Hydrogen effect on fracture toughness of API 5l X70, X65 and X52 pipeline steel welds- An overview

Chatzidouros, EV; Papazoglou, VJ; Pantelis, DI

dc.contributor.author	Chatzidouros, EV	en
dc.contributor.author	Papazoglou, VJ	en
dc.contributor.author	Pantelis, DI	en
dc.date.accessioned	2014-03-01T02:53:18Z
dc.date.available	2014-03-01T02:53:18Z
dc.date.issued	2011	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/36227
dc.subject.other	Base metals	en
dc.subject.other	Fracture toughness tests	en
dc.subject.other	Hydrogen effect	en
dc.subject.other	J integral	en
dc.subject.other	Pipeline steel	en
dc.subject.other	Plastic work	en
dc.subject.other	Steel welds	en
dc.subject.other	Three generations	en
dc.subject.other	Three point bending	en
dc.subject.other	Welded steels	en
dc.subject.other	Arctic engineering	en
dc.subject.other	Bending tests	en
dc.subject.other	Defects	en
dc.subject.other	Fracture	en
dc.subject.other	Hydrogen	en
dc.subject.other	Microstructure	en
dc.subject.other	Offshore structures	en
dc.subject.other	Pipelines	en
dc.subject.other	Steel pipe	en
dc.subject.other	Welding	en
dc.subject.other	Welds	en
dc.subject.other	Fracture toughness	en
dc.title	Hydrogen effect on fracture toughness of API 5l X70, X65 and X52 pipeline steel welds- An overview	en
heal.type	conferenceItem	en
heal.identifier.primary	10.1115/OMAE2011-49348	en
heal.identifier.secondary	http://dx.doi.org/10.1115/OMAE2011-49348	en
heal.publicationDate	2011	en
heal.abstract	Steel welds representing three generations of pipeline steel were studied against hydrogen effect, using the fracture toughness parameter J integral which is a measure of the plastic work. The influence of hydrogen on the growth of a partial wall defect is studied and comparisons with the growth of the same defect in air are presented. The tests conducted were three-point bending fracture toughness tests, in air and in a hydrogen environment simulated by electrolysis. Reduction in J0 was observed in all pipeline steel grades as the current density increases, which was more pronounced in the base metal rather than in the heat affected zone. The different microstructures of the welded steels are observed and correlated to the reduction in plasticity. It is concluded that microstructure seems to be the decisive parameter for the selection of a pipeline steel for service in a hydrogen environment. Copyright © 2011 by ASME.	en
heal.journalName	Proceedings of the International Conference on Offshore Mechanics and Arctic Engineering - OMAE	en
dc.identifier.doi	10.1115/OMAE2011-49348	en
dc.identifier.volume	3	en
dc.identifier.spage	251	en
dc.identifier.epage	260	en