Surface-active element effects on the shape of GTA, laser, and electron-beam welds

Journal Article · Tue Mar 01 00:00:00 EST 1983 · Weld. Res. Suppl.; (United States)

OSTI ID:5866258

Heiple, C R; Roper, J R; Stagner, R T; Aden, R J

Laser and electron-beam welds were passed across selenium-doped zones in 21-6-9 stainless steel. The depth/width (d/w) ratio of a defocused laser weld with a weld pool shape similar to a GTA weld increased by over 200% in a zone where 66 ppm selenium had been added. Smaller increases were observed in selenium-doped zones for a moderately defocused electron beam weld with a higher d/w ratio in undoped base metal. When laser or electron beam weld penetration was by a keyhole mechanism, no change in d/w ratio occurred in selenium-doped zones. The results confirm the surface-tension-driven fluid-flow model for the effect of minor elements on GTA weld pool shape. Other experimental evidence bearing on the effect of minor elements on GTA weld penetration is summarized.

• Research Organization: Rockwell International Energy Systems Group, Golden, CO
• OSTI ID: 5866258
• Journal Information: Weld. Res. Suppl.; (United States), Journal Name: Weld. Res. Suppl.; (United States)
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
DOPED MATERIALS
WELDING
GAS TUNGSTEN-ARC WELDING
LASER WELDING
STAINLESS STEEL-21-6-9
CRYSTAL DOPING
ELECTRON BEAM WELDING
SELENIUM
SURFACTANTS
TRACE AMOUNTS
ALLOYS
ARC WELDING
CHROMIUM ALLOYS
CORROSION RESISTANT ALLOYS
ELEMENTS
FABRICATION
IRON ALLOYS
IRON BASE ALLOYS
JOINING
MANGANESE ALLOYS
MATERIALS
NICKEL ALLOYS
SEMIMETALS
STAINLESS STEELS
STEELS
360101* - Metals & Alloys- Preparation & Fabrication