About this Abstract |
Meeting |
2022 TMS Annual Meeting & Exhibition
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Symposium
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Advances in Multi-Principal Elements Alloys X: Structures and Modeling
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Presentation Title |
Chemical Randomness and Lattice Distortions in Multi-principal Elements Alloys: Advances in Characterization |
Author(s) |
Jian Min J. Zuo, Haw-Wen Hsiao, Yu-Tsun Shao, Yang Hu, Qun Yang |
On-Site Speaker (Planned) |
Jian Min J. Zuo |
Abstract Scope |
Multi-Principal Elements Alloys (MPEAs) are a new class of materials that are chemically concentrated in the phase spaces of largely unexplored. Since their discovery in 2004, these alloys have demonstrated remarkable chemical and physical properties that have attracted tremendous interest. However, their atomic structure and strengthening mechanisms are shrouded in mystery. The two fundamental aspects of MPEAs, namely chemical randomness and possible short range ordering and lattice distortions, have been suggested, but so far there are no conclusive experimental evidences. Here, we report on advances in analytical scanning transmission electron microscopy (STEM) that combines chemical analysis with the analysis of electron diffuse scattering using nanodiffraction. Using this approach, we determine lattice distortions in both MPEAs and high entropy alloys. The experimental evidences provide a comprehensive picture of nanoscopic structural and chemical fluctuations in these advanced alloys. |
Proceedings Inclusion? |
Planned: TMS Journal: Metallurgical and Materials Transactions |
Keywords |
High-Entropy Alloys, Characterization, Phase Transformations |