About this Abstract |
Meeting |
2024 TMS Annual Meeting & Exhibition
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Symposium
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Local Ordering in Materials and Its Impacts on Mechanical Behaviors, Radiation Damage, and Corrosion
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Presentation Title |
Impact of Short-range Order on Planar Slips in High-entropy Alloys |
Author(s) |
K.J. Yin, H.W. Hsiao, Y. Hu, R. Feng, Peter K. Liaw, Y.-T. Shao, Jian Min J. Zuo |
On-Site Speaker (Planned) |
Jian Min J. Zuo |
Abstract Scope |
Single-phase face-centered-cubic (fcc) high-entropy alloys (HEAs) have been extensively studied for their high strength and great ductility, as well as the short-range ordering (SRO) effects. Their exceptional mechanical properties have been attributed to novel deformation mechanisms, such as the formation of stacking faults (SFs), nanotwins (NTs), and hexagonalclosedpack (hcp) phase. Deformation defects in general can be imaged by electron microscopy. However, the determination of short-range order and its effects on crystal deformation in HEAs are much more challenging because of their chemical complexities. Here, we report our study of SRO and its impact on mechanical deformation in CrCoNi and Al0.1CrCoNiFe using novel imaging methods based on the cepstral analysis of electron diffuse scattering in large diffraction datasets. This approach provides high sensitivity and high spatial resolution for the defect and SRO analysis. By comparing deformation microstructures in different types of SRO, we demonstrate the SRO effects on dislocation slips and planar defect formation, including the fcc to hcp transformation. |
Proceedings Inclusion? |
Planned: |