Effect of Nb Addition on Microstructure and Thermal and Mechanical Properties of Fe-Co-Ni-Cu-Cr Multiprincipal-Element (High-Entropy) Alloys in As-Cast and Heat-Treated State

A Review of the Serrated-Flow Phenomenon and Its Role in the Deformation Behavior of High-Entropy Alloys

“…In other studies [194,195], the lack of observed serrations during mechanical testing of FeCrCoNiMnV and FeNiCoCuV HEAs indicates that the presence of secondary phase precipitates within the solid solution grains may be required for the serrated flow to occur. However, another investigation on an FeCoNiCuCr HEA found that serrations did not occur, even though there were intermetallic compound precipitates present in the matrix [196].…”

The Study of Structural Changes in Homogenized High-Entropy Alloys

“…The addition of alloying elements leads either to solid solution strengthening of the initial matrix or to the precipitation of dispersion strengthened phases and intermetallics [9,11]. The phase composition of HEAs is predicted by constructing multicomponent phase diagrams using computational methods [12,13].…”

“…As a result, they are more prone to the formation of substitutional solid solutions with a simple lattice characteristic of pure metals (fcc or bcc). At the same time, the use of simple approaches for cal-culating the entropy of mixing can yield inaccurate results for multicomponent alloys [12].…”

Structural Characterization of High Entropy Alloy (FeCoCrNiMn) Synthesized by Mechanical Alloying

“…High entropy alloys (HEAs) which usually contain five or more elements with equal or near equal atomic ratio, was proposed recently at the start of this century [1][2]. Yeh defined HEAs as alloys of more than 5 main components with concentrations of 5 to 35 atomic % [3].…”