The fracture section of steel 80 wire rods was analyzed by SEM and metallographic microscope, and the related batch of wire rods was physically tested and chemically analyzed.
用扫描电镜、金相显微镜观察分析了80钢盘条拉拔断裂的断口，并对盘条进行了理化检验分析。
Failure of cast aluminium alloy box was analysed by metallographic and fractographic analysis, and cast defect and variation of cross section thickness were identified as main causes of failure.
通过金相及电镜断口分析，确定箱体失效系铸造缺陷和几何截面差过大所致。
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