英语语法分析

The effects of testing temperature on notch impact strength, fractographic features and fracture surface roughness of PVC have been studied.

研究了温度对聚氯乙烯PVC缺口冲击强度、断口形貌特征及断面粗糙度的影响。

Fractographic observations showed that hydrogen could induce surface cracks for smooth specimens and a cleavage fracture pattern for notch specimens at RT.

破断面观察结果显示，在室温中，氢气会导致平滑试片在表面形成裂纹，而在凹槽试片中产生劈裂破坏形态。

The mechanical properties testing, microstructure observation and fractographic features analysis of the troostite high chromium cast iron blade were carried out.

通过金相、性能和热处理试验，对盘条拉丝断裂原因进行了分析，认为盘条存在屈氏体组织是断裂的根本原因。