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 |
How Can We Tune the Short-range Order (SRO) in Multi-principal Element Alloys (MPEA)s? |
Author(s) |
Ying Han, Hangman Chen, Yongwen Sun, Jian Liu, Bijun Xie, Zhiyu Zhang, Meng Li, Judith Yang, Wen Chen, Penghui Cao, Yang Yang |
On-Site Speaker (Planned) |
Yongwen Sun |
Abstract Scope |
Multi-Principal Element Alloys (MPEAs), comprising multiple elements in near-equal proportions, exhibit unique properties and recently observed chemically short-range order (SRO). While SRO is believed to influence MPEAs' properties, fine-tuning it remains challenging. In this study, we developed a quantitative electron microscopy technique to evaluate the relative extent of SRO in specimens. Our exploration of the effect thermal treatment on SRO revealed that SRO is ubiquitous in several CoNi-based MPEAs, even in those produced with an ultra-rapid cooling rate of 107 K/s. Subsequent molecular dynamics (MD) simulations illuminated the atomic mechanism behind SRO formation in rapidly quenched samples. By synergistically combining experimental and modeling approaches, our findings provide further insights into the time-temperature transformation (TTT) diagram for SRO in CoNi-based MPEAs, paving the way for deeper comprehension and control of SRO in these MPEAs. |
Proceedings Inclusion? |
Planned: |
Keywords |
High-Entropy Alloys, Mechanical Properties, |