Citation:
Paul Colegrove, Chukwugozie Ikeagu, Adam Thistlethwaite, Stewart Williams, Tamas Nagy, Wojciech Suder, Axel Steuwer and Thilo Pirling. The welding process impact on residual stress and distortion. Science and Technology of Welding and Joining, 2009, Vol 14 (8), p.717-725
Abstract:
Residual stress and distortion continue to be important issues in shipbuilding
and are still subject to large amounts of research. This paper demonstrates how
the type of welding process influences the amount of distortion. Many shipyards
currently use submerged arc welding (SAW) as their welding process of choice. In
this manuscript we compare welds made by SAW with DC gas metal arc welding,
pulsed gas metal arc welding, Fronius Cold Metal Transfer (CMT), autogenous
laser and laser hybrid welding on butt welds in 4mm thick DH36 ship plate. Laser
and laser hybrid welding were found to produce the lowest distortion.
Nevertheless a considerable improvement can be achieved with the pulsed gas
metal arc welding and CMT processes. The paper seeks to understand the
relationship between heat input, fusion area, measured distortion and the
residual stress predicted from a simple numerical model, and the residual
stresses validated with experimental data.
