About this Abstract |
Meeting |
2023 TMS Annual Meeting & Exhibition
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Symposium
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Local Ordering in Materials and Its Impacts on Mechanical Behaviors, Radiation Damage, and Corrosion
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Presentation Title |
Chemical Short-range Order and Passivation of Binary FCC and BCC Single-Phase Alloys |
Author(s) |
Karl Sieradzki, Ian McCue, James Rondinelli, John Cavin |
On-Site Speaker (Planned) |
Karl Sieradzki |
Abstract Scope |
Single-phase binary alloys containing a sufficient quantity of a passivating component such as Cr, Si, Al or a Pt-group metal form excellent protective passive films as a result of the formation of a nanometer-thick mixed oxide film. The key scientific question addressed in this presentation is whether chemical short-range order can be used as a materials processing “knob” that can be tuned to enhance the corrosion resistance of binary alloys at fixed composition. Results from both experimental electrochemical analysis and computational modeling will be presented. A necessary requirement of the percolation passivation theory is the selective dissolution of the non-passivating alloy component. Since the degree of selective dissolution is unknown in the case of most refractory alloys, it currently remains unclear whether the theory will be applicable to this class of alloys.
Work supported by the National Science Foundation (NSF) program under grant numbers DMR- 2208848 and DMR-2208865. |
Proceedings Inclusion? |
Planned: |
Keywords |
Other, |