Influence of high-frequency pulse on droplet transfer process and weld formation in double-wire median pulsed GMAW of aluminum alloy
Source abstract
Abstract
Abstract A double-wire median pulsed gas metal arc welding (GMAW) with a high-frequency pulse waveform was developed to study the influence of a high-frequency pulse on the droplet transfer process and weld formation in aluminum (Al) alloy. The droplet transfer process was recorded using a high-speed photography system. At the same time, the influence of a high-frequency pulse at peak stage was investigated. The experimental results demonstrated that stable droplet transfer and continuous welds are obtained by incorporating high-frequency pulses. The high-frequency pulses increase electromagnetic force and facilitate premature detachment of droplets. Especially, at a high frequency of 20 kHz, one drop per pulse (ODPP) droplet transfer mode is achieved, which is the ideal mode. In addition, high-frequency pulses increase axial arc pressure, strengthen convergent flow, and reduce the effect of divergent flow, resulting in increased weld penetration while decreasing weld width and porosity.
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Research context
OpenAlex topics: Welding Techniques and Residual Stresses · Laser Material Processing Techniques · Ultrasound and Cavitation Phenomena
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
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