About this Abstract |
Meeting |
MS&T21: Materials Science & Technology
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Symposium
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High Entropy Materials: Concentrated Solid Solutions, Intermetallics, Ceramics, Functional Materials and Beyond II
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Presentation Title |
Stress-corrosion of Al0.1CoCrFeNi High Entropy Alloy in a Molten Eutectic Salt |
Author(s) |
Xinyi Wang, Madison Heather McGrann, James C. Earthman |
On-Site Speaker (Planned) |
James C. Earthman |
Abstract Scope |
Molten salt corrosion of Al0.1CoCrFeNi HEA samples at 750°C under biaxial tension was investigated. The surfaces of samples were subjected to as much as 70 MPa biaxial tension and molten Na2SO4-NaCl simultaneously using an inverted disc-bend configuration. The resulting structure of the exposed surface and cross-section were examined using scanning electron microscopy (SEM) and elemental composition maps and profiles were determined using energy dispersive spectroscopy (EDS). The results indicate that formation of relatively large pores, production of a Cr-depleted reaction layer, and dissolution of external oxide films occurred for samples under biaxial tension that were not observed for samples that were unloaded. In sum, the ability for passive oxide films to form on the present alloy under these conditions appears to be severly limited by the application of a tensile stress. Based on these findings, directions for future work are suggested. |