【摘要】 金相组织分析是雷电灾害鉴定的重要方法之一。通过模拟雷电流冲击的不同金属材料试验,并对其冲击材料进行金相组织分析,重点从材料微观结构变化研究雷电流对金属材料的影响。结果表明:模拟雷电流冲击后的金属材料其金相组织结构发生明显变化(缺陷增多);不同金属材料冲击后内部金相组织结构变化有明显差异;相同材质的金属材料冲击后,其金相组织结构变化幅度与其截面积大小成反比。更多还原

【Abstract】 The analysis of metallographic structure is one of the important methods for lightning disaster investigation.The metallographic structure analysis is made of different metal materials that had been impacted by simulate lightning currents,with emphasis on the influence of lightning current impulses on the metal materials through changing microstructure.The results show that the metallographic structure of the metal materials changed obviously after impacted by simulated lightning currents.The metallographic structure changes for different metal material are different obviously.For the same metal material impacted by lightning currents,the amplitude of metallographic structure change is in inverse proportion to the sectional area.更多还原