About this Abstract |
Meeting |
MS&T21: Materials Science & Technology
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Symposium
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High Entropy Materials: Concentrated Solid Solutions, Intermetallics, Ceramics, Functional Materials and Beyond II
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Presentation Title |
Now On-Demand Only - Determination of Fluctuations in Local Composition, Strain and Lattice Distortions in Multi-principal Component Alloys Using Advanced Transmission Electron Microscopy |
Author(s) |
Jian Min J. Zuo, Haw-Wen Hsiao, Yu-Tsun Shao, Qun Yang, Yang Hu |
On-Site Speaker (Planned) |
Jian Min J. Zuo |
Abstract Scope |
The concentrated solid solutions of multi-principal component alloys (MPEAs) present significant challenges for their characterization. While traditional characterization techniques have demonstrated their usefulness in determining bulk properties, however, the determination of local properties, such as fluctuations in local composition, short-range ordering, internal strain and stresses, and lattice distortions require sensitive high resolution probes as well as new methodologies in dealing with the complexities of randomness. Here we report on the combination of four-dimensional scanning transmission electron microscopy (4D-STEM) and high-resolution chemical analysis using STEM based X-ray energy-dispersive spectroscopy (EDS). Using this approach, we provide a detailed picture of compositional and structure fluctuations in MPEAs and discuss their role in strengthening and plasticity. |