| About this Abstract |
| Meeting |
MS&T24: Materials Science & Technology
|
| Symposium
|
High Entropy Materials: Concentrated Solid Solutions, Intermetallics, Ceramics, Functional Materials and Beyond V
|
| Presentation Title |
Heterostructured High Entropy Alloys: An Overview |
| Author(s) |
Yuntian Zhu, Peijian Shi |
| On-Site Speaker (Planned) |
Yuntian Zhu |
| Abstract Scope |
Heterostructures are found to produce unprecedented strength and ductility that are considered impossible from our textbook knowledge and materials history. Structural heterostructured materials consist of heterogeneous zones with dramatic (>100%) variations in mechanical properties. The superior mechanical properties of heterosructured materials come from the pile-ups of geometrically necessary dislocations (GNDs), which produce hetero-deformation induced (HDI) strengthening and work hardening. High entropy alloys (HEAs) have been reported to have unique superior mechanical properties. It is desired to further improve their strength and to retain their high ductility to improve their potential for real commercial applications. HEAs have been reported to exhibit a unique dislocation behavior: planar dislocation slip, which is caused by their low stacking fault energy and local element clustering. This makes HEAs ideal form making heterostructured materials because planar slip promotes GND pile-up by hindering cross-slip. In this talk I’ll present an overview and my perspective on heterostructured HEAs. |