About this Abstract |
| Meeting |
2026 TMS Annual Meeting & Exhibition
|
| Symposium
|
Advances in Multi-Principal Element Alloys V: Mechanical Behavior
|
| Presentation Title |
Understanding Temperature Dependence of Yield Strength in Refractory Complex Concentrated Alloys |
| Author(s) |
Tamanna Zakia, Ayeman Nahin, Mason Kincheloe, Jacob Pustelnik, Michael Lau, Mingwei Zhang |
| On-Site Speaker (Planned) |
Tamanna Zakia |
| Abstract Scope |
To develop refractory complex concentrated alloys (RCCAs) for extreme-temperature applications, it is essential to understand the mechanisms governing plastic deformation at elevated temperatures. Yield strength in RCCAs typically decreases with increasing temperature, reaches a plateau at intermediate temperatures, and then declines further. Understanding the origin of this plateau is crucial for designing RCCAs with strength retention at elevated temperatures. Recent studies have shown that NbTaTiV exhibits a yield strength plateau beginning around 0.35 Tm and plastic deformation is governed by edge dislocation motion from room temperature up to 1173 K (∼0.55 Tm). This research further investigates the correlation between vanadium concentration and high-temperature mechanical behavior, particularly the role of vanadium in promoting a shift from screw to edge dislocation mechanisms. By determining the tensile yield strength of NbTaTiV alloys with varying vanadium concentration, this study aims to clarify how vanadium influences the dislocation mechanism and contributes to strength retention at elevated temperatures. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Mechanical Properties, |