| Abstract Scope |
Refractory alloys are suited for high temperature applications. However, many refractory alloys, including refractory complex concentrated alloys (RCCAs), are difficult to thermomechanically process due to their limited low temperature ductility. While there are many possible origins for this behavior, one potential mechanism underpinning the limited ductility and propensity for intergranular fracture in refractory metals is the behavior of lattice dislocations as they impinge on grain boundaries. Here, we investigate dislocation-grain boundary and interstitial interactions in a promising RCCA, MoNbTi, at the macroscopic and micro-mechanical level via uniaxial compression, EBSD, and post-mortem transmission electron microscopy. Our results will be discussed relative to grain boundary mechanics and underlying deformation mechanisms. |