|About this Abstract
||2018 TMS Annual Meeting & Exhibition
||High Entropy Alloys VI
||Strengthening of an High Entropy Alloys Using Nanotwinned Grains
||Bin Gan, William Yi Wang, Yiguang Wang, Jeffrey M. Wheeler
|On-Site Speaker (Planned)
Traditionally, alloy design approaches have relied heavily on empirical methods via tuning the alloying additions in the base metals to achieve optimized properties. Recently, a novel alloy design approach consisting of mixing of multiple elements in an equimolar composition is proposed to form ‘high-entropy alloys’, which opens up new avenues for frontier research. This work demonstrates that enhancements of strength and ductility could be realized by applying dynamic plastic deformation (DPD) to cylindrical samples, followed by tuned thermal annealing history. The origin of this phenomenon is elucidated by microstructural characterization tools. It is shown that the sequential DPD and thermal annealing lead to the observed nanotwinned grains embedded in recrystallized regions and give rise to the simultaneously increase of strength and ductility. DPD may constitute a viable strategy to tune the mechanical performance and, in particular, to significantly increase strength without ductility trade off in high entropy alloys.
||Planned: Supplemental Proceedings volume