Investigation of factors controlling GTA weld bead geometry

Conference · Thu Jan 01 04:00:00 EST 1981

OSTI ID:5534119

Smartt, H B; Key, J F

In welding processes employing a consumable electrode, the input of heat and mass to the fusion zone is coupled. In contrast, in the gas tungsten arc welding (GTAW) process, which uses a nonconsumable tungsten electrode, the input of heat and mass to the fusion zone are not coupled. As a result, the relationships between process parameters (current, arc voltage, welding speed, and filler wire speed) and weld bead geometry (bead width, penetration, and reinforcement) for GTA welding are complex. This work presents an experimental study of the process-parameter/weld-bead-geometry relationships for constant parameter GTAW of Type 304 stainless steel. Bead-on-plate results for partial-penetration welds in 12.5-mm thick plate, using an automatic GTAW machine, are presented. Measurements of bead width, penetration, and bead transverse cross-sectional area are given for autogenous welding; measurements of bead width, penetration, reinforcement, cross-sectional area, and dilution are given for nonautogenous welding.

• Research Organization: Idaho National Engineering Lab., Idaho Falls (USA)
• DOE Contract Number: AC07-76ID01570
• OSTI ID: 5534119
• Report Number(s): EGG-M-10581; CONF-811184-1; ON: DE82011530
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360102* -- Metals & Alloys-- Structure & Phase Studies
42 ENGINEERING
420200 -- Engineering-- Facilities
Equipment
& Techniques
ALLOYS
ARC WELDING
CHROMIUM ALLOYS
CHROMIUM STEELS
CHROMIUM-NICKEL STEELS
CORROSION RESISTANT ALLOYS
CRYSTAL STRUCTURE
ELECTRODES
FABRICATION
GAS TUNGSTEN-ARC WELDING
HEAT RESISTANT MATERIALS
HEAT RESISTING ALLOYS
IRON ALLOYS
IRON BASE ALLOYS
JOINING
JOINTS
MATERIALS
MICROSTRUCTURE
NICKEL ALLOYS
PERFORMANCE
STAINLESS STEEL-304
STAINLESS STEELS
STEELS
WELDABILITY
WELDED JOINTS
WELDING