About this Abstract |
Meeting |
2nd World Congress on High Entropy Alloys (HEA 2021)
|
Symposium
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2nd World Congress on High Entropy Alloys (HEA 2021)
|
Presentation Title |
Strengthening in a Model Alloy: Theory and Experiment in AuNi |
Author(s) |
Binglun Yin, Shankha Nag, Jens Freudenberger, William Curtin |
On-Site Speaker (Planned) |
William Curtin |
Abstract Scope |
Solute strengthening theory predicts AuNi alloy to be quite strong for Au alloys. The simplicity of solute-solute interactions and possible short-range order (SRO) make AuNi an attractive testbed for theory. AuNi alloys were thus fabricated, characterized, and tested. APT confirmed no segregation in samples annealed at 900 °C. We thus employed the theory, which was recently extended to include the effects of (i) solute-solute interactions in random alloys, and (ii) SRO caused by solute-solute interactions, to predict the strength. In random states, the strength prediction was in good agreement with experiments and suggested the strength is dominated by misfit volumes rather than solute-solute interactions. Then the SRO parameters were computed via Monte-Carlo and shown to be modest. The average strengthening due to SRO made some additional contribution to strength but the misfit contribution remained dominant. Overall, the general methodology and full theory validated here are broadly applicable to HEAs. |
Proceedings Inclusion? |
Undecided |