| Autor: |
Sur, Debashish, Holcombe, Emily F., Blades, William H., Anber, Elaf A., Foley, Daniel L., DeCost, Brian L., Liu, Jing, Hattrick-Simpers, Jason, Sieradzki, Karl, Joress, Howie, Scully, John R., Taheri, Mitra L. |
| Rok vydání: |
2023 |
| Předmět: |
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| DOI: |
10.48550/arxiv.2302.07988 |
| Popis: |
Compositionally complex alloys hold the promise of simultaneously attaining superior combinations of properties such as corrosion resistance, light-weighting, and strength. Achieving this goal is a challenge due in part to a large number of possible compositions and structures in the vast alloy design space. High throughput methods offer a path forward, but a strong connection between the synthesis of a given composition and structure with its properties has not been fully realized to date. Here we present the rapid identification of light weight highly corrosion-resistant alloys based on combinations of Al and Cr in a Cantor-like base alloy (Al-Co-Cr-Fe-Ni). Previously unstudied alloy stoichiometries were identified using a combination of high throughput experimental screening coupled with key metallurgical and electrochemical corrosion tests, identifying alloys with excellent passivation behavior. Importantly, the electrochemical impedance modulus of the exposure-modified, air-formed film at the corrosion potential was found as an accurate non-destructive predictor of corrosion and passivation characteristics. Multi-element EXAFS analyses connected more ordered type chemical short range order in the Ni-Al 1st nn shell to poorer corrosion. This report underscores the utility of high throughput exploration of compositionally complex alloys for the identification and rapid screening of vast stoichiometric space. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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