation behaviour of low cycle
tensile-compressive fatigue of the dual-phase steels with island and network
martensite has been studied.On the basis of these,the fracture surface has
been examined by SEM,and the dislocation configuration ahead of the
crack tip has been systematically observed by TEM.
关键词
双相钢
低周疲劳
断裂
机理
fracture mechanism
low cycle fatigue
dual phase steel
dislocation configuration
