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AlCoCrCuFeSiTi high-entropy alloy and preparation method thereof
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A high-entropy alloy and condition technology, applied in the field of high-entropy alloy and its preparation, can solve the problem of low hardness, achieve high yield strength and fracture strength, wide application, and excellent mechanical properties.
Active Publication Date: 2014-12-03
HARBIN INST OF TECH
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[0005] The purpose of the present invention is to solve the problem that existing high-entropy alloys have lower hardness than high-speed steel, and provide a kind of AlCoCrCuFeSiTi high-entropy alloy and its preparation method
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specific Embodiment approach 1
[0028] Embodiment 1: This embodiment is an AlCoCrCuFeSiTi high-entropy alloy composed of Al, Co, Cr, Cu, Fe, Si and Ti elements; the molar ratio of any two elements in the described AlCoCrCuFeSiTi high-entropy alloy is 1 :1.
[0029] The advantages of this embodiment: the AlCoCrCuFeSiTi high-entropy alloy prepared in this embodiment has excellent mechanical properties. The high-entropy alloy has a simple body-centered cubic structure and a face-centered cubic structure, and has very high yield strength and fracture strength. The yield strength is 1384.6MPa, fracture strength of 1452.3MPa, hardness can reach HV935, which makes it meet the requirements of modern industry and cutting tool industry on the mechanical properties of materials, making high-entropy alloys widely used in the industrial field.
specific Embodiment approach 2
[0030] Specific embodiment two: This embodiment is a preparation method of AlCoCrCuFeSiTi high-entropy alloy, which is specifically completed according to the following steps:
[0031]1. Ultrasonic treatment: put Al material, Co material, Cr material, Cu material, Fe material, Si material and Ti material in a container, then add acetone solution, and ultrasonically clean for 20-30 minutes to remove oil and impurities attached to the surface. Obtain the Al material, Co material, Cr material, Cu material, Fe material, Si material and Ti material after impurity removal; Then the Al material, Co material, Cr material, Cu material, Fe material, Si material and Put the Ti material in a container, add absolute ethanol and ultrasonically clean it for 20-30 minutes, and then put it in a drying oven for drying to obtain Al material, Co material, Cr material, Cu material, Fe material, and Si material after ultrasonic treatment. and Ti material;
[0032] 2. Weighing materials: Weigh the ...
specific Embodiment approach 3
[0036] Specific embodiment three: the difference between this embodiment and specific embodiment two is: the purity of the Al material, Co material, Cr material, Cu material, Fe material, Si material and Ti material described in step one are all ≥ 99.9% . Other steps are the same as in the second embodiment.
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Abstract
The invention discloses an AlCoCrCuFeSiTi high-entropy alloy and a preparation method thereof and relates to high-entropy alloy and a preparation method thereof, and aims at solving the problem that the hardness of the existing high-entropy alloy is lower than high-speed steel. The AlCoCrCuFeSiTi high-entropy alloy comprises elements Al, Co, Cr, Cu, Fe, Si and Ti. The preparation method comprises the following steps: 1 ultrasonic treatment; 2 weighing materials; and 3 smelting the high-entropy alloy, so as to obtain the AlCoCrCuFeSiTi high-entropy alloy. The AlCoCrCuFeSiTi high-entropy alloy prepared by the method has excellent mechanical property and also has a simple body-centered cubic structure and a face-centered cubic structure, the yield strength is 1384.6MPa, the breaking strength is 1452.3MPa, and the hardness can be up to HV935. The AlCoCrCuFeSiTi high-entropy alloy prepared by the method can be widely applied to the cutting tool industry.
Description
technical field [0001] The invention relates to a high-entropy alloy and a preparation method thereof. Background technique [0002] For a long time, the traditional alloy design method is to use one or two elements as the main components, and then add other elements to improve the structure and properties of the material, such as stainless steel, Ti-Al and other binary intermetallic compounds, aluminum alloys, titanium alloys, magnesium alloys, and bulk amorphous alloys. The traditional crystallographic theory believes that too many components in the alloy will lead to the formation of various intermetallic compounds and other complex structures, making the alloy lose its mechanical properties and making it difficult to obtain practical applications. With the development of modern industry, higher and higher performance requirements are put forward for materials: excellent mechanical properties, high temperature resistance, corrosion resistance, soft magnetic properties, e...
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