metallographic examination
金相检验
[例句]The effects of re-al alloying on the microstructure and properties and the oxide film of the piercing plug were studied by metallographic examination , sem and x-ray diffraction.
采用金相、扫描电镜和x射线衍射等分析手段，研究稀土铝合金化对穿孔顶头组织性能及氧化膜的影响。
