Title: Effect of Hydrogenation on Fracture Mode of a Reactor Pressure Vessel Steel
Authors: NYKYFORCHYN HTSYRULNYK OSTUDENT OTAYLOR Nigel
Citation: PHYSICOCHEMICAL MECHANICS OF MATERIALS vol. 45 no. 5 p. 5-16
Publisher: Karpenko Physico-Mechanical Institute
Publication Year: 2009
JRC N°: JRC56131
ISSN: 0430-6252
URI: http://publications.jrc.ec.europa.eu/repository/handle/JRC56131
Type: Articles in periodicals and books
Abstract: The conditions for hydrogen-induced intergranular fracture in an artificially embrittled, low-alloyed reactor pressure vessel were investigated using fracture toughness and stress corrosion cracking tests. The specimens were taken from two locations: the heat affected zone beneath the cladding and the base material directly below the heat-affected zone. A hydrogenating system allowed the tests to be carried out on both pre-hydrogenated specimens or with continuous hydrogenation during testing itself. Overall the results demonstrate a detrimental effect of hydrogen on sub-critical crack growth resistance of both materials. At 120¿C (close to the upper shelf) it led to a lower energy ductile fracture mode and isolated instances of transgranular fracture. At ambient temperature (in the ductile to brittle transition regime) some mixed intergranular and transgranular sub-critical crack growth was observed.
JRC Directorate:Energy, Transport and Climate

Files in This Item:
There are no files associated with this item.


Items in repository are protected by copyright, with all rights reserved, unless otherwise indicated.