Compatibility of FeCrAlMo in Flowing Pb-Li at 600°C to 700°C

Pint, Bruce; Jun, Jiheon; Cakmak, Ercan; Sprouster, David; Olynik, Nicholas; Snead, Lance

doi:10.1080/15361055.2021.1898305

Compatibility of FeCrAlMo in Flowing Pb-Li at 600°C to 700°C

Journal Article · Fri Aug 06 00:00:00 EDT 2021 · Fusion Science and Technology

DOI:https://doi.org/10.1080/15361055.2021.1898305· OSTI ID:1833981

^[1]; ^[1]; ^[1]; Sprouster, David ^[2]; Olynik, Nicholas ^[2]; Snead, Lance ^[2]

Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Stony Brook Univ., NY (United States)

A series of monometallic thermal convection loops (TCLs) has been conducted to determine the maximum temperature where FeCrAl alloys have compatibility with eutectic lead lithium (Pb-Li) for a dual-coolant fusion blanket. Pre-oxidizing commercial alloy APMT (Fe-21Cr-5Al-3Mo) for 2 h at 1000°C to form a surface α-Al₂O₃ layer was very effective in reducing the mass loss of specimens in the hot and cold legs of the most recent TCL that was operated for 1000 h with a peak temperature of 700°C. However, unlike previous experiments, the postexposure room temperature ductility of many of the APMT specimens was degraded to <10% total elongation, and many of the specimens at the highest temperature (>680°C) were severely damaged or were not recovered. Furthermore, wide-angle X-ray scattering found that the pre-formed α-Al₂O₃ scale transformed to a mixture of trigonal and tetragonal LiAlO₂. The overall results suggest that the maximum temperature for FeCrAl is limited to <700°C.

Research Organization:: Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)

Sponsoring Organization:: USDOE Office of Science (SC), Fusion Energy Sciences (FES)

Grant/Contract Number:: AC05-00OR22725

OSTI ID:: 1833981

Journal Information:: Fusion Science and Technology, Journal Name: Fusion Science and Technology Journal Issue: 7-8 Vol. 77; ISSN 1536-1055

Publisher:: American Nuclear SocietyCopyright Statement

Country of Publication:: United States

Language:: English

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