Light-mass and high-strength aluminum magnesium copper high-entropy alloy and preparation method thereof

Abstract

The invention relates to a light-mass and high-strength aluminum magnesium copper high-entropy alloy and a preparation method thereof. A component atom formula of the designed high-entropy alloy is AlxMgyCuzZnvSiw, wherein x+y+z+v+w=100, x=55-90, y=7-35, z=1-5, v=1-5, and w=0.3-1. A phase structure relating to the alloy uses face center cubic (FCC) solid solution as a main material. The inventionfurther provides the preparation method of the AlxMgyCuzZnvSiw high-entropy alloy; an alloy cast ingot is prepared by vacuum inductive smelting and direct casting; no pollution is generated in the preparation process; the energy consumption is low; the cost is low; and the preparation of the light-mass massive high-entropy alloy becomes possible.

Description

technical field [0001] The invention belongs to the field of metal material preparation, and in particular relates to a light-weight high-strength aluminum-magnesium-copper high-entropy alloy and a preparation method thereof. Background technique [0002] High-entropy alloys break through the traditional design concept and are alloyed according to equiatomic or nearly equiatomic ratios. They generally contain 5 to 13 elements, and cannot distinguish between solvent components and solute components in a solid solution, forming a disordered multi-component super solid solution. The high entropy effect effectively inhibits the precipitation of intermetallic compounds, reduces the alloy brittleness caused by multi-component alloys, and forms a phase structure dominated by solid solutions. [0003] Existing studies have found that the unique solid solution structure of high-entropy alloys often makes them have some excellent properties that cannot be compared with traditional all...

AI Technical Summary

Problems solved by technology

The special working conditions of aerospace materials require the material to have high specific strength, that is, the material is not only required to have high strength but also low density, but the transition metal elements often have a large density, which will inevitably lead to a high density of multi-component high-entropy alloys.

(2) High cost

Obviously, the raw materials of the existing high-entropy alloy components are often expensive, and each component has a high atomic percentage in the high-entropy alloy, which greatly increases the manufacturing cost of the alloy.

(3) High energy consumption, traditional high-entropy alloy components often have a higher melting point, which will inevitably lead to an increase in energy consumption for alloy smelting

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