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A Novel Nb-Based Eutectic Superalloy with Exceptional Ultrahigh-Temperature Mechanical Properties
Ayeman M. Nahin, Alfredo Navarrete, Xiaokun Yang +2
Refractory alloys operating above 1300 °C, beyond the limit of Ni-based superalloys, must balance high-temperature strength, thermal stability, low density, low cost, and room-temp…
A Low-Cost, Strong, and Ductile Single-Phase Nb-Based Refractory Complex Concentrated Alloy
Ayeman M. Nahin, Jacob Pustelnik, Jessica Dong +2
The development of structural materials capable of sustained operation above 1200 °C is critical for next-generation energy and aerospace systems; however, Ni-based superalloys are…
Enhanced Elevated-Temperature Strength in Refractory Complex Concentrated Alloys via Temperature-Induced Transition from Screw-to-Edge Dislocation Control
Tamanna Zakia, Ayeman Nahin, Dunji Yu +8
Refractory complex concentrated alloys (RCCAs) show promise for high-temperature applications but often lose strength due to screw-dislocation-controlled plasticity. We demonstrate…
Mechanistic Transition from Screw to Edge Dislocation Glide Enhances High-Temperature Strength in Refractory Complex Concentrated Alloys
Tamanna Zakia, Ayeman Nahin, Dunji Yu +8
The strength of body-centered cubic materials is traditionally known to be governed by screw dislocations. However, recent findings reveal that in certain refractory complex concen…