电工技术学报  2020, Vol. 35 Issue (6): 1173-1180    DOI: 10.19595/j.cnki.1000-6753.tces.190068
电工理论与新技术 |
三种冲击电流连续作用下铝3003合金的损伤特性
刘亚坤1, 戴明秋1, 毕晓蕾2, 刘娟2, 傅正财1
1. 上海交通大学电气工程系电力传输与功率变换控制教育部重点实验室 上海 200240;
2. 中石化股份有限公司青岛安全工程研究院化学品安全控制国家重点实验室 青岛 266071
Damage Characteristics of Al Alloy 3003 Suffered fromThree Continuous Impulse Currents
Liu Yakun1, Dai Mingqiu1, Bi Xiaolei2, Liu Juan2, Fu Zhengcai1
1. Key Laboratory of Control of Power Transmission and Conversion Ministry of Education Shanghai Jiao Tong University Shanghai 200240 China;
2. State Key Laboratory of Chemicals Safety China Petroleum & Chemical Corporation Safety Engineering Institute Qingdao 266071 China;
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摘要 研究多种冲击电流连续作用下金属的损伤特性是揭示金属遭受雷击时损伤机理的有效手段;通过观测和对比三种冲击电流单独和连续作用下金属的表面损伤形貌、剖面损伤组织特征、元素含量变化和显微硬度变化,分析三种冲击电流单独和连续作用下金属的损伤机理和损伤特性;讨论多种冲击电流连续作用对金属损伤特性的影响;总结多种冲击电流连续作用下金属损伤出现的典型特征。结果表明,电流幅值为404A的矩形波输出同时依次叠加幅值为150kA的30/80μs电流波和幅值为2.0kA的2ms方波的组合电流作用下,3003铝合金的损伤面积为3 156.0mm2,损伤深度为4.7mm,氧元素含量增加35.56%,显微硬度值增加至78.5,相比于主导损伤对应的单一冲击电流作用下,金属的损伤面积、损伤深度、损伤区氧元素含量和显微硬度值分别增大了15.5%、42.4%、21.3%和2.7%;多种冲击电流连续作用下,金属损伤出现了深度加深和裂纹加剧的典型特征。
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刘亚坤
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傅正财
关键词 铝合金冲击电流损伤机理损伤特性显微硬度    
Abstract:Research on the damage characteristics of metal material subjected to the multiple continuous impulse currents (MCIC) is an effective method to reveal the damage mechanisms of metal suffered from natural lightning. Therefore, the damage morphology on surface, microstructure in the cross section, element composition changes, and micro-hardness changes are measured and compared under MCIC and single impulse current (SIC). The influence of the MCIC on metal damage is discussed. The results show that, under the combined current of a rectangular waveform with a current amplitude of 404A, a 30/80μs impulse with a current amplitude of 150kA and a 2ms square waveform with a current amplitude of 2kA, the damaged area of Al alloy 3003 is 3 156.0mm2, the damaged depth is 4.7mm, the oxygen content increases by 35.56%, and the micro-hardness increases to 78.5. The results increase by 15.5%, 42.4%, 21.3%, and 2.7%, respectively, compared with the counterparts of SIC. The crack phenomenon of metal intensifies in the case struck by MCIC.
Key wordsAl alloy    multiple impulse currents    damage mechanisms    damage characteristics    micro-hardness   
收稿日期: 2019-01-10      出版日期: 2020-03-27
PACS: TM85  
基金资助:国家自然科学基金资助项目(51577117)
通讯作者: 傅正财 男,1965年生,教授,博士生导师,研究方向为高电压试验技术与试验设备开发,电力系统过电压与防雷保护。E-mail: zcfu@sjtu.edu.cn   
作者简介: 刘亚坤 男,1992年生,博士,研究方向为雷电效应和防雷保护。E-mail: liuyakunhv@163.com
引用本文:   
刘亚坤, 戴明秋, 毕晓蕾, 刘娟, 傅正财. 三种冲击电流连续作用下铝3003合金的损伤特性[J]. 电工技术学报, 2020, 35(6): 1173-1180. Liu Yakun, Dai Mingqiu, Bi Xiaolei, Liu Juan, Fu Zhengcai. Damage Characteristics of Al Alloy 3003 Suffered fromThree Continuous Impulse Currents. Transactions of China Electrotechnical Society, 2020, 35(6): 1173-1180.
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