High-strength low-elasticity modulus TiZrNbHf high-entropy alloy and preparation method thereof

Abstract

The invention relates to a high-strength low-elasticity modulus TiZrNbHf high-entropy alloy and a preparation method thereof; the component of the high-entropy alloy is TiaZrbNbcHfd, wherein a is not less than 20 and not more than 35, b is not less than 20 and not more than 35, c is not less than 20 and not more than 35, and d is not less than 20 and not more than 35. The preparation method of the alloy comprises the following steps: descaling metallurgy raw materials (Ti, Zr, Nb and Hf metals), precisely weighing and proportioning according to a mole ratio for smelting alloy; smelting the alloy by using a non-consumable vacuum arc furnace or a cold crucible suspension furnace, smelting the alloy in a water-cooling copper crucible, suction casting or pouring the alloy in a copper mold through vacuum suction casting or metal mold equipment so as to obtain high-entropy alloy rod or platy material. The high-entropy alloy has high strength, low Young modulus, and excellent structure property stability at a high temperature, the alloy element is non-toxic to human body or low in toxicity; and therefore, the high-entropy has good application prospect on biomedical and high-temperature components.

Description

technical field [0001] The invention relates to the field of metal materials and their preparation, and provides a TiZrNbHf high-entropy alloy with high strength and low elastic modulus and a preparation method thereof. The high-entropy alloy has good application prospects in biomedical and high-temperature components. Background technique [0002] High-entropy alloys refer to alloys containing four or more main elements, each of which accounts for a large atomic fraction but not more than 35%. Because the atomic fraction of none of the alloying elements exceeds 50%, the multi-element high disorder effect can be fully exerted. In the composition design, each component does not have to have the same atomic ratio, which can further increase the degree of freedom in the design of high-entropy alloys. The various elements in the multi-element alloy can be of the same type or different types, and trace elements can also be added To optimize the structure and properties of the al...

AI Technical Summary

Problems solved by technology

Among them, the most widely studied FeCoCrNiMn high-entropy alloy has a tensile plasticity of up to 60%, but its strength is only 200-500 MPa, while other high-entropy alloys with body-centered cubic structures and high-melting-point high-entropy alloys have no reports on tensile properties.

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