Fluid flow and weld penetration in stationary arc welds

Conference · · TMS (The Metallurgical Society) Paper Selection; (USA)

OSTI ID:5443871

Kou, S; Sun, D K ^[1]

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1. Univ. of Wisconsin, Madison (USA)

Weld pool fluid flow can affect the penetration of the resultant weld significantly. In this work, weld pool fluid flow and its effect on weld penetration were studied. Steady-state, 2-dimensional heat and fluid flow in stationary arc welds were computed, with three driving forces for fluid flow being considered: the buoyance force, the electromagnetic force and the surface tension gradient at the weld pool surface. The relative importance of the influence of these three driving forces on fluid flow and weld penetration was evaluated, and the role of surface active agents was discussed. The effects of the thermal expansion coefficient of the liquid metal, the current density distribution in the workpiece, and the surface tension temperature coefficient of the liquid metal on weld pool fluid flow were demonstrated.

• OSTI ID: 5443871
• Report Number(s): CONF-840909--
• Conference Information: Journal Name: TMS (The Metallurgical Society) Paper Selection; (USA) Journal Volume: 56
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360101* -- Metals & Alloys-- Preparation & Fabrication
ARC WELDING
CURRENT DENSITY
DISTRIBUTION
ELECTROMAGNETISM
ELEMENTS
EXPANSION
FABRICATION
FLUID FLOW
HEAT FLOW
JOINING
MAGNETISM
METALS
STEADY-STATE CONDITIONS
SURFACE PROPERTIES
SURFACE TENSION
SURFACTANTS
THERMAL EXPANSION
TWO-DIMENSIONAL CALCULATIONS
WELDING