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@ARTICLE{Qu:860511,
author = {Qu, D. and Gaganidze, E. and Vaßen, R. and Aktaa, J.},
title = {{D}etermination of interface toughness of functionally
graded tungsten/{EUROFER} multilayer at 550 °{C} by
analytical and experimental methods},
journal = {Engineering fracture mechanics},
volume = {202},
issn = {0013-7944},
address = {Kidlington},
publisher = {Elsevier Science},
reportid = {FZJ-2019-01247},
pages = {487 - 499},
year = {2018},
abstract = {As armor coating, functionally graded (FG) tungsten/EUROFER
multilayer was sprayed on EUROFER substrate for First Wall
application in fusion field. Interface toughness between FG
tungsten/EUROFER multilayer and EUROFER substrate was
studied innovatively by a simple method based on the beam
theory in this paper. To quantify interface toughness, the
energy release rate was assessed by performing three and
four-point bending tests on pre-cracked specimens at
550 °C and under high vacuum. The energy release rate
during propagating of interfacial crack was determined to be
258 J/m2 and 225 J/m2 analytically and experimentally
for samples with 3 and 5 layers as FG-layer, respectively,
which were calculated based on multi bending tests.
Cross-section and fracture microstructure show a vast of
plasticity in FG-layer, particularly in FG-layer with a
higher volume ratio of EUROFER. Interfacial fracture
microstructure indicates interface adhesion consists of
mechanical interlocking and metallurgical bonding.},
cin = {IEK-1},
ddc = {530},
cid = {I:(DE-Juel1)IEK-1-20101013},
pnm = {113 - Methods and Concepts for Material Development
(POF3-113)},
pid = {G:(DE-HGF)POF3-113},
typ = {PUB:(DE-HGF)16},
UT = {WOS:000449274300032},
doi = {10.1016/j.engfracmech.2018.09.016},
url = {https://juser.fz-juelich.de/record/860511},
}