No fatigue striations was observed.
没有观察到疲劳辉纹。
Crack spreading area and transient breaking are observed, typical fatigue striations, fatigue steps and secondary cracks are observed on some of the fractures.
微观上在少数油管断口中观察到了典型的疲劳辉纹，在很多断口上观察到了疲劳台阶和二次裂纹。
The correlative nature is revealed between the morphology and orientation of the striations on fatigue fracture surfaces.
疲劳辉纹的形貌特征和位向有一定的相关性。
The correlative nature is revealed between the morphology and orientation of the striations on fatigue fracture surfaces.
疲劳辉纹的形貌特征和位向有一定的相关性。
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