The numerical research on the effect of ultrasonic field on metallic powders produced by the ultrasonic-assisted electrical discharge process
Source abstract
Abstract
The ultrasonic-assisted electric discharge is a green, environment-friendly and easy-to-control method for preparation metallic powders. Previous experiments have proved that the two lab-made installation methods of the ultrasonic vibrator have different effects on the particle size distribution. To analyze the cause of this phenomenon, the sound pressure field in the lab-made reactor with two kinds of ultrasonic vibrator installation modes is calculated by using the finite element method. Numerical calculation results show that the sound pressure decays rapidly after 50 mm. Under the same parameters, the installation method of immersing the ultrasonic horn in the working fluid is more likely to generate ultrasonic cavitation near the electrode. When the shock wave pressure generated after cavitation bubble rupture exceeds 0.1 MPa, the particles can be sintered together after collision. As the shock wave pressure increases, the particle size range that can generate sintered necks after collision also increases. The results have great guiding significance for the design and preparation of metallic powders.
Source: expertdata · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Advanced Machining and Optimization Techniques · Ultrasound and Cavitation Phenomena · Additive Manufacturing and 3D Printing Technologies
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
References (33)
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