Abstract
Magnetic pulse welding is an effective way to achieve Al/Ti welding of light alloy materials via pulse electromagnetic forces. A new multi-seams structure coil applied to magnetic pulse welding technology was proposed to improve welding performance in this paper. The performance of the magnetic field, force filed, and displacement field applied by the new coil was also studied. Joining mechanism, mechanical properties and interface morphology of welded joints were studied by numerical simulation, tensile test and microscopic observation. The results show that the multi-seams coil has a larger welding area, and can improve the strength of welded joint by 28.8 % ~ 178.6 % under different standoff distance. The images from scanning electron microscopy showed that all welding interfaces were well connected without defects. And it was observed that the discharge energy would affect the welding interface morphology. This research can broaden the related applications of Al/Ti alloy welding.
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