%0 Journal Article 
%A Chludzinski, Mariane
%A dos Santos, Rafael Eugenio
%A Ramminger Pissanti, Daniela
%A Cantelli Kroeff, Filipe
%A Mattei, Fabiano
%A Dalpiaz, Giovani
%A Piza Paes, Marcelo Torres
%T Full-scale friction welding system for pipeline steels
%D 2019
%@ 2238-7854
%U http://hdl.handle.net/10498/38755
%X A fully automatic friction welding system was specially developed for the girth friction welding of pipelines with a diameter of up to 400 mm. The friction welding methods were solid-state joining processes based on the generation of heat through the contact and rotation of an intermediate ring placed between two pipes ends. The thermomechanical process used in this non-fusion method generated different welding zones and microstructures. This resulted in the production of defect-free API 5L X46 welded pipes in less than 5 min. The microhardness profile of the welded joints showed an increase in the intermediate ring hardness. A fracture toughness test and fractographic analyses showed reduced values in the centre of the ring, which were associated with dimples nucleated at small inclusions.
%K Friction welding system
%K Pipeline girth welds
%K API 5L steel
%~ Universidad de Cádiz