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@ARTICLE{Beck:838535,
author = {Beck, Tilmann and Kuhn, Bernd and Eckardt, T. and
Singheiser, L.},
title = {{M}icrostructure, {C}reep and {T}hermomechanical {F}atigue
of {N}ovel {S}olid {S}olution and {L}aves {P}hase
{S}trengthened {C}r2{O}3 and {A}l2{O}3 {F}orming {F}errites
for {C}ar {E}ngine {E}xhaust and {H}eat {E}xchanger
{S}ystems},
journal = {Transactions of the Indian Institute of Metals},
volume = {69},
number = {2},
issn = {0975-1645},
address = {[New Delhi]},
publisher = {Springer India},
reportid = {FZJ-2017-07117},
pages = {379 - 385},
year = {2016},
abstract = {Increasing efficiency of internal combustion engines by
downsizing leads to a rise in exhaust gas temperature up to
1000 °C accompanied with higher mechanical loading of
exhaust systems, approaching the limits of currently used
Cr2O3 forming ferrites. Similarly, the conditions in solid
oxide fuel cell (SOFC) heat exchanger systems exceed the
limits of commercial Al2O3 forming heat resistant ferrites
with respect to temperature and thermomechanical fatigue
(TMF) loading. Aim of the presented work was the development
of Cr2O3 and Al2O3 forming ferrites with improved mechanical
strength and TMF properties up to 900–1000 °C. Baseline
material was the Crofer® 22H alloy, which should be further
hardened by solid solution and Laves phase precipitates. The
paper gives an overview of the key results achieved at
Research Center Jülich on correlation between
microstructure evolution, deformation and lifetime in hot
tensile, creep and TMF tests. Increasing Laves phase
dissolution temperature elevates short time stability of
precipitates and long term stability of the grain structure
up to 950 °C. Furthermore, a lower Laves phase content of
the Al2O3 forming material could be compensated by dynamic
strain ageing via Al diffusion resulting in superior high
temperature strength, creep behavior and TMF life.},
cin = {IEK-2},
ddc = {620},
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:000368032700034},
doi = {10.1007/s12666-015-0747-x},
url = {https://juser.fz-juelich.de/record/838535},
}