Community Research and Development Information Service - CORDIS


Tungsten inert gas (TIG) and plasma welds were tested for their fatigue performance against other types of welded joints in steel (manual metal arc welds and other production arc welds), their welding processes making them subject to far less severe flaws. TIG and plasma welds showed a superior fatigue performance for transverse butt, cruciform and non-load carrying fillets, but the welding process had less influence on the performance of lap joints or edge attachments, and no influence on failure by fatigue cracking in the weld throat welded from the outside only. There were strong indications that where fatigue failure involved crack propagation from the weld toe, fatigue life increased with a decrease in plate thickness - the greatest potential of TIG and plasma welding is in the joining of thin sections. TIG and plasma welds also outperformed manual metal arc welds in weld toe geometry, with lower weld toe angles and larger weld toe radii.

Additional information

Authors: MOURA BRANCO C A, CEMUL, Lisbon (PL);MADDOX S J, The Welding Institute, Cambridge (GB)
Bibliographic Reference: EUR 18604 EN (1998) 158pp.
Availability: Available from OOPEC Sales agents
ISBN: ISBN 92-828-4997-X
Record Number: 199910335 / Last updated on: 1999-03-12
Original language: en
Available languages: en