We found a match
Your institution may have rights to this item. Sign in to continue.
- Title
Effect of active flux addition on laser welding of austenitic stainless steel.
- Authors
Kaul, R.; Ganesh, P.; Singh, N.; Jagdheesh, R.; Bhagat, M. S.; Kumar, H.; Tiwari, P.; Vora, H. S.; Nath, A. K.
- Abstract
The use of active flux in tungsten inert gas (TIG) welding is known to increase its weld depth. The present paper involves study of active flux laser beam welding (ALBW) of austenitic stainless steel sheets with respect to its effect on plasma plume, microstructure and mechanical properties of the resultant weldments. ALBW performed with SiO2 as the flux significantly modified shape of the fusion zone (FZ) to produce narrower and deeper welds. Plasma plume associated with the process was considerably smaller and of lower intensity than that produced during bead on plate laser beam welding (LBW). Flux addition during LBW produced thin and rough weld bead associated with humping. The development of such a weld bead is cause by reversal in the direction of Marangoni flow by oxygen induced inversion of surface tension gradient, widely fluctuating plasma plume and presence of oxides on the weld pool surface preventing free flow of the melt. Active flux laser weldments exhibited lower ductility than that of bead on plate laser weldments.
- Subjects
GAS tungsten arc welding; LASER welding; STAINLESS steel; MICROSTRUCTURE; PROPERTIES of matter; DUCTILITY
- Publication
Science & Technology of Welding & Joining, 2007, Vol 12, Issue 2, p127
- ISSN
1362-1718
- Publication type
Article
- DOI
10.1179/174329307X159793