Computational modeling of GTA (gas tungsten arc) welding with emphasis on surface tension effects

Conference · Mon Jan 01 00:00:00 EST 1990

OSTI ID:6292869

Zacharia, T; David, S A

A computational study of the convective heat transfer in the weld pool during gas tungsten arch (GTA) welding of Type 304 stainless steel is presented. The solution of the transport equations is based on a control volume approach which utilized directly, the integral form of the governing equations. The computational model considers buoyancy and electromagnetic and surface tension forces in the solution of convective heat transfer in the weld pool. In addition, the model treats the weld pool surface as a deformable free surface. The computational model includes weld metal vaporization and temperature dependent thermophysical properties. The results indicate that consideration of weld pool vaporization effects and temperature dependent thermophysical properties significantly influence the weld model predictions. Theoretical predictions of the weld pool surface temperature distributions and the cross-sectional weld pool size and shape wee compared with corresponding experimental measurements. Comparison of the theoretically predicted and the experimentally obtained surface temperature profiles indicated agreement with {plus minus} 8%. The predicted weld cross-section profiles were found to agree very well with actual weld cross-sections for the best theoretical models. 26 refs., 8 figs.

• Research Organization: Oak Ridge National Lab., TN (USA)
• Sponsoring Organization: DOE/ER
• DOE Contract Number: AC05-84OR21400
• OSTI ID: 6292869
• Report Number(s): CONF-910318-12; ON: DE91004771
• Resource Relation: Conference: 13. ASME-JSME international solar energy conference, Reno, NV (USA), 17-22 Mar 1991
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
STAINLESS STEEL-304
ARC WELDING
CONVECTION
EVAPORATION
HEAT TRANSFER
MATHEMATICAL MODELS
SURFACE TENSION
TEMPERATURE DEPENDENCE
ALLOYS
AUSTENITIC STEELS
CHROMIUM ALLOYS
CHROMIUM-NICKEL STEELS
CORROSION RESISTANT ALLOYS
ENERGY TRANSFER
FABRICATION
HEAT RESISTANT MATERIALS
HEAT RESISTING ALLOYS
HIGH ALLOY STEELS
IRON ALLOYS
IRON BASE ALLOYS
JOINING
MASS TRANSFER
MATERIALS
NICKEL ALLOYS
PHASE TRANSFORMATIONS
STAINLESS STEELS
STEEL-CR19NI10
STEELS
SURFACE PROPERTIES
WELDING
360101* - Metals & Alloys- Preparation & Fabrication