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@BOOK{Chaouadi:811301,
author = {Chaouadi, Rachid},
title = {{N}eutron-{I}rradiation + {H}elium {H}ardening $\&$
{E}mbrittlement {M}odeling of $9\%{C}r-{S}teels$ in an
{E}ngineering {P}erspective ({HELENA})},
volume = {20},
address = {Jülich},
publisher = {Forschungszentrum Jülich GmbH Zentralbibliothek, Verlag},
reportid = {FZJ-2016-03796},
isbn = {978-3-89336-545-6},
series = {Schriften des Forschungszentrums Jülich / Reihe Energie
$\&$ Umwelt},
pages = {XIII, 138 S. : graph. Darst.},
year = {2008},
abstract = {This report provides a physically–based engineering model
to estimate the radiationhardening of $9\%Cr–steels$ under
both displacement damage (dpa) and helium. The modelis
essentially based on the dispersed barrier hardening theory
and the dynamic re–solutionof helium under displacement
cascades. However, a number of assumptions
andsimplifications were considered to obtain a simple
description of irradiation hardeningand embrittlement
primarily relying on the available experimental data. As a
result, twocomponents were basically identified, the dpa
component that can be associated withblack dots and small
loops and the He–component accounting for helium bubbles.
Thedpa component is strongly dependent on the irradiation
temperature and its dependencelaw was based on a
first–order annealing kinetics. The damage accumulation
law wasalso modified to take saturation into account.
Finally, the global kinetics of the damageaccumulation kept
defined, its amplitude is fitted to one experimental
condition. Themodel was rationalized on an experimental
database that mainly consists of $~9\%Cr–steels$
irradiated in the technologically important temperature
range of 50 to 600°C up to50 dpa and with a He-content up
to ~5000 appm, including neutron and proton irradiationas
well as implantation. The test temperature effect is taken
into account through anormalization procedure based on the
change of the Young's modulus and the anelasticdeformation
that occurs at high temperature. Finally, the
hardening–to–embrittlementcorrelation is obtained using
the load diagram approach.Despite the large experimental
scatter, inherent to the variety of the materials
andirradiation as well as testing conditions, the obtained
results are very promising.Improvement of the model
performance is still possible by including
He–hardeningsaturation and high temperature softening but
unfortunately, at this stage, a number ofconflicting
experimental data reported in literature should first be
clarified.},
keywords = {Chromstahl (gnd) / Neutronenstrahl (gnd) / Härten (gnd)},
cin = {IEF-2 / IEK-2},
ddc = {621.48332},
cid = {I:(DE-Juel1)VDB810 / I:(DE-Juel1)IEK-2-20101013},
pnm = {899 - ohne Topic (POF3-899)},
pid = {G:(DE-HGF)POF3-899},
typ = {PUB:(DE-HGF)3},
url = {https://juser.fz-juelich.de/record/811301},
}