|About this Abstract
||2018 TMS Annual Meeting & Exhibition
||Ultrafine-grained Materials X
||Anomalous Deformation Behavior of Thermally Stable Nanocrystalline Immiscible Alloys
||Kiran Solanki, Kris Darling
|On-Site Speaker (Planned)
The immiscible nanocrystalline Cu-Ta produced by cryogenic mechanical alloying demonstrate an extraordinary high-temperature stability of the microstructure and a high strength under both tension and compression. This talk highlights the stabilization and mechanical properties of the nanocrystalline Cu-Ta family of alloys, which in many cases demonstrate divergent behaviors, wherein the inferred long-established mechanisms governing no longer apply. For instance, contrary to the conventional believe and hitherto, we discover that a truly stabilized nanocrystalline material will not exhibit superplastic behavior even when subjected to temperature as high as 80% of its melting point. Finally, other remarkable properties of the fully stabilized nanocrystalline material will be reviewed, including the unusually small strain rate sensitivity (in dynamic regime), the limited strain hardening and extraordinary creep behavior.
||Planned: Supplemental Proceedings volume