Observations on surface defects, metallurgical examination and mechanical properties evaluation of the oil pipes were performed to assess the possible failure reasons.
通过对油管表面缺陷、金相组织的观察及油管力学性能的测定确定两件油管的失效原因。
Evaluation is carried out for the mechanical properties obtained from the sample cut from the rectangle block.
对从长方体试块上取样检测力学性能的判据进行了评定。
Therefore, an effective method of evaluation is needed to characterize the mechanical properties of those materials on nanometer scale.
因此需要一种行之有效的评价方法来表征这些材料在纳米尺度上的力学性能。
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