In situoptical measurement of liquid drop surface tension in gas metal arc welding
- 21 August 1998
- journal article
- Published by IOP Publishing in Journal of Physics D: Applied Physics
- Vol. 31 (16), 1963-1967
- https://doi.org/10.1088/0022-3727/31/16/004
Abstract
The surface tension of detached liquid drops in pulsed gas metal arc welding was determined in situ from the period of the prolate-oblate oscillations initiated by the detachment event. The oscillating drops were imaged by an optical shadowgraph technique utilizing laser illumination. Images obtained during the welding process were recorded with a high-speed video camera and stored for subsequent analysis. For 4047 aluminium alloy wire, surface tension values in the range 0.54-0.7 were obtained for various droplet sizes.Keywords
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