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

Abstract

The corrosion behavior of the FCC Cr 18Mn 27Fe 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 Cr 67Fe 13Mn 18.5Ni 1.5, which was confirmed by CALPHAD predictions.

Authors:
 [1];  [1];  [1];  [1];  [1];  [2];  [1];  [1]
  1. Univ. of Wisconsin, Madison, WI (United States)
  2. Computherm Inc, Middleton, WI (United States)
Publication Date:
Research Org.:
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 Org.:
USDOE Office of Nuclear Energy (NE), Nuclear Energy University Program (NEUP); National Science Foundation (NSF)
OSTI Identifier:
1624517
Grant/Contract Number:  
NE0008285; NE0008651; NE0008678; NE0008803
Resource Type:
Journal Article: Accepted Manuscript
Journal Name:
Scientific Reports
Additional Journal Information:
Journal Volume: 9; Journal Issue: 1; Journal ID: ISSN 2045-2322
Publisher:
Nature Publishing Group
Country of Publication:
United States
Language:
English
Subject:
Science & technology - other topics; Metals and alloys; Structural materials

Citation Formats

Elbakhshwan, Mohamed, Doniger, William, Falconer, Cody, Moorehead, Michael, Parkin, Calvin, Zhang, Chuan, Sridharan, Kumar, and Couet, Adrien. Corrosion and Thermal Stability of CrMnFeNi High Entropy Alloy in Molten FLiBe Salt. United States: N. p., 2019. Web. doi:10.1038/s41598-019-55653-2.
Elbakhshwan, Mohamed, Doniger, William, Falconer, Cody, Moorehead, Michael, Parkin, Calvin, Zhang, Chuan, Sridharan, Kumar, & Couet, Adrien. Corrosion and Thermal Stability of CrMnFeNi High Entropy Alloy in Molten FLiBe Salt. United States. https://doi.org/10.1038/s41598-019-55653-2
Elbakhshwan, Mohamed, Doniger, William, Falconer, Cody, Moorehead, Michael, Parkin, Calvin, Zhang, Chuan, Sridharan, Kumar, and Couet, Adrien. Thu . "Corrosion and Thermal Stability of CrMnFeNi High Entropy Alloy in Molten FLiBe Salt". United States. https://doi.org/10.1038/s41598-019-55653-2. https://www.osti.gov/servlets/purl/1624517.
@article{osti_1624517,
title = {Corrosion and Thermal Stability of CrMnFeNi High Entropy Alloy in Molten FLiBe Salt},
author = {Elbakhshwan, Mohamed and Doniger, William and Falconer, Cody and Moorehead, Michael and Parkin, Calvin and Zhang, Chuan and Sridharan, Kumar and Couet, Adrien},
abstractNote = {The corrosion behavior of the FCC Cr18Mn27Fe27.5Ni27.5 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 Cr67Fe13Mn18.5Ni1.5, which was confirmed by CALPHAD predictions.},
doi = {10.1038/s41598-019-55653-2},
url = {https://www.osti.gov/biblio/1624517}, journal = {Scientific Reports},
issn = {2045-2322},
number = 1,
volume = 9,
place = {United States},
year = {2019},
month = {12}
}

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Works referenced in this record:

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