R. Vikram, K. Dash, Shanmukha Kiran Aramanda, S. Suwas
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Design of a nickel–cobalt based eutectic high entropy alloy (NiCo)1.7AlCrFe with hierarchical microstructural length scales
ABSTRACT A combined nickel–cobalt-based eutectic high entropy alloy (Ni-Co-based HEA) has been designed based on the valence electron concentration (VEC) value. The microstructure of the developed alloy consists of a face-centered cubic (FCC) and ordered cubic (B2) structure, which was validated using CALPHAD. The microstructure is hierarchical with length scales in micrometers (lamellar eutectic morphology) and nanometers (B2 length scale). B2 phase precipitation was observed in the supersaturated FCC primary phase. The orientation relationship (OR) between the phases exhibited a strong Kurdjimov-Sachs (KS) type OR, typical of FCC/BCC interface structures. This EHEA displayed good yield strength at room temperature and strain rate insensitivity in the 10−3–10−1 strain rate range. GRAPHICAL ABSTRACT
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The Editors of Philosophical Magazine consider for publication contributions describing original experimental and theoretical results, computational simulations and concepts relating to the structure and properties of condensed matter. The submission of papers on novel measurements, phases, phenomena, and new types of material is encouraged.
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