About this Abstract |
Meeting |
2020 TMS Annual Meeting & Exhibition
|
Symposium
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High Entropy Alloys VIII
|
Presentation Title |
Microstructural Characterizations and Mechanical Properties of CrFeNiMn and NbTaTiV High Entropy Alloys |
Author(s) |
Mohamed S. Elbakhshwan, Michael Moorehead, Calvin Parkin, Bo-Shiuan Li, David Armstrong, Angus Wilkinson, Xuan Zhang, Chuan Zhang, Kumar Sridharan, Adrien Couet |
On-Site Speaker (Planned) |
Mohamed S. Elbakhshwan |
Abstract Scope |
High entropy alloys (HEAs) are composed of multi-principal elements in equal or near-equal atomic ratios in typically single-phase solid solution. Some HEAs have shown desirable properties for nuclear applications such as suppression to radiation induced segregation, low defect cluster sizes, and high swelling resistance. However, the properties of the HEAs have to be fully understood before their implementation in nuclear reactors. This study focuses on the microstructural characterizations, mechanical properties, and high temperature stability of single phase Cr18Mn27Fe27.5Ni27.5, Cr15Mn15Fe35Ni35, and NbTiVTa HEAs. High temperature mechanical properties were evaluated using tensile and four-point bending testing. The FCC Cr18Mn27Fe27.5Ni27.5 alloy experienced phase separation at 700ºC, while the Cr15Mn15Fe35Ni35 alloy remained stable. The BCC NbTaTiV HEA shows some ductility at room temperature which increased with heating up to 400ºC. Experimental analysis of phase evolution results have been combined with CALPHAD modeling to guide the search for new and improved HEAs for nuclear applications. |
Proceedings Inclusion? |
Planned: Supplemental Proceedings volume; Planned: Supplemental Proceedings volume |