| About this Abstract |
| Meeting |
3rd World Congress on High Entropy Alloys (HEA 2023)
|
| Symposium
|
HEA 2023
|
| Presentation Title |
Hard Zones and Superior Mechanical Properties Produced by Dense Nanoscale Recrystallization Twins in a Single-phase Heterostructured High-entropy Alloy |
| Author(s) |
Shu-Yi Tung, Ting-En Hsu, Yuntian Zhu, Ming-Hung Tsai |
| On-Site Speaker (Planned) |
Shu-Yi Tung |
| Abstract Scope |
Heterostructured high-entropy alloys (HSHEAs) integrate two innovative concepts in metallic materials that encompass alloy design and microstructural engineering. HSHEAs have demonstrated outstanding mechanical properties. However, the exploration of these materials remains challenging due to the intricate nature of their composition and microstructure. In this study, we introduced a heterostructure into a single-phase FCC HEA through cold rolling and partial recrystallization. This process resulted in an exceptionally high density of nanoscale recrystallization twins, leading to significant hardening and the formation of heterogeneous hard zones within the recrystallized regions. This tri-modal heterostructure induces secondary hetero-deformation-induced hardening, which sustains larger stable tensile plasticity, i.e. higher ductility. As a result, the alloy exhibits enhanced strength and ductility, yielding superior mechanical properties. The identification of the recrystallized hard zones is crucial for gaining a proper understanding of the hetero-zones in HEAs and provides valuable insights for the future design of HSHEAs. |
| Proceedings Inclusion? |
Planned: Metallurgical and Materials Transactions |