Glossary - G
The state of matter in which molecules move freely, so allowing it to expand completely to fill any space that it occupies. A gas, or a mixture of gases, produced as a result of a welding or cutting operation. Gaseous fume tends to be process dependent, and does not normally come from the consumables or parent plate. Pressure relative to atmospheric pressure. A mode of transfer falling between dip and spray. In globular transfer the wire melts and the droplets fall into the weld pool under the force of gravity. This mode is characterised by the high spatter and particulate fume levels produced and by it's poor arc stability. Gas Metal Arc Welding, a common US term for the welding process known in Europe and UK as MIG (Metal Inert Gas) welding. See MIG for more information. Gas Tungsten Arc Welding, a common US term, also known as TIG (Tungsten Inert Gas welding). See TIG for more information.
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