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@ARTICLE{Duan:824690,
author = {Duan, R. and Jalowicka, A. and Unocic, K. and Pint, B. A.
and Huczkowski, P. and Chyrkin, A. and Grüner, D. and
Pillai, R. and Quadakkers, W. J.},
title = {{P}redicting {O}xidation-{L}imited {L}ifetime of
{T}hin-{W}alled {C}omponents of {N}i{C}r{W} {A}lloy 230},
journal = {Oxidation of metals},
volume = {87},
number = {1},
issn = {1573-4889},
address = {Dordrecht [u.a.]},
publisher = {Springer Science + Business Media B.V},
reportid = {FZJ-2016-07248},
pages = {11-38},
year = {2017},
abstract = {Using alloy 230 as an example, a generalized oxidation
lifetime model for chromia-forming Ni-base wrought alloys is
proposed, which captures the most important damaging
oxidation effects relevant for component design: wall
thickness loss, scale spallation, and the occurrence of
breakaway oxidation. For deriving input parameters and for
verification of the model approach, alloy 230 specimens with
different thicknesses were exposed for different times at
temperatures in the range 950–1050 °C in static air. The
studies focused on thin specimens (0.2–0.5 mm) to obtain
data for critical subscale depletion processes resulting in
breakaway oxidation within reasonably achievable test times
up to 3000 h. The oxidation kinetics and oxidation-induced
subscale microstructural changes were determined by
combining gravimetric data with results from scanning
electron microscopy with energy dispersive X-ray
spectroscopy. The modeling of the scale spallation and
re-formation was based on the NASA cyclic oxidation
spallation program, while a new model was developed to
describe accelerated oxidation occurring after longer
exposure times in the thinnest specimens. The calculated
oxidation data were combined with the reservoir model
equation, by means of which the relation between the
consumption and the remaining concentration of Cr in the
alloy was established as a function of temperature and
specimen thickness. Based on this approach, a generalized
lifetime diagram is proposed, in which wall thickness loss
is plotted as a function of time, initial specimen
thickness, and temperature. The time to reach a critical Cr
level at the scale/alloy interface of 10 $wt\%$ is also
indicated in the diagrams.},
cin = {IEK-2},
ddc = {540},
cid = {I:(DE-Juel1)IEK-2-20101013},
pnm = {111 - Efficient and Flexible Power Plants (POF3-111)},
pid = {G:(DE-HGF)POF3-111},
typ = {PUB:(DE-HGF)16},
UT = {WOS:000393748800002},
doi = {10.1007/s11085-016-9653-9},
url = {https://juser.fz-juelich.de/record/824690},
}