| About this Abstract |
| Meeting |
2020 TMS Annual Meeting & Exhibition
|
| Symposium
|
Progress towards Understanding the Synthesis and Behavior of Metals Far from Equilibrium: A SMD Symposium Honoring Enrique Lavernia on the Occasion of His 60th Birthday
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| Presentation Title |
Microstructure and Mechanical Properties of a Nanostructured High Entropy Alloy Processed via Cryogenic Rolling |
| Author(s) |
Yaojun Lin, Zhigang Yan, Fei Chen |
| On-Site Speaker (Planned) |
Yaojun Lin |
| Abstract Scope |
As a new class of materials, high entropy alloys (HEAs) are attracting considerable interest worldwide. In this talk, we report microstructure and tensile properties of a nanostructured equiatomic HEA Fe25Co25Cr25Ni25 produced via cryogenic rolling with a thickness reduction ratio of approximately 90% followed by annealing. Microstructures in as-rolled and annealed materials are studied using transmission electron microscopy (TEM), high resolution TEM and transmission Kikuchi diffraction. The microstructures including nano-sized grains, and nanoscale twinning and lamellar structure, as well as characteristic crystalline defect configurations, are presented. The mechanical properties of the HEA processed are measured via tensile testing. Our results reveal that heterogeneous microstructures can be attained during annealing, and that the nanostructured HEA exhibits an acceptable combination of strength and ductility. Based on the results in the present work, we discuss the future directions to increase ductility of, and to achieve excellent combination of strength and ductility in, nanostructured HEAs. |
| Proceedings Inclusion? |
Undecided |