Numerical simulation of electron beam welding with beam oscillations

• Published in: IOP conference series. Materials Science and Engineering 2017-03, Vol.177 (1), p.12085
• Main Authors: Trushnikov, D N, Permyakov, G L
• Format: Article
• Language: English
• Subjects: Computational fluid dynamics; Conduction heating; Conductive heat transfer; Electron beam welding; Liquid phases; Marangoni convection; Mass transfer; Mathematical models; Oscillations; Phase transitions; Process parameters; Shape effects; Solid phases; Thermocapillary convection; Three dimensional models; Welding parameters
• ISSN: 1757-8981; 1757-899X
• DOI: 10.1088/1757-899X/177/1/012085

This research examines the process of electron-beam welding in a keyhole mode with the use of beam oscillations. We study the impact of various beam oscillations and their parameters on the shape of the keyhole, the flow of heat and mass transfer processes and weld parameters to develop methodological recommendations. A numerical three-dimensional mathematical model of electron beam welding is presented. The model was developed on the basis of a heat conduction equation and a Navier-Stokes equation taking into account phase transitions at the interface of a solid and liquid phase and thermocapillary convection (Marangoni effect). The shape of the keyhole is determined based on experimental data on the parameters of the secondary signal by using the method of a synchronous accumulation. Calculations of thermal and hydrodynamic processes were carried out based on a computer cluster, using a simulation package COMSOL Multiphysics.