Corrosion and Thermal Stability of CrMnFeNi High Entropy Alloy in Molten FLiBe Salt

Elbakhshwan, Mohamed; Doniger, William; Falconer, Cody; Moorehead, Michael; Parkin, Calvin; Zhang, Chuan; Sridharan, Kumar; Couet, Adrien

doi:10.1038/s41598-019-55653-2

Title: Corrosion and Thermal Stability of CrMnFeNi High Entropy Alloy in Molten FLiBe Salt

Journal Article · 11 December 2019 · Scientific Reports

DOI: https://doi.org/10.1038/s41598-019-55653-2 · OSTI ID:1624517

Elbakhshwan, Mohamed ^[1]; Doniger, William ^[2]; Falconer, Cody ^[2]; Moorehead, Michael ^[2]; Parkin, Calvin ^[2]; Zhang, Chuan ^[3]; Sridharan, Kumar ^[2]; Couet, Adrien ^[2]

Univ. of Wisconsin, Madison, WI (United States); DOE/OSTI
Univ. of Wisconsin, Madison, WI (United States)
Computherm Inc, Middleton, WI (United States)

The corrosion behavior of the FCC Cr₁₈Mn₂₇Fe_27.5Ni_27.5 high entropy alloy (HEA) after exposure to molten FLiBe salt at 700 °C for 1000 hours, has been investigated. Results show that the HEA lost a higher mass compared to the reference 316 H stainless steel due to the dissolution of Mn into the molten salt. The loss of Mn from the alloy appeared to discourage the dissolution of Cr in the molten fluoride salts which is widely recognized as the mechanism of corrosion degradation. Thermal exposure at 700 °C for 1000 hours also led to the precipitation of an additional BCC phase Cr₆₇Fe₁₃Mn_18.5Ni_1.5, which was confirmed by CALPHAD predictions.

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Research Organization:: Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States); Texas A & M Univ., College Station, TX (United States). Texas A & M Engineering Experiment Station; Univ. of Wisconsin, Madison, WI (United States)

Sponsoring Organization:: National Science Foundation (NSF); USDOE Office of Nuclear Energy (NE), Nuclear Energy University Program (NEUP)

Grant/Contract Number:: NE0008285; NE0008651; NE0008678; NE0008803

OSTI ID:: 1624517

Journal Information:: Scientific Reports, Journal Name: Scientific Reports Journal Issue: 1 Vol. 9; ISSN 2045-2322

Publisher:: Nature Publishing GroupCopyright Statement

Country of Publication:: United States

Language:: English

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