| About this Abstract |
| Meeting |
2025 TMS Annual Meeting & Exhibition
|
| Symposium
|
Advances in Multi-Principal Element Alloys IV: Mechanical Behavior
|
| Presentation Title |
Effect of Cr and Al on the Compressive Mechanical Properties of NbTiCrAl-Based Medium Entropy Alloys |
| Author(s) |
In-Chul Choi, Ji-Won Kim, Sang-Kyu Yoo |
| On-Site Speaker (Planned) |
In-Chul Choi |
| Abstract Scope |
To achieve relatively low density and high room-temperature ductility in BCC-structured medium-entropy alloys (MEAs), NbTiCrAl-based alloys were fabricated using a vacuum arc melting method. Especially, the influence of Cr and Al contents on compressive mechanical properties was investigated. All NbTiCrAl-based alloys constitute MEAs with a primary BCC-structured solid-solution phase. However, according to the content of Cr and Al, the short-range ordered B2 phase and the intermetallic Laves C14 phase can also coexist. Room temperature compression tests indicated that as Cr and Al content decreased, the yield strength decreased but fracture strain increased. The increased yield strength with higher Cr and Al content can be attributed to the strengthening effects stemming from larger atomic size differences, lattice mismatch, and the presence of the short-range ordered B2 phase and intermetallic compounds. In comparison to other medium/high-Entropy alloys, NbTiCrAl-based MEAs exhibit superior characteristics in terms of specific yield strength and elongation. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
High-Entropy Alloys, Mechanical Properties, Other |