| About this Abstract |
| Meeting |
2022 TMS Annual Meeting & Exhibition
|
| Symposium
|
Advances in Multi-Principal Elements Alloys X: Alloy Development and Properties
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| Presentation Title |
Exploring Passivity of Multiple Principal Element Alloys |
| Author(s) |
David Alan Shifler |
| On-Site Speaker (Planned) |
David Alan Shifler |
| Abstract Scope |
The major factor controlling the corrosion of metals and alloys is the nature of the passive film in its environment. Ionic conductivity, electronic conductivity, surface reactivity or a combination of these three control the kinetics of passive film formation in traditional alloys with Al, Cr, Si, Ti, or Ta. TP Hoar suggested that superior passive films were the result of the formation of a non-crystalline film with short range order with bond flexibility.
Multiple principal element alloys (MPEAs) opens new compositional spaces leading to millions of unexplored alloy possibilities. Rather than a primary element controlling passivity, how does a mixture of elements provide a basis for a passive film to form? How do these alloy configurational differences influence properties and behavior, and what variables control passivity? This requires establishment of new theories to explain and predict surface passivity of MPEAs. This promises to activate data-driven studies in MPEAs.
|
| Proceedings Inclusion? |
Planned: |
| Keywords |
High-Entropy Alloys, Surface Modification and Coatings, Other |