论文部分内容阅读
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.
The effects of discharge voltage, radial clearance of tube and lap length on tensile and peel mechanics properties of 3A21 aluminum alloy pipe joints were investigated by means of low inductance coil magnetic pulse connection (MPJ). SEM The results show that the MPJ property changes from mechanical connection to metallurgical connection with the increase of discharge voltage.When the discharge voltage is 5.5 kV, the radial clearance is 1.5 mm and the overlap area is 3/4 Under the conditions of coil length, the metallurgical joint with small corrugation interface and interdiffusion of Al and Fe elements was obtained, and the plastic deformation and grain refinement occurred near the interface with the joint metal.