skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Theoretical study of a consumable anode in a gas metal welding arc

Abstract

A better understanding of the behavior of the metal transfer process in a welding arc is important for further improvement of quality control for gas-metal-arc welding (GMAW). The problems related to the metal transfer are generally complicated because (a) the metal transfer process is strongly coupled with the arc plasma, which is not stable, for example, the length of the arc plasma varies during the formation and detachment of a metal droplet, and (b) the formation of the electrode droplet itself is influenced by energy transfer, the anode-plasma interface, and also the location of the liquid-solid interface inside the anode. This paper presents primary results of an investigation of the consumable anode in a gas metal welding arc. The study includes theoretical predictions of the properties related to metal transfer including moving anode temperature profile, welding arc length and arc current as a function of time for various wire feed rates, as well as numerical treatment of droplet formation. The anode temperature profile and the melting rate are analyzed by a metal transfer model which couples a two-dimensional arc model to a one-dimensional anode thermal model. The droplet formation is predicted by a quasi-one-dimensional dynamic model of a pendant dropmore » which accounts for the electromagnet pinch effect, the surface tension, gravitation and the momentum transfer due to wire motion. Comparison between experimental observation and theoretical predictions will also be discussed.« less

Authors:
;  [1]
  1. Univ. of Sydney (Australia)
Publication Date:
OSTI Identifier:
442961
Report Number(s):
CONF-950682-
ISBN 0-87170-567-2; TRN: IM9712%%386
Resource Type:
Book
Resource Relation:
Conference: 4. international conference on trends in welding research, Gatlinburg, TN (United States), 5-9 Jun 1995; Other Information: PBD: 1996; Related Information: Is Part Of Trends in welding research: Proceedings of the 4. international conference; Smartt, H.B.; Johnson, J.A. [eds.] [Idaho National Engineering Lab., Idaho Falls, ID (United States)]; David, S.A. [ed.] [Oak Ridge National Lab., TN (United States)]; PB: 836 p.
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; GAS METAL-ARC WELDING; MATHEMATICAL MODELS; METALS; ALLOYS; ANODES; LIQUID METALS; MASS TRANSFER; PREDICTION EQUATIONS; ELECTRIC POTENTIAL; ELECTRIC CURRENTS; HEAT FLUX; THEORETICAL DATA

Citation Formats

Zhu, P, and Simpson, S W. Theoretical study of a consumable anode in a gas metal welding arc. United States: N. p., 1996. Web.
Zhu, P, & Simpson, S W. Theoretical study of a consumable anode in a gas metal welding arc. United States.
Zhu, P, and Simpson, S W. 1996. "Theoretical study of a consumable anode in a gas metal welding arc". United States.
@article{osti_442961,
title = {Theoretical study of a consumable anode in a gas metal welding arc},
author = {Zhu, P and Simpson, S W},
abstractNote = {A better understanding of the behavior of the metal transfer process in a welding arc is important for further improvement of quality control for gas-metal-arc welding (GMAW). The problems related to the metal transfer are generally complicated because (a) the metal transfer process is strongly coupled with the arc plasma, which is not stable, for example, the length of the arc plasma varies during the formation and detachment of a metal droplet, and (b) the formation of the electrode droplet itself is influenced by energy transfer, the anode-plasma interface, and also the location of the liquid-solid interface inside the anode. This paper presents primary results of an investigation of the consumable anode in a gas metal welding arc. The study includes theoretical predictions of the properties related to metal transfer including moving anode temperature profile, welding arc length and arc current as a function of time for various wire feed rates, as well as numerical treatment of droplet formation. The anode temperature profile and the melting rate are analyzed by a metal transfer model which couples a two-dimensional arc model to a one-dimensional anode thermal model. The droplet formation is predicted by a quasi-one-dimensional dynamic model of a pendant drop which accounts for the electromagnet pinch effect, the surface tension, gravitation and the momentum transfer due to wire motion. Comparison between experimental observation and theoretical predictions will also be discussed.},
doi = {},
url = {https://www.osti.gov/biblio/442961}, journal = {},
number = ,
volume = ,
place = {United States},
year = {1996},
month = {12}
}

Book:
Other availability
Please see Document Availability for additional information on obtaining the full-text document. Library patrons may search WorldCat to identify libraries that hold this book.

Save / Share: