Numerical and Experimental Investigation of Controlled Weld Pool Displacement by Electromagnetic Forces for Joining Dissimilar Materials
Numerical and Experimental Investigation of Controlled Weld Pool Displacement by Electromagnetic Forces for Joining Dissimilar Materials
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DOI：
10.3390/met10111447
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发表时间：
2020-10
期刊：
影响因子：
2.9
通讯作者：
J. Heßmann;M. Bachmann;K. Hilgenberg
中科院分区：
文献类型：
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作者：
J. Heßmann;M. Bachmann;K. Hilgenberg
为了减少二氧化碳排放，汽车行业对轻量化结构越来越感兴趣，尤其是多材料设计方法。这里的主要建筑材料是钢和铝合金。由于这两种材料具有不同的物理性质和有限的互溶能力，它们的热连接不可能一帆风顺。本文提出了一种新的异种材料连接方法。它使用激光产生的熔池的电磁位移来产生1 mm钢(1.0330)和2 mm铝合金(EN AW5754)之间的重叠接头。非接触式感应洛伦兹力由交流(AC)磁体系统产生。通过数值模拟和实验研究，研究了铝合金熔体进入覆盖层钢板孔洞的控制位移。数值计算结果与截面和热电偶测量结果进行了比较。这是第一次有可能在薄板上实现可重复控制的熔池位移，以在不同材料之间产生重叠连接。
In order to reduce CO2 emissions, an increasing interest in lightweight construction exists in the automotive industry, especially the multi-material-design approach. The main construction materials here are steels and aluminium alloys. Due to their different physical material properties and limited mutual solubility, these two materials cannot be joined thermally without difficulty. This paper presents a new joining approach for dissimilar materials. It uses electromagnetic displacement of a laser-generated melt pool to produce overlap joints between 1 mm steel (1.0330) and 2 mm aluminium alloy (EN AW 5754). Contactless induced Lorentz forces are generated by an alternating current (AC) magnet system. The controlled displacement of the aluminium alloy melt into the hole of the overlying steel sheet is investigated through numerical and experimental studies. The numerical results are compared with cross sections and thermocouple measurements. For the first time, it is possible to achieve a reproducible controlled melt pool displacement on thin sheets to produce overlap joints between dissimilar materials.