Laser plume temperature measurements in various gases

Conference · Fri Jan 01 04:00:00 EST 1988

OSTI ID:6911268

Lewis, G K; Cremers, D A; Dixon, R D

Nd-YAG laser plume temperatures of 3000--5400K were measured on 304 stainless steel and 1100 Al in various gases using emission spectroscopy. Temperatures were higher in the reactive gases air, 02, and SF6, compared to inert gases. Ionic spectra were not observed, indicating that the plume primarily consists of hot vapors and does not contain a plasma, in contrast to CO/sub 2/ laser processing in which plasmas have been observed. The plume temperature remained constant with changes in laser power and with time during the duration of the laser pulse. Light emissions from the plume and from the cooling weld pool after the laser pulse was off were measured and correlated with melt depth. 7 refs.

• Research Organization: Los Alamos National Lab., NM (USA)
• DOE Contract Number: W-7405-ENG-36
• OSTI ID: 6911268
• Report Number(s): LA-UR-88-540; CONF-880922-2; ON: DE88006462
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360101* -- Metals & Alloys-- Preparation & Fabrication
AIR
ALLOYS
ALUMINIUM
ARGON
CHROMIUM ALLOYS
CHROMIUM STEELS
CHROMIUM-NICKEL STEELS
CORROSION RESISTANT ALLOYS
ELEMENTS
EMISSION SPECTROSCOPY
FABRICATION
FLUIDS
FLUORIDES
FLUORINE COMPOUNDS
GASES
HALIDES
HALOGEN COMPOUNDS
HEAT RESISTANT MATERIALS
HEAT RESISTING ALLOYS
HELIUM
IRON ALLOYS
IRON BASE ALLOYS
JOINING
LASER WELDING
LASERS
MATERIALS
METALS
MONITORING
NEODYMIUM LASERS
NICKEL ALLOYS
NITROGEN
NONMETALS
OXYGEN
PHYSICAL RADIATION EFFECTS
PLASMA
RADIATION EFFECTS
RARE GASES
SOLID STATE LASERS
SPECTROSCOPY
STAINLESS STEEL-304L
STAINLESS STEELS
STEELS
SULFUR COMPOUNDS
SULFUR FLUORIDES
TEMPERATURE EFFECTS
VAPORS
WELDING