About this Abstract |
Meeting |
MS&T21: Materials Science & Technology
|
Symposium
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High Entropy Materials: Concentrated Solid Solutions, Intermetallics, Ceramics, Functional Materials and Beyond II
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Presentation Title |
Creep Performance of Various Single Phase FCC CoCrFeNi Family of High Entropy Alloys |
Author(s) |
Kyle Rozman, Martin Detrois, Paul Jablonski, Michael Gao, Jeffery Hawk |
On-Site Speaker (Planned) |
Michael Gao |
Abstract Scope |
With goals to develop alloys for the next generation of advanced ultra-supercritical power turbines, the National Energy Technology Laboratory (NETL) has produced a series of CoCrFeNi single phase FCC HEAs, with Mn or Mo variants. Further efforts include high entropy (HE) superalloys where matrix entropy is maximized. NETL has produced these alloys as fully wrought plates, originating from small scale 7-10 kg ingots. Such a methodology is scalable to large production methods using a combination of vacuum induction melting and electro-slag remelting. Full-size tensile and creep specimens were produced from these ingots and tested to failure in tension or creep. NETL has accumulated over 100,000 hours (combined) of creep rupture data on these HEAs. This presentation focus on the creep properties of these CoCrFeNi family of alloys, reporting and contrasting their performance with relevant structural alloys. |