Abstract: The present invention relates to a high-entropy alloy especially having excellent low-temperature tensile strength and elongation by means of having configured, through thermodynamic calculations, an alloy composition region having an FCC single-phase microstructure at 700° C. or higher, and enabling the FCC single-phase microstructure at room temperature and at an ultra-low temperature. The high-entropy alloy, according to the present invention, comprises: Co: 3-12 at %; Cr: 3-18 at %; Fe: 3-50 at %; Mn: 3-20 at %; Ni: 17-45 at %; V: 3-12 at %; and unavoidable impurities, wherein the ratio of the V content to the Ni content (V/Ni) is 0.5 or less, and the sum of the V content and the Co content is 22 at % or less.

Abstract: The present invention relates to a high-entropy alloy especially having excellent low-temperature tensile strength and elongation by means of having configured, through thermodynamic calculations, an alloy composition region having an FCC single-phase microstructure at 700° C. or higher, and enabling the FCC single-phase microstructure at room temperature and at an ultra-low temperature. The high-entropy alloy, according to the present invention, comprises: Cr: 3-18 at %; Fe: 3-60 at %; Mn: 3-40 at% ; Ni: 20-80 at %: 3-12 at %; and unavoidable impurities, wherein the ratio of the V content to the Ni content (V/Ni) is 0.5 or less.

Abstract: A method of making a metallic alloy, more particularly, a high-entropy alloy with a composite structure that exhibits high strength and good ductility, and is used as a component material in electromagnetic, chemical, shipbuilding, machinery, and other applications, and in extreme environments, and the like.

Abstract: A metallic alloy, more particularly, a high-entropy alloy with a composite structure exhibits high strength and good ductility, and is used as a component material in electromagnetic, chemical, shipbuilding, machinery, and other applications, and in extreme environments, and the like.

Abstract: A high entropy steel in which twinning and phase transformation are simultaneously performed, and a method of manufacturing the same, are provided.

Abstract: The present invention relates to a high-entropy alloy especially having excellent low-temperature tensile strength and elongation by means of having configured, through thermodynamic calculations, an alloy composition region having an FCC single-phase microstructure at 700° C. or higher, and enabling the FCC single-phase microstructure at room temperature and at an ultra-low temperature. The high-entropy alloy, according to the present invention, comprises: Co: 3-12 at %; Cr: 3-18 at %; Fe: 3-50 at %; Mn: 3-20 at %; Ni: 17-45 at %; V: 3-12 at %; and unavoidable impurities, wherein the ratio of the V content to the Ni content (V/Ni) is 0.5 or less, and the sum of the V content and the Co content is 22 at % or less.

Abstract: High-entropy alloy, particularly a precipitation hardening high entropy alloy, is provided as a component material used in electromagnetic, chemical, shipbuilding, mechanical, and other applications, a component material used in extreme environments requiring high strength and good corrosion resistance, and the like.

Abstract: A Cr filament-reinforced CrMnFeNiCu(Ag)-based high-entropy alloy and a method for manufacturing the same are provided. The high-entropy alloy, according to an exemplary embodiment in the present disclosure, includes, by at. %, Cr in an amount greater than 5% and less than 42%, Mn in an amount greater than 5% and less than 35%, Fe in an amount greater than 5% and less than 35%, Ni in an amount greater than 5% and less than 35%, and at least one of Cu in an amount greater than 3% and less than 35%, and Ag in an amount greater than 3% and less than 35%, and residual inevitable impurities. The high-entropy alloy has a dual phase in which a Cr or a Cr-rich phase is distributed within a matrix of the high-entropy alloy in filament or ribbon form.

Abstract: A metallic alloy, more particularly, a high-entropy alloy with a composite structure exhibits high strength and good ductility, and is used as a component material in electromagnetic, chemical, shipbuilding, machinery, and other applications, and in extreme environments, and the like.

Abstract: Disclosed are a hybrid copper alloy with high strength, high elastic modulus, high corrosion-resistance, wear resistance, and high conductivity and a method for producing the same. The hybrid copper alloy has a bi- or multi-layer structure in which (A) a copper alloy Cu (A) selected from the group consisting of Cu—Zn, Cu—Al, Cu—Ni—Zn, Cu—Ni—Si, Cu—Ni—Sn and Cu—Ni—Si—Sn is bonded to a copper alloy Cu (B) selected from the group consisting of Cu—Cr, Cu—Zr, Cu—Ag, Cu—Mg and Cu—Cr—Zr or molten alloys of a copper alloy Cu (A) and a copper alloy Cu (B) are cast in parallel such that a joint interface between these alloys is present. The hybrid copper alloy exhibits high strength, high elasticity, high corrosion resistance, abrasion resistance and high conductivity that cannot be obtained by a single copper alloy known to date.