三种冲击电流连续作用下铝3003合金的损伤特性

doi:10.19595/j.cnki.1000-6753.tces.190068

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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 words： Al alloy multiple impulse currents damage mechanisms damage characteristics micro-hardness

Received: 10 January 2019 Published: 27 March 2020

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	Liu Yakun
	Dai Mingqiu
	Bi Xiaolei
	Liu Juan
	Fu Zhengcai

Cite this article:

Liu Yakun,Dai Mingqiu,Bi Xiaolei等. Damage Characteristics of Al Alloy 3003 Suffered fromThree Continuous Impulse Currents[J]. Transactions of China Electrotechnical Society, 2020, 35(6): 1173-1180.

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https://dgjsxb.ces-transaction.com/EN/10.19595/j.cnki.1000-6753.tces.190068 OR https://dgjsxb.ces-transaction.com/EN/Y2020/V35/I6/1173

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