A preparation method of multi-scale high-strength high-entropy alloy material for corrosive environment

Abstract

The invention discloses a method for preparing a multi-scale high-strength high-entropy alloy material used in a corrosive environment. Entropy alloy powder A and multi-scale high-entropy alloy powder B; 2. Mix multi-scale high-entropy alloy powder A and multi-scale high-entropy alloy powder B to obtain multi-level multi-scale high-entropy alloy powder; The scale high-entropy alloy powder is sintered to obtain a multi-scale high-strength high-entropy alloy material. In the present invention, the multi-scale high-entropy alloy powder with homogeneity and different average particle size is blended and then sintered to obtain a multi-scale high-strength high-entropy alloy material, which reduces the pollution of impurities in the preparation process and avoids the addition of heterogeneous phases. According to The required mechanical properties are designed, and the high-entropy alloy powders prepared by different ball milling processes are mixed in proportion to improve the strength of multi-scale high-strength high-entropy alloy materials while avoiding the reduction of corrosion resistance.

Description

technical field [0001] The invention belongs to the technical field of metal composite materials, and in particular relates to a preparation method of a multi-scale high-strength high-entropy alloy material used in a corrosive environment. Background technique [0002] The emergence of high-entropy alloys has broken the design concept of traditional alloys. Compared with traditional alloys with one or two components as the matrix, high-entropy alloys composed of four or five components have many excellent special properties, such as Radiation resistance, corrosion resistance, oxidation resistance, ultra-low temperature and high temperature mechanical properties, etc. As reported, the mechanical properties of CoCrFeNiMn alloys under low temperature liquid nitrogen conditions are more excellent than those at room temperature; AlCoCrFeNi 2.1 Eutectic high-entropy alloys have good fluidity, high-temperature oxidation resistance, high-temperature mechanical properties, and radia...

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Problems solved by technology

This method sinters multi-scale high-entropy alloy powders with homogeneous and different average particle sizes to obtain multi-scale high-strength high-entropy alloy materials, which solves the problem of long cycle time for mechanical alloying to prepare high-entropy alloy powders, and reduces impurities in the preparation process. The pollution of the powder is formed by ball milling the powder to form a multi-scale homogeneous powder to avoid the addition of heterogeneous phases. According to the mechanical properties required by the design, the high-entropy alloy powder prepared under different ball milling processes is mixed in proportion. After mixing evenly, Sintering densification, while improving the strength of the material, avoids reducing the corrosion resistance of the high-entropy alloy

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