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Surrogate Model Development for Digital Experiments in Welding

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Analytical Simulation of the Microbubble Collapsing in a Welding Fusion Pool.

Ahmed Teyeb¹, Mohamad Salimi¹, Evelyne El Masri¹

¹Brunel Innovation Centre, Brunel University London, Uxbridge UB8 3PH, UK.

Materials (Basel, Switzerland)

|January 8, 2023

Summary

This study explores using remote ultrasound vibration for welding to induce cavitation, refining weld microstructure. Optimal positioning and frequencies were identified for enhanced vibration-assisted welding processes.

Keywords:

cavitation power ultrasonic vibration assisted welding

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Area of Science:

Materials Science
Mechanical Engineering
Acoustics

Background:

Ultrasound cavitation is known to refine weld grain structure and alter microstructure.
High-power ultrasound transducers (HPUTs) are practically used for plate excitation in welding.

Purpose of the Study:

To theoretically investigate plate vibration modes for remote ultrasound excitation.
To identify optimal positions and frequencies for initiating cavitation in the molten pool during welding.

Main Methods:

Theoretical analysis of plate vibration modes under ultrasound excitation.
Simulation of forced vibration, cavitation, and bursting time.
Parametric analysis of excitation location and frequency.

Main Results:

Excitation from the plate side yielded significantly higher vibration displacement amplitude (10^3) compared to corner excitation.
Identified vibration amplitude and time required for cavity generation and implosion.
Developed a computational platform for multiparametric analysis of ultrasound-initiated cavitation.

Conclusions:

Remote ultrasound vibration can be effectively optimized for welding applications.
The study provides a framework for specifying vibration-assisted welding time.
Computational modeling enables efficient analysis of cavitation phenomena in molten pools.