About this Abstract |
Meeting |
2024 TMS Annual Meeting & Exhibition
|
Symposium
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Advances in Multi-Principal Element Alloys III: Mechanical Behavior
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Presentation Title |
Heterostructured High Entropy Alloys: A Perspective |
Author(s) |
Yuntian Zhu |
On-Site Speaker (Planned) |
Yuntian Zhu |
Abstract Scope |
High entropy alloys (HEAs) have been reported to have superior mechanical properties. It is desired to further improve their strength and to retain their high ductility. Recently, 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. 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. Indeed, heterostructured HEAs have been reported to possess outstanding mechanical properties. In this talk I’ll present a perspective on heterostructured HEAs. |
Proceedings Inclusion? |
Planned: |
Keywords |
High-Entropy Alloys, Mechanical Properties, Other |