Electromagnetic pulse welding (EMPW) technology as a solid-state welding technique, can be used for welding dissimilar metals such as zircaloy and stainless steel. However, both zircaloy and stainless steel belong to low conductivity and deformation difficulty workpieces, making it difficult to generate sufficient electromagnetic force for metal plastic deformation and high-speed collision in transient pulsed strong magnetic fields. In this work, a method for zircaloy—stainless steel (Zr-SS) plates by EMPW based on double H-shaped welding coil and dual drive mode was be proposed. EMPW comprehensive experimental platform was established to conduct Zr-SS welding experiments under the drive of dual aluminum alloy plates. The welding effect of Zr-SS plates joint was analyzed through macroscopic morphology, microscopic characterization, and tensile testing. The results showed that a typical EMPW morphology was formed between zircaloy and stainless steel. The Zr-SS bonding interface included flat interface, wavy interface, and vortex interface. Due to the more intense collision at the vortex interface, Fe(Cr, Zr)2 were discovered. The tensile testing results showed that the bonding strength of EMPW joint was higher than that of the substrate plate (zircaloy). This work can provide experimental basis for the industrial application of low conductivity and deformation difficulty workpieces welded by EMPW.

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Interfacial Microstructure and Mechanical Property of Zircaloy-Stainless Steel Plates Joint by EMPW Based on DH Welding Coil and Dual Drive Mode

  • Chengxiang Li,
  • Dan Chen,
  • Yan Zhou,
  • Yihang Shu,
  • Zhaoxiao Wu

摘要

Electromagnetic pulse welding (EMPW) technology as a solid-state welding technique, can be used for welding dissimilar metals such as zircaloy and stainless steel. However, both zircaloy and stainless steel belong to low conductivity and deformation difficulty workpieces, making it difficult to generate sufficient electromagnetic force for metal plastic deformation and high-speed collision in transient pulsed strong magnetic fields. In this work, a method for zircaloy—stainless steel (Zr-SS) plates by EMPW based on double H-shaped welding coil and dual drive mode was be proposed. EMPW comprehensive experimental platform was established to conduct Zr-SS welding experiments under the drive of dual aluminum alloy plates. The welding effect of Zr-SS plates joint was analyzed through macroscopic morphology, microscopic characterization, and tensile testing. The results showed that a typical EMPW morphology was formed between zircaloy and stainless steel. The Zr-SS bonding interface included flat interface, wavy interface, and vortex interface. Due to the more intense collision at the vortex interface, Fe(Cr, Zr)2 were discovered. The tensile testing results showed that the bonding strength of EMPW joint was higher than that of the substrate plate (zircaloy). This work can provide experimental basis for the industrial application of low conductivity and deformation difficulty workpieces welded by EMPW.