Abstract
This paper mainly demonstrates an advanced type of the vaporizing foil actuator welding (VFAW) process between GPa-grade steel (TRIP1180) and aluminum alloy (AA5052-H32) without applying standoff. To secure a flying distance during the VFAW process, the preformed target sheet shaped like a circular indentation has been utilized. It is necessary to optimize process parameters integrated with geometrical design of the preform since the welding strength can be decreased beyond the optimum input energy in the standoff-free VFAW process. The welded surface was evaluated by SEM-EDS, XRD, EBDS, and TEM to analyze the welding mechanism and composition at the welding interface. The diffusion zone including the AlFe3 phase was observed at the welded interface which has high grain density due to the high-speed impact by increasing the welding strength, which leads to the perfect welding between the dissimilar materials.
Highlights
(VFAW) process between GPa-grade steel (TRIP1180) and aluminum alloy (AA5052-H32) without applying standoff
The generated explosive pressure sharply pushes sheet withsheet substantially high velocity, and it distributes along the welding interface, which the flyer with substantially high velocity, and it distributes along the welding intertends to induce antooblique between thebetween target and flyer sheets as shown in shown face, which tends induceangle an oblique angle the target and flyer sheets as
We have proposed a standoff-free vaporizing foil actuator welding (VFAW) process without applying a
Summary
There is an increasing demand for a lightweight design in the body structure of the transportation vehicles, especially for electric and hybrid cars to achieve high energy efficiency [1,2] and decrease gas emissions [3,4]. Which does not involve the conventional full melting of the materials being joined The generated explosive pressure sharply pushes sheet withsheet substantially high velocity, and it distributes along the welding interface, which the flyer with substantially high velocity, and it distributes along the welding intertends to induce antooblique between thebetween target and flyer sheets as shown in shown. Between sheets by attaching clean metallic surfaces [25,26]
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