The studies were carried out of the test of fatigue crack growth rate and relative to the microscopic morphology of fracture surface in certain high-strength steels.
本文用宏观和微观方法测量了几种高强度钢的疲劳裂纹扩展速率，用金相和断口复型法观察了疲劳断口的微观形态以及与显微组织的关系。
The microstructure, surface fracture morphology, hardness and tensile strength of the failed 45 steel connecting bolt were analyzed and tested.
对45钢连接螺栓断裂件的显微组织、断口形貌、硬度和抗拉强度进行了观察分析和测试。
The impact fracture surface morphology observed by SEM showed that the toughening mechanism of the blend was in accordance with that of the shear yielding.
共混体冲击断面形貌的SEM分析表明其增韧机理为剪切屈服机理。
According to the observed morphology on the fracture surface, the fracture surface had pseudo-cleavage feature and plastic tearing feature in the last stage of crack growth in high magnification.
高倍下观察断口发现有准解理特征，在裂纹扩展最后阶段有塑性撕裂特征。
Finally, microscopic holes are formed near the fracture surface, the morphology of which is changed with the increase of volume fraction of martensite.
微孔的形态随着马氏体的比率而变化，随着马氏体体积分数的升高，微孔形态从界面结合力的丧失转为微裂纹。
It shows good matrix-carbon fiber adhesion between the treated CF with fracture surface morphology and PA6. the mechanical property of composite is enhanced compared with pure PA6.
复合材料断面照片显示处理后的碳纤维和基体尼龙6材料有着很好的界面结合。
It shows good matrix-carbon fiber adhesion between the treated CF with fracture surface morphology and PA6. the mechanical property of composite is enhanced compared with pure PA6.
复合材料断面照片显示处理后的碳纤维和基体尼龙6材料有着很好的界面结合。
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