| About this Abstract |
| Meeting |
2025 TMS Annual Meeting & Exhibition
|
| Symposium
|
Advances in Multi-Principal Element Alloys IV: Mechanical Behavior
|
| Presentation Title |
Significant Improvement of Strain Hardening Through Massive Coherent Boundaries in Nano-Lamellar Structured Complex-Concentrated Alloys |
| Author(s) |
Tae Jin Jang, You Na Lee, Ju-Hyun Baek, Sang-Ho Oh, Yeon Taek Choi, Byeong-Joo Lee, Hyoung Seop Kim, Alireza Zargaran, Seok Su Sohn |
| On-Site Speaker (Planned) |
Tae Jin Jang |
| Abstract Scope |
Ultra-fine-grained CoNiMo alloys with various Mo content were fabricated through high-pressure torsion followed by short-time annealing. The alloys exhibit complex lamellar structures within the ultra-fined grain, characterized by high densities of coherent boundaries between face-centered cubic (FCC) and hexagonal close-packed (HCP) plates. The increase of Mo content leads to the proliferation of the volume fraction and density of HCP layers, resulting in the increased coherent boundary density. This microstructural evolution contributed to remarkable improvements in strain-hardening rate, reaching a maximum tensile strength of 1681 MPa and a uniform elongation of 11.9%. The enhanced strain-hardening behavior was attributed to the dislocation storage capability of the complex lamellar structure and heterogeneous deformation between the FCC and HCP layers. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
High-Entropy Alloys, Mechanical Properties, |