利用低电感线圈磁脉冲连接(MPJ)装置,研究了放电电压,管件径向间隙和搭接区长度对3A21铝合金-20钢管连接接头拉伸和剥离力学性能的影响.通过SEM进行了接头界面的微观形貌观察和元素分布的EDS分析.结果表明,随放电电压提高,MPJ性质由机械连接向冶金连接转变.在放电电压为5.5 kV、径向间隙为1.5 mm、搭接区为3/4线圈长度条件下,获得界面呈小波纹状、Al和Fe元素发生互扩散的冶金接头.与接头界面临近的基体金属发生了剧烈塑性变形和晶粒细化.
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