The failure reason of the aluminum alloy tube was investigated by macroscopic and microcosmic appearance observement, quality of material test, the stress analysis.
对失效铝合金管进行了宏观形貌观察、材质检验、 断口微观形貌观察及应力分析。
Some defects have been found in the slab structure by comparison with normal slab in microstructure through microcosmic test.
通过低倍及微观检验观察，将发生低温开裂的铸坯与正常铸坯进行微观组织对比，找出铸态组织中存在的缺陷。
This article studied the fractal characteristic of pore structure based on the fractal theory. By means of MIP experiment to test the pore structure of the concrete in terms of microcosmic.
本文以分形理论为基础研究了混凝土孔结构的分形特征，利用压汞试验从微观角度对混凝土的孔结构进行了研究。
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