Experimental measurement of thin plate SS 304 GTAW weld pool surface temperatures

Conference · Thu Jan 01 00:00:00 EST 1987

OSTI ID:6816351

Kraus, H G

The optical spectral radiometric/laser reflectance method was used to noninvasively measure arc-side GTAW weld pool surface temperatures for 1.5 mm thick plate SS 304. Weld pool surface temperature isothermal contour and topology plots, as well as lengthwise centerline temperature profiles, were generated for welder currents of 38, 50, and 70 A; welder voltages of 7.5, 8.0 and 8.5 V, respectively; and welding speeds of 0.423, 1.270, and 2.540 mm/s (1, 3, and 6 in/min), respectively. Purpose of the work was to investigate the possibility of constitutional supercooling in the tail region of the weld pools. The peak weld pool temperatures in the range of 2000 to 2800/sup 0/K were often found to lead the electrode instead of lag it. These results were compared to those for experimental measurements of electron beam welds and predictions based on vaporization theory. Under most conditions, no two weld pools are alike and that the concept of quasi-steady-state pools does not represent reality. They are instead dynamically (stochastically) varying about mean value representative characteristics. No evidence of tail region constitutional supercooling was found.

• Research Organization: EG and G Idaho, Inc., Idaho Falls (USA)
• DOE Contract Number: AC07-76ID01570
• OSTI ID: 6816351
• Report Number(s): EGG-M-17586; CONF-870372-1; ON: DE87004545
• Resource Relation: Conference: 68. annual American Welding Society convention, Chicago, IL, USA, 22 Mar 1987; Other Information: Portions of this document are illegible in microfiche products
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
STAINLESS STEEL-304
GAS TUNGSTEN-ARC WELDING
PLATES
TEMPERATURE DISTRIBUTION
ALLOYS
ARC WELDING
CHROMIUM ALLOYS
CHROMIUM STEELS
CHROMIUM-NICKEL STEELS
CORROSION RESISTANT ALLOYS
FABRICATION
HEAT RESISTANT MATERIALS
HEAT RESISTING ALLOYS
IRON ALLOYS
IRON BASE ALLOYS
JOINING
MATERIALS
NICKEL ALLOYS
STAINLESS STEELS
STEELS
WELDING
360101* - Metals & Alloys- Preparation & Fabrication