金相观察 meaning in Chinese
metallographicobservation
Examples
- Comparison of c - scan of entire sample and the date of local point a - scan collected and processed with the metallorgaphs of sample cross section showed that the method could be used to determine the spot size of resistance spot welding
对接头焊点的c扫描及对局部点的a扫描信号的采集与分析，经负际焊点横截面的金相观察对比，可以较准确确定点焊的焊核直径。 - The serious bursting accident of the main steam pipe was analyzed 3 by applying the research results above in chapter 4 . the main steam pipe has serviced for 12 x 104h in the power plant . using scanning electron microscope ( sem ) , x - ray diffraction , optical microscope ( om ) , mechanical experiments , it is verified that the main reason causing the main steam pipe breaking down were the material and structural defects
采用扫描电镜技术、 x射线衍射技术、金相观察、机械性能测试等技术手段和失效分析方法，以某火力发电厂己服役12万余小时的主蒸汽管道为例，对其严重的爆断事故进行了失效分析，确定了管道失效的主要原因是与管道焊接的阀体存在大量的材质缺陷和结构缺陷。 - According to our experimental investigations of varying load amplitude , it was found that the phenomena of fatigue crack growth retardation occurred for pmma material following a high overload cycle exerted among the regular constant amplitude load cycles , the ratio of peak value of overload to that of the regular cycles should be over at least 1 . 35 to make the retardation taking effect . the experiment scheme for measuring the shutting - off ratio of overload ( defined as the overload ratio when da / dn < 10 - 7 / cyc . )
本文试验分析了变幅载荷对裂纹扩展的影响，证实了有机玻璃也存在超载迟滞现象，通过金相观察分析，提出超载迟滞的过程实际上是裂纹前缘萌生新的裂纹的过程的观点，同时提出超载迟滞的合理的解析，并且给出超载迟滞比，为随机载荷下疲劳扩展模型的建立提供了一个重要的参数。