|About this Abstract
||2016 TMS Annual Meeting & Exhibition
||High Entropy Alloys IV
||On the Microstructural Stability of Nanocrystalline HEA Thin Films and Its Effect on Mechanical Properties
||Jeff Wheeler, Ralph Spolenak
|On-Site Speaker (Planned)
Nanocrystalline metals typically combine high strength and decent ductility. However, the tendency of the microstructure to coarsen limits their applicabilities. This contribution will review mechanisms that limit grain growth by alloying due to pinning of grain boundaries by precipitates or solute drag as well as thermodynamically stabilizing them by a reduction of grain-boundary energy by segregation. The mechanisms are critically discussed by examples on high entropy alloys of both fcc and bcc structure as well as ion-irradiated Cu thin films, Au-Pt, W-Cu, Ta-Cu, W-Ni, as model systems for comparison. In conclusion the effect on mechanical properties is illustrated.
||Planned: A print-only volume