About this Abstract |
Meeting |
2023 TMS Annual Meeting & Exhibition
|
Symposium
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Advances in Powder and Ceramic Materials Science
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Presentation Title |
Toughening Mechanisms of Nano-oxide Dispersion Strengthening (NDS) on CoCuNiFeMn High Entropy Alloys with Nano-twin Fabricated via Powder Metallurgy |
Author(s) |
Hansung Lee, Ashutosh Sharma, Byungmin Ahn |
On-Site Speaker (Planned) |
Hansung Lee |
Abstract Scope |
High entropy alloys (HEAs) are multicomponent with five or more elements, exhibit simple solid solution due to a high configurational mixing entropy owing to constituent elements. Powder metallurgy is simple and scalable method fabricating HEAs that consists of mechanical alloying and densification. In this study, different weight fractions of WO<sub>3</sub> nanoparticles were added to the CoCuNiFeMn HEAs. The fabrication of the NDS-HEAs was carried out by high energy milling (300rpm, 30h) and spark plasma sintering (900℃, 8min). The microstructural evolution in NDS-HEAs was observed by XRD, FE-SEM, and TEM. The strengthening mechanisms of the nano-dispersed phases was assessed by microhardness, nanoindentation, and tensile test. Formation of nano-twins in the FCC matrix was enhanced with increasing fraction of nanoparticles. The amount of the WO<sub>3</sub> had an impact on the twin lamellae size, as well as 3wt.% of WO<sub>3</sub> nanoparticles can be optimized for the microstructural and mechanical performance of NDS-HEAs. |
Proceedings Inclusion? |
Planned: |
Keywords |
High-Entropy Alloys, Powder Materials, Mechanical Properties |