About this Abstract |
| Meeting |
2026 TMS Annual Meeting & Exhibition
|
| Symposium
|
Advances in Multi-Principal Element Alloys V: Mechanical Behavior
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| Presentation Title |
Strength-Ductility Synergy in Single-Phase FCC Multi-Principal Element Alloys: Multifaceted Strengthening by Ti Addition |
| Author(s) |
Chenliang Chu, Shuhei Yoshida, Reza Gholizadeh, Zhiqiang Fu, Weiping Chen, Yan Chong, Wei Xiong, Xiaoxu Huang, Nobuhiro Tsuji |
| On-Site Speaker (Planned) |
Nobuhiro Tsuji |
| Abstract Scope |
Achieving high strength in single-phase alloys without sacrificing ductility at ambient-to-cryogenic temperatures remains challenging. Conventional strategies relying on extensive grain refinement often degrade strain-hardening and ductility. Here, we present a high-Ti addition strategy in multi-principal element alloys (MPEAs) that maintains a single-phase structure while significantly enhancing strength-ductility synergy. The Ti-added MPEA outperforms its Ti-free counterpart in strength and elongation at both 293 K and 77 K. The improvement originates from the multifaceted role of Ti in solid-solution strengthening and stacking fault energy reduction, promoting a shift from a simple tangled dislocation structure to a more complex structure involving planar dislocations, stacking faults, deformation twins, and Lomer-Cottrell locks. High-Ti addition also increases the Hall-Petch coefficient through Ti segregation at grain boundaries, enabling further strengthening from grain refinement. This work demonstrates an approach for designing single-phase MPEAs with synergistic strengthening mechanisms, offering enhanced strain-hardening and exceptional mechanical performance from room to cryogenic temperatures. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
High-Entropy Alloys, Mechanical Properties, Other |