Ordering-mediated local nano-clustering results in unusually large Hall-Petch strengthening coefficients in high entropy alloys
Abhinav Jagetia, Mohan Sai Kiran Kumar Yadav Nartu, Sriswaroop Dasari, Abhishek Sharma, Bharat Gwalani, Rajarshi Banerjee
Abstract
This article reports a dramatic increase in the grain boundary strengthening or Hall-Petch coefficient, K, by systematically investigating the effect of Al addition on tensile yield strength in CoFeNi and CoCrFeNi high entropy alloys (HEAs) or complex concentrated alloys (CCAs). Such a trend is attributed to the ordering mediated nano-clustering in Al containing HEA/CCAs.
Topics & Concepts
Materials scienceAtom probeGrain boundaryNano-Ultimate tensile strengthHigh entropy alloysGrain boundary strengtheningGrain sizeCondensed matter physicsMetallurgyComposite materialAlloyMicrostructurePhysicsHigh Entropy Alloys StudiesHigh-Temperature Coating BehaviorsAdvanced Materials Characterization Techniques