Quaternary high-entropy alloy containing nano-particle structure and preparation method of quaternary high-entropy alloy

Abstract

The invention provides a quaternary high-entropy alloy containing a nano-particle structure and a preparation method of the quaternary high-entropy alloy, and belongs to the technical field of high-entropy alloy materials. According to the quaternary high-entropy alloy containing the nano-particle structure and the preparation method of the quaternary high-entropy alloy, raw materials are sequentially placed from bottom to top according to the sequence of the melting points of the raw materials from low to high, then smelting is conducted, cooling is conducted, and the quaternary high-entropy alloy containing the nano-particle structure is obtained; the number of times of smelting is 3-6; the cooling mode after each time of smelting is water cooling; and the quaternary high-entropy alloy is an aluminum-chromium-iron-nickel quaternary high-entropy alloy. According to the quaternary high-entropy alloy containing the nano-particle structure and the preparation method of the quaternary high-entropy alloy, the melt cooling rate is increased in a water cooling mode, the cooling time is shortened, and element segregation is controlled, so that the quaternary high-entropy alloy has high compressive strength and good ductility; and the result of the embodiment shows that the aluminum-chromium-iron-nickel quaternary high-entropy alloy has the hardness of 247.76 HV, the compressive strength of 1807.01 MPa, the yield strength of 1205.08 MPa and the elongation of 16.21%.

Description

Technical field [0001] The present invention relates to the field of high entropy alloy material, and more particularly to a quadritical high entropy alloy containing a nanoparticle structure and a preparation method thereof. Background technique [0002] High entropy alloy is an alloy formed from a variety of equivalents or approximately equal metals, because high entropy alloys may have many ideal properties, so it is quite important in material science and engineering. The traditional five-dimensional high entropy alloy currently studied often uses high-cost elements such as cobalt, titanium, and has severely restricted the application and development of high entropy alloys. Therefore, there will be very important to prepare a high-quality structure and have a good mechanical properties. Since the five-yuan high entropy alloy has a lower liquidity compared to four yuan, the mixing enthalpy between the internal elements is relatively complicated, and the distribution of element...

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Problems solved by technology

Since the five-element high-entropy alloy has lower fluidity than the four-element, the mixing enthalpy between elements in the system is more complicated, and the distribution of elements is less affected by the mixing enthalpy between elements, so the traditional melting of five-element high-entropy alloys in The preparation process will not affect its structure, which can make the five-element high-entropy alloy have higher strength and good ductility; and there will always be two elements in the quaternary alloy system with the lowest mixing enthalpy, and the quaternary alloy itself There is a property of better fluidity, which can easily lead to the accumulation of elements in the system in pairs, resulting in element segregation, which greatly affects the mechanical properties of the quaternary high-entropy alloy, and brings great benefits to the process method of the quaternary high-entropy alloy. great challenge

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