About this Abstract |
| Meeting |
2026 TMS Annual Meeting & Exhibition
|
| Symposium
|
Advances in Multi-Principal Element Alloys V: Mechanical Behavior
|
| Presentation Title |
Multiple precipitates strengthening in FeCoNiV+AlTi complex concentrated alloys with heterogeneous structures |
| Author(s) |
Suok-Min Na, Annika Jackson, Jin-Hyeong Yoo, Nicholas J. Jones |
| On-Site Speaker (Planned) |
Suok-Min Na |
| Abstract Scope |
Complex concentrated alloys (CCAs) have garnered tremendous interest for their unique properties with high ultimate tensile strength and ductility. However, the yield strength of these materials is generally low which limits the application potential of these novel materials. An effective way to raise a metal’s yield strength is to introduce Ni3Al-type L12 precipitates in the FCC matrix, as demonstrated the last several years in CoNiCr-AlTi and FeCoNiCr-AlTi CCAs. When replacing Cr with larger-sized V atoms in a FeCoNiCr alloy, the equiatomic FeCoNiV exhibits 1.1 GPa in tensile strength while maintaining good ductility of ~20% and ordered (Co,Ni)3V-type L12 structures, but the yield strength of ~380 MPa is still low. Here we investigate the strengthening effect of multiple Ni3Al-type precipitates in the FeCoNiV system by adding AlTi, compared with FeCoNiCr. These alloys underwent conventional hot-rolling and heat treatment processes. Their mechanical properties were evaluated through microhardness measurements and tensile tests. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
High-Entropy Alloys, Mechanical Properties, |