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 |
Refractory High Entropy Alloys with Balanced Properties Tailored for Service Conditions |
Author(s) |
Andrew Detor, Scott Oppenheimer, James Ruud, Emily Cheng |
On-Site Speaker (Planned) |
Andrew Detor |
Abstract Scope |
Most commercial refractory alloys were designed with high temperature strength and manufacturability prioritized over oxidation resistance. This drives the need for complex and expensive coatings in aggressive service conditions. By lifting classic composition constraints through a high entropy alloying approach, it is possible to achieve improved balance-of-properties in refractory metals. Tailoring properties individually, as required for a specific application or as input for design trades, is also enabled. Here, we review recent work combining high throughput experimental screening, machine learning, and multi-objective optimization to explore a wide refractory alloy composition space. We demonstrate a materials informatics alloy selection process for extreme service conditions where oxidation resistance is prioritized alongside mechanical properties and manufacturability. Fundamental mechanisms driving competing properties are presented to clarify the compositional origin of tradeoffs. The general methods presented here can be applied to other applications and highlight the benefits of a materials informatics approach to alloy design. |