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

Journal Article · Tue Mar 01 04:00:00 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); ISSN WERSA
• Country of Publication: United States
• Language: English

Related Subjects

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