摘要
目的研究电脉冲辅助作用下铝合金板材的力学性能。方法通过直流电脉冲辅助单向拉伸实验,研究25 Hz频率下,不同电流密度脉冲电流对2024-T4态铝合金的力学性能的影响规律。结果在所通频率及电流密度脉冲电流作用下,随着脉冲电流密度的增加,2024-T4铝合金板延伸率和流变应力均减小,说明所采用参数脉冲电流辅助可以起到降低成形载荷的目的,但不利于提高材料成形极限。结论 25 Hz频率下脉冲电流辅助不利于2024铝合金的塑性提高,却可降低材料的成形载荷,且塑性、成形载荷随电流密度的增加而降低。
The paper aims to research the mechanical property of aluminium alloy sheet assisted by electric impulse. AC impulse assisted uniaxial tension experiment was carried out to research influence rules of pulse current with different ampere density at 25 Hz on 2024-T4 aluminum alloy. Under influences of pulse current of certain frequency and ampere density, the ductility and flow stress of 2024-T4 aluminum alloy reduced with the density increase of impulse current. The pulse current as- sistance of adopted parameters might be helpful to reduce the forming load, but it was disadvantageous to improve the forming limit of material. Pulse current assistance at 25Hz disadvantageous to improve the plasticity of 2024 aluminum alloy, but can reduce the forming load of material. In addition, the plasticity and forming load decreases with the increase of ampere density.
出处
《精密成形工程》
2017年第2期55-57,共3页
Journal of Netshape Forming Engineering
基金
中央高校基本科研业务费专项(NS2015051)
国家自然科学基金(51105203)
关键词
2024铝合金
电脉冲
单向拉伸
2024 aluminum alloy
electricity impulses
uniaxial tension
