Shape of Fusion Zone for the Welding Keyhole Induced by an Electron Beam

Abstract:

In this paper analytical predictions of the fusion zone shapes around the welding cavity produced by a moving electron beam are provided. A three-dimensional analytical model in the molten and heat-affected regions surrounding a paraboloid of revolution-shaped cavity is used to predict the shapes of the fusion zones. This work avoids the defect of the infinite temperature at the cavity base for the line-source model. Introducing a new image method, a new analytical solution is provided by satisfying exactly the adiabatic condition at the top surface. The shape of a fusion zone is governed by dimensionless parameters related to beam power per unit penetration, and the depth and shape of the cavity in this work. A three-dimensional shape of fusion zone is computed and presented in this paper. The effect of beam power per unit penetration on the shape of fusion is also discussed.

• Periodical: Materials Science Forum (Volumes 773-774)
• Pages: 812-817
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.773-774.812
• Online since: November 2013
• Authors: Ching Yen Ho, Yu Hsiang Tsai
• Keywords: Electron Beam, Fusion Zone, Shape

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