| About this Abstract |
| Meeting |
2020 TMS Annual Meeting & Exhibition
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| Symposium
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Microstructural Template Consisting of a Face-Centered Cubic Matrix with Ordered Precipitates: Microstructural Evolution and Properties
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| Presentation Title |
Elevated Temperature Microstructure Evolution and Properties of an Equiatomic CrCoNi Superalloy Containing Al,Ti |
| Author(s) |
Connor E. Slone, Easo P. George, Michael J. Mills |
| On-Site Speaker (Planned) |
Michael J. Mills |
| Abstract Scope |
A new medium-entropy superalloy was produced based on the compositions of equiatomic CrCoNi and Ni-base superalloy Inconel 740H. Initial alloy design was performed using Thermo-Calc. The aging response and microstructural stability were assessed following heat treatment at temperatures between 600 - 900°C and durations up to 100 h. Aging from a fully recrystallized state resulted in negligible grain growth and produced ã’ and ó phases. The same phases were present after aging from a cold-rolled state, but partially recrystallized microstructures resulted in multi-modal size distributions and heterogeneous spatial arrangements. Room temperature hardness measurements were used to correlate aging conditions with quantitative precipitate measurements, mechanical properties, and deformation mechanisms. Of particular interest is the contribution of twinning to deformation of this superalloy in comparison to that exhibited by the equiatomic NiCoCr solid solution alloy. |
| Proceedings Inclusion? |
Planned: Supplemental Proceedings volume |