<p>The field-shaper is a key component in the electromagnetic pulse welding (EMPW) of tubular workpieces. However, during a single welding process, the metallurgical bonding occurs only at the corresponding edges of the field-shaper working area, resulting in a small welding zone. Thus, this paper proposed a kind of split-type field-shaper to extend the welding zone. Numerical analysis was used to analyze the distribution law of magnetic parameters and the kinetic behavior. AA1060 tubes and T2 copper rods were conducted with the split-type field-shaper and conventional field-shaper in the experiments. The mechanical property and microcosmic structure of joints were examined through Universal testing machine, Scanning Electron Microscopy and Energy Dispersive Spectroscopy. The findings revealed that the magnetic induction intensity and electromagnetic force under the split-type field-shaper were greater than those under the conventional field-shaper, and the collision angle and velocity were also larger. The width of the welding zone of the EMPW fabricated by split-type field-shaper increased by 26.6%, so the tensile strength increased by 16.7% compared to that of the EMPW joint fabricated by the conventional field-shaper. Moreover, no obvious intermetallic compounds were found at the bonding boundary. This research offered both theoretical insights and experimental evidence for optimizing the field-shaper in EMPW device.</p>

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Simulation and experiment of Al/Cu tube electromagnetic pulse welding based on split-type field-shaper

  • Chengxiang Li,
  • Shiyu Weng,
  • Yuanyuan Zhang,
  • Ting Shen,
  • Dan Chen,
  • Yihang Shu,
  • Zhaoxiao Wu,
  • Yan Zhou

摘要

The field-shaper is a key component in the electromagnetic pulse welding (EMPW) of tubular workpieces. However, during a single welding process, the metallurgical bonding occurs only at the corresponding edges of the field-shaper working area, resulting in a small welding zone. Thus, this paper proposed a kind of split-type field-shaper to extend the welding zone. Numerical analysis was used to analyze the distribution law of magnetic parameters and the kinetic behavior. AA1060 tubes and T2 copper rods were conducted with the split-type field-shaper and conventional field-shaper in the experiments. The mechanical property and microcosmic structure of joints were examined through Universal testing machine, Scanning Electron Microscopy and Energy Dispersive Spectroscopy. The findings revealed that the magnetic induction intensity and electromagnetic force under the split-type field-shaper were greater than those under the conventional field-shaper, and the collision angle and velocity were also larger. The width of the welding zone of the EMPW fabricated by split-type field-shaper increased by 26.6%, so the tensile strength increased by 16.7% compared to that of the EMPW joint fabricated by the conventional field-shaper. Moreover, no obvious intermetallic compounds were found at the bonding boundary. This research offered both theoretical insights and experimental evidence for optimizing the field-shaper in EMPW device.