TY - JOUR
T1 - Design of alumina forming FeCrAl steels for lead or lead-bismuth cooled fast reactors
AU - Lim, Jun
AU - Hwang, Il Soon
AU - Kim, Ji Hyun
N1 - Funding Information:
The thermodynamic calculations using JMatPro were conducted in the Korea Institute of Material Science (KIMS). This work was financially supported by the Human Resources Development Program of Korea Institute of Energy Technology Evaluation and Planning (KETEP) funded by the Ministry of Knowledge Economy (MKE) and by the Korean Nuclear R&D program organized by the National Research Foundation (NRF) of Korea in support of the Ministry of Education, Science and Technology (MEST).
PY - 2013
Y1 - 2013
N2 - Iron-chromium-aluminum alloys containing 15-20 wt.% Cr and 4-6 wt.% Al have shown excellent corrosion resistance in the temperature range up to 600 °C or higher in liquid lead and lead-bismuth eutectic environments by the formation of protective Al2O3 layers. However, the higher Cr and Al concentrations in ferritic alloys could be problematic because of severe embrittlement in the manufacturing process as well as in service, caused by the formation of brittle phases. For this reason, efforts worldwide have so far mainly focused on the development of aluminizing surface treatments. However, aluminizing surface treatments have major disadvantages of cost, processing difficulties and reliability issues. In this study, a new FeCrAl alloy is proposed for structural materials in lead and lead-bismuth cooled nuclear applications. The alloy design relied on corrosion experiments in high temperature lead and lead-bismuth eutectic environments and computational thermodynamic calculations using the commercial software, JMatPro. The design of new alloys has focused on the optimization of Cr and Al levels for the formation of an external Al2O3 layer which can provide excellent oxidation and corrosion resistance in liquid lead alloys in the temperature range 300-600 °C while still retaining workable mechanical properties.
AB - Iron-chromium-aluminum alloys containing 15-20 wt.% Cr and 4-6 wt.% Al have shown excellent corrosion resistance in the temperature range up to 600 °C or higher in liquid lead and lead-bismuth eutectic environments by the formation of protective Al2O3 layers. However, the higher Cr and Al concentrations in ferritic alloys could be problematic because of severe embrittlement in the manufacturing process as well as in service, caused by the formation of brittle phases. For this reason, efforts worldwide have so far mainly focused on the development of aluminizing surface treatments. However, aluminizing surface treatments have major disadvantages of cost, processing difficulties and reliability issues. In this study, a new FeCrAl alloy is proposed for structural materials in lead and lead-bismuth cooled nuclear applications. The alloy design relied on corrosion experiments in high temperature lead and lead-bismuth eutectic environments and computational thermodynamic calculations using the commercial software, JMatPro. The design of new alloys has focused on the optimization of Cr and Al levels for the formation of an external Al2O3 layer which can provide excellent oxidation and corrosion resistance in liquid lead alloys in the temperature range 300-600 °C while still retaining workable mechanical properties.
KW - aluminum alloys
KW - Lead-bismuth coolant
KW - Fast Reactors
UR - http://www.scopus.com/inward/record.url?scp=84885172207&partnerID=8YFLogxK
U2 - 10.1016/j.jnucmat.2012.04.006
DO - 10.1016/j.jnucmat.2012.04.006
M3 - Article
AN - SCOPUS:84885172207
SN - 0022-3115
VL - 441
SP - 650
EP - 660
JO - Journal of Nuclear Materials
JF - Journal of Nuclear Materials
IS - 1-3
ER -