高电压技术2017，Vol.43Issue(5)：1615-1620,6.DOI:10.13336/j.1003-6520.hve.20170428030
3003铝合金在雷电直击情况下的损伤特性和损伤机理
Damage Characteristics and Mechanisms of 3003 Aluminum Alloy Struck by Lightning
摘要
Abstract
Research on damage characteristics and mechanisms of aluminum alloy struck by lightning is one of the basis for lightning protection of oil tanks.Thus,using the simulated lightning current experiment method,we experimentally investigated 3003 aluminum alloy material,which is widely used in oil storage,with different components of lightning currents,and investigated its damage morphology,microstructure,and elemental composition changes by high-resolution scanning electron microscope (SEM) and X-ray energy dispersive spectrometer (EDS) analysis.Combined with the electric parameters of different components in lightning,damage characteristics and mechanisms were analyzed.The research results show that,a thin oxide layer is formed on alloy surface under the effect of first return stroke.Crack initiation is caused by oxide layer broken.Affected by continuing current of interval stroke,second-phase particles density in damage zone increases and second-phase particles size decreases.In transition zone,the content of second-phase particles significantly decreases.Dendrite and banded crystal boundary take shape in the interface between damage and transition zones.Cracks are caused by the uneven solidification.Due to long continuing current,"over-bum" phenomenon occurs.The extent of re-melting deepens and crater-like morphology appears.Lots of hydrogen evolution pores are formed by stress concentration.The research results could make a reference to the lightning protection improvement for the metal and alloy materials.关键词
雷电流/不同分量/3003铝合金/损伤特性/损伤机理/雷电直击Key words
lightning currents/different components/aluminum 3003/damage characteristics/damage mechanisms/struck by lightning引用本文复制引用
程向阳,刘亚坤,戴明秋,肖瑶,傅正财..3003铝合金在雷电直击情况下的损伤特性和损伤机理[J].高电压技术,2017,43(5):1615-1620,6.基金项目
国家自然科学基金(51577117).Project supported by National Natural Science Foundation of China(51577117). （51577117）
