Weld pool oscillation during GTA welding of mild steel

Journal Article · Sun Aug 01 00:00:00 EDT 1993 · Welding Journal (Miami); (United States)

OSTI ID:6328378

Xiao, Y H; Ouden, G den ^[1]

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1. Delft Univ. of Tech., Delft (Netherlands). Dept. of Materials Science and Engineering

In this paper the results are reported of a study dealing with the oscillation behavior of weld pools in the case of GTA bead-on-plate welding of mild steel, Fe 360. During welding, the weld pool was brought into oscillation by applying short current pulses, and the oscillation frequency and amplitude were measured by monitoring the arc voltage. It was found that the oscillation of the partially penetrated weld pool is dominated by one of two different oscillation modes (Mode 1 and Mode 2) depending on the welding conditions, whereas the oscillation of the fully penetrated weld pool is characterized by a third oscillation mode (Mode 3). It is possible to maintain partially penetrated weld pool oscillation in Mode 1 by choosing appropriate welding conditions. Under these conditions, an abrupt decrease in oscillation frequency occurs when the weld pool transfers from partial penetration to full penetration. Thus, weld penetration can be in-process controlled by monitoring the oscillation frequency during welding.

• OSTI ID: 6328378
• Journal Information: Welding Journal (Miami); (United States), Vol. 72:8; ISSN 0043-2296
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
STEELS
GAS TUNGSTEN-ARC WELDING
LIQUID METALS
MELTING
OSCILLATIONS
PERFORMANCE
PROCESS CONTROL
REAL TIME SYSTEMS
ALLOYS
ARC WELDING
CONTROL
ELEMENTS
FABRICATION
FLUIDS
GAS METAL-ARC WELDING
IRON ALLOYS
IRON BASE ALLOYS
JOINING
LIQUIDS
METALS
PHASE TRANSFORMATIONS
WELDING
360101* - Metals & Alloys- Preparation & Fabrication