Topic
Shielding gas
About: Shielding gas is a research topic. Over the lifetime, 6697 publications have been published within this topic receiving 58668 citations.
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TL;DR: In this article, an improved method of welding austenitic stainless steel using two series connected arcs to weld the workpiece simultaneously from opposite sides is proposed. But the method is not suitable for the use of two opposite arcs and the welding current is forced to flow from one arc to the other through the work piece.
Abstract: This study explores an improved method of welding austenitic stainless steel. The method uses two series connected arcs to weld the workpiece simultaneously from opposite sides. Owing to this arc configuration, the welding current is forced to flow from one arc to the other through the workpiece. It is known that such current flow concentrates the arcs and thus improves the penetration capability. Also, the current flowing through the workpiece generates fluid flow within the weld pool. In addition, owing to the use of the two opposite arcs, the heating tends to be symmetric. In addition to the increased penetration, the use of this method for welding austenitic stainless steel results in improved microstructure in the resultant welds because of an increased columnar to equiaxed transition and a decreased angular distortion, which sometimes induces solidification cracking.
27 citations
TL;DR: In this article, a study of fatigue strength of Al5083-O aluminum alloy to investigate influence of fatigue life on welding zone according to the mixing shield gas ratio and the test temperature.
27 citations
TL;DR: In this paper, a multiscale computational fluid-particle dynamics (CFPD) model was developed to evaluate the effects of ventilation condition, particle size, and gas species on the lung uptakes of those welding fume particles and gases.
27 citations
TL;DR: In this paper, the effects of shielding gas types and flow rates on CO2 laser weldability of DP600/TRIP700 steel sheets were studied in the presence of various shielding gases, including helium (He), argon (Ar), and different mixtures of He and Ar.
27 citations
TL;DR: A laser-induced breakdown spectroscopy (LIBS) system was combined with a bead-on-plate Tungsten Inert Gas (TIG) welding process for the in situ measurement of chemical compositions in austenitic stainless steels during welding as mentioned in this paper.
27 citations