Fatigue performance of tungsten inert gas (TIG) and plasma welds in thin sections
Established fatigue design rules for welded joints in steels have been based largely on data obtained from tests on manual metal arc (MMA) welds. The main objective of this research was to verify the theory that tungsten inert gas (TIG) and plasma welds display fatigue performance superior to other weld processes, particularly in the area of weld toes. Particular attention was paid to the joining of thin sections (less than 10mm) since there was expected to be increased fatigue strength with decrease in plate thickness. The research confirmed superior fatigue performance for a range of welded joints, some justifying a one class increase in Eurocode 3. The relation between decreased plate thickness and increased fatigue life was also confirmed. Examination of the weld toe geometries suggested that the larger weld toe radii produced by TIG and plasma welding was a significant indicator of increased fatigue life. Fatigue design guidance for TIG or plasma welding was provided from the research data.
Bibliographic Reference: EUR 18604 EN (1998)
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Record Number: 199910498 / Last updated on: 1999-03-26
Original language: en
Available languages: en