| About this Abstract |
| Meeting |
2025 TMS Annual Meeting & Exhibition
|
| Symposium
|
2025 Technical Division Student Poster Contest
|
| Presentation Title |
SPG-101: Effect of Local Lattice Distortion on Dislocation Based Plastic Deformation Characteristics of NbMoTaW-Ti Alloys |
| Author(s) |
Ali Ozalp, Eda Aydogan, Yunus Eren Kalay |
| On-Site Speaker (Planned) |
Ali Ozalp |
| Abstract Scope |
Refractory Metal-Based High-Entropy Alloys (RMPEAs) exhibit unique properties influenced by inherent factors such as local lattice distortion (LLD) and local chemical ordering (LCO). In this study, we systematically investigated the impact of LLD on dislocation-mediated plastic deformation by alloying the NbMoTaW base alloy with Ti. Compression test results reveal that Ti addition improves both the yield strength and fracture strain of the alloy. In our poster presentation, we will share transmission electron microscopy (TEM) analyses of homogenized NbMoTaW-Ti alloys. Using TEM, we quantified lattice distortion in undeformed samples and subsequently examined the edge and screw character of dislocations in deformed specimens. Our findings demonstrate that the proportion of dislocations with edge character increases as LLD increases. This study highlights the role of LLD in enhancing dislocation-mediated plasticity in RMPEAs, offering new insights into their deformation mechanisms and potential for improved mechanical performance. |
| Proceedings Inclusion? |
Undecided |
| Keywords |
Mechanical Properties, Characterization, High-Entropy Alloys |