Theoretical Analysis of Weld Pool Behavior in the Pulsed Current GTAW Process

[+] Author and Article Information
C. L. Tsai

Department of Welding Engineering, The Ohio State University, Columbus, OH

C. A. Hou

Department of Mechanical Engineering, Howard University, Washington, DC

J. Heat Transfer 110(1), 160-165 (Feb 01, 1988) (6 pages) doi:10.1115/1.3250447 History: Received April 24, 1984; Online October 20, 2009


A general, three-dimensional, closed-form welding heat-flow solution, which is capable of analyzing thermal behavior of the weldment in its transient state and/or under time-dependent power change during welding, is presented. The analytical model utilizes the finite heat source theory with a Gaussian distribution and also considers the effects of finite plate thickness. The numerical values of the solution are calculated using the computational schemes on a minicomputer. In this paper the welding parameters of the pulsed current GTAW were studied using the solution. Two sets of pulsation parameters were analyzed and their sensitivity to the heat input control were evaluated.

Copyright © 1988 by ASME
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