About this Abstract |
| Meeting |
TMS Specialty Congress 2026
|
| Symposium
|
4th World Congress on High Entropy Alloys (HEA 2026)
|
| Presentation Title |
Effect of Al Content on the Microstructure and Mechanical Behaviour of (CrFeNiCu)100-xAlx (x = 0 – 15 at.%) High Entropy Alloys |
| Author(s) |
Dilshodbek Bakhtiyarovich Yusupov, Hae Jin Park, Sung Hwan Hong, HyooSoo Lee, JinKyu Lee, Taekjib Choi, Ki Buem 17 and ISMANAM 27 Organising Committee Faculty of Materials Science and Engineering Kim |
| On-Site Speaker (Planned) |
Dilshodbek Bakhtiyarovich Yusupov |
| Abstract Scope |
In this study, (CrFeNiCu)100-xAlx HEAs (x = 0 – 15 at.%) were developed by introducing Al as a minor alloying element into the quaternary CrFeNiCu system. Comprehensive microstructural characterization demonstrated that Al additions exceeding 7 at.% promoted micro-to-nanoscale structural transformations. The minor Al additions below 5 at.% exhibited influence on the microstructure, which remained predominantly composed of the CrFeNi-rich FCC1 and Cu-rich FCC2 phases. HEAs with Al contents exceeding 7 at.% underwent notable microstructural transitions, evolving from a dual-phase FCC1/FCC2 structure to a multiphase FCC1/FCC2/BCC configuration. The primary BCC dendrites further exhibited nanoscale phase separation into A2/B2 structures, while L12 nanoprecipitates formed within the FCC matrix. The BCC phase fraction increased with Al content, leading to a substantial enhancement in yield strength (from 291 MPa to 1366 MPa). Although the higher BCC fraction reduced ductility from above 45% to 16.02%, this level of plasticity is considered acceptable for engineering applications. |
| Proceedings Inclusion? |
Undecided |