Hydrogen effect on fracture toughness of pipeline steel welds, with in situ hydrogen charging

Chatzidouros, EV; Papazoglou, VJ; Tsiourva, TE; Pantelis, DI

dc.contributor.author	Chatzidouros, EV	en
dc.contributor.author	Papazoglou, VJ	en
dc.contributor.author	Tsiourva, TE	en
dc.contributor.author	Pantelis, DI	en
dc.date.accessioned	2014-03-01T01:35:50Z
dc.date.available	2014-03-01T01:35:50Z
dc.date.issued	2011	en
dc.identifier.issn	0360-3199	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/21208
dc.subject	Fracture toughness	en
dc.subject	Hydrogen charging	en
dc.subject	Hydrogen embrittlement	en
dc.subject	Microstructure	en
dc.subject	Pipeline steel	en
dc.subject	Welds	en
dc.subject.classification	Chemistry, Physical	en
dc.subject.classification	Energy & Fuels	en
dc.subject.classification	Environmental Sciences	en
dc.subject.classification	Physics, Atomic, Molecular & Chemical	en
dc.subject.other	Base metals	en
dc.subject.other	Ferrite-pearlite	en
dc.subject.other	Hydrogen charging	en
dc.subject.other	Hydrogen degradation	en
dc.subject.other	Hydrogen effect	en
dc.subject.other	In-situ	en
dc.subject.other	Monotonic loading	en
dc.subject.other	Pipeline crack	en
dc.subject.other	Pipeline steel	en
dc.subject.other	Small reduction	en
dc.subject.other	Soil solutions	en
dc.subject.other	Three point bending	en
dc.subject.other	Current density	en
dc.subject.other	Ductility	en
dc.subject.other	Electrolytic cells	en
dc.subject.other	Ferrites	en
dc.subject.other	Fracture	en
dc.subject.other	Heat affected zone	en
dc.subject.other	Hydrogen	en
dc.subject.other	Hydrogen embrittlement	en
dc.subject.other	Microstructure	en
dc.subject.other	Pipelines	en
dc.subject.other	Soil moisture	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 pipeline steel welds, with in situ hydrogen charging	en
heal.type	journalArticle	en
heal.identifier.primary	10.1016/j.ijhydene.2011.06.140	en
heal.identifier.secondary	http://dx.doi.org/10.1016/j.ijhydene.2011.06.140	en
heal.language	English	en
heal.publicationDate	2011	en
heal.abstract	The API 5L X70 and X52 pipeline steel weld fracture toughness parameters are measured in a hydrogen environment and compared to the ones in air. The hydrogen environment is created by in situ hydrogen charging, using as an electrolyte a simulated soil solution, with three current densities, namely 1, 5 and 10 mA/cm(2). A specially designed electrolytic cell mounted onto a three-point bending arrangement is used and hydrogen charging is performed during the monotonic loading of the specimens. Ductility is measured in terms of the J(0) integral. In all cases a slight change in toughness was measured in terms of K-Q. Reduction of ductility in the base metal is observed, which increases with increasing current density. A more complex phenomenon is observed in the heat affected zone metal, where a small reduction in ductility is observed for the two current densities (1 and 5 mA/cm(2)) and a larger reduction for the third case (10 mA/cm(2)). Regarding microstructure of tested X70 and X52 base and HAZ metal, it is observed that the hydrogen degradation effect is enhanced in banded ferrite-pearlite formations. The aforementioned procedure is used for calculating the fracture toughness parameters of a through-thickness pipeline crack. Copyright (C) 2011, Hydrogen Energy Publications, LLC. Published by Elsevier Ltd. All rights reserved.	en
heal.publisher	PERGAMON-ELSEVIER SCIENCE LTD	en
heal.journalName	International Journal of Hydrogen Energy	en
dc.identifier.doi	10.1016/j.ijhydene.2011.06.140	en
dc.identifier.isi	ISI:000295657300060	en
dc.identifier.volume	36	en
dc.identifier.issue	19	en
dc.identifier.spage	12626	en
dc.identifier.epage	12643	en