首页|Concentration of “Mysterious Solute” in CoCrFeNi high entropy alloy
Concentration of “Mysterious Solute” in CoCrFeNi high entropy alloy
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NSTL
Elsevier
? 2022The appearance of serrated flow on stress-strain curves in single-phase high entropy alloys (HEAs) suggests that their lattices are arranged and behave differently than those in pure metals. In this study, a micromechanical model linking serration amplitude and solute concentration difference at the dislocation line was built to quantify the concentration of “mysterious solute” in HEAs. Using the model, the concentration of “mysterious solute” in a model HEA, CoCrFeNi, was determined to be ～34 at.%. Despite that certain facets of the physical nature of the solute remains to be further delved into, our present findings indeed suggest a quantitative distinction between the solvent and solute in single-phase HEAs. As opposed to commonly treating these concentrated solid solutions as an average “medium”, our work paves the avenue of separating out the solute and solvent, which is beneficial to unveiling many key questions in HEAs (e.g., obstruction of the solute to dislocation motion).
High entropy alloyMicromechanical modelSerrationSolute concentration
Yang Y.、Li Z.、Zhang W.、Wu Z.、Ma Y.、Xiong Q.、Li W.、Chen S.
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College of Materials Science and Engineering Hunan University
Key Laboratory for Light-weight Materials Nanjing Tech University
State Key Laboratory of Pulp and Paper Engineering South China University of Technology
Department of Materials Science and Engineering The University of Tennessee
Institute for Advanced Studies in Precision Materials Yantai University
NSTL
Elsevier
