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TiZrNbVMo[x] high entropy alloy and preparation method thereof

A high-entropy alloy and alloy technology, applied in the field of high-entropy alloy and its preparation, can solve the problems of loss of mechanical properties and difficult processing, and achieve the effects of good plastic deformation ability and high hardness

Active Publication Date: 2014-02-26
UNIV OF SCI & TECH BEIJING
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Problems solved by technology

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 it lose its mechanical properties and making it difficult for subsequent processing

Method used

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  • TiZrNbVMo[x] high entropy alloy and preparation method thereof
  • TiZrNbVMo[x] high entropy alloy and preparation method thereof
  • TiZrNbVMo[x] high entropy alloy and preparation method thereof

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Embodiment Construction

[0016] The present invention will be described in detail below through specific examples, but these examples are only exemplary and do not constitute any limitation to the present invention.

[0017] 1. The preparation of multi-principal high-entropy alloys is a key step. The preparation process is as follows:

[0018] 1) Raw material preparation: The alloy smelting raw materials used in the present invention are high-purity (≥99.9%) Ti, Zr, Nb, V and Mo elements, and the raw materials are mechanically removed from the scale, and the precise weighing ratio is carried out according to the molar ratio , cleaned with ultrasonic vibration in alcohol, used for smelting alloys, and the composition of the alloys is shown in Table 1.

[0019] Table 1TiZrNbVMo x (x=0, 0.3, 0.5, 0.7 and 1.0) Nominal composition (at%) of high-entropy alloys (HEAs)

[0020]

[0021] 2) Preparation of high-entropy alloys: the invention uses a vacuum non-consumable electric arc furnace or a cold crucib...

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Abstract

The invention relates to a high entropy alloy material and a preparation method thereof, the high entropy alloy composition is TiZrNbVMo[x], wherein x is the molar ratio with a value range of x = 0 ~ 1.0. The preparation method comprises the following steps: using a mechanical method to remove oxide skin of metallurgical raw materials of Ti, Zr, Nb, V and Mo elements, then accurately weighing according to the molar ratio; respectively melting intermediate alloys of MoTi and TiZrNbV in a non self-consumable vacuum electric-arc furnace or a cold crucible suspension furnace, finally putting the intermediate alloys together to melt into target alloys, melting each alloy for more than 3 times to ensure uniformity of the composition; taking a specific mass of a master alloy to preparing a rod or plate sample by use of vacuum suction casting or pouring equipment. Compared with traditional crystal materials, the high entropy alloy disclosed by the invention exhibits high hardness, yield strength and fracture strength, and compared with other high-strength body-core-structure high entropy alloys, the high entropy alloy disclosed by the invention has better plastic deformation ability.

Description

technical field [0001] The invention relates to the field of metal materials and their preparation, and provides a composition of TiZrNbVMo x (x is molar ratio, x=0-1.0) high-entropy alloy and its preparation method. Background technique [0002] For a long time, the traditional alloy design method is to use one or two elements as the main component, and then add other elements to improve the structure and properties of the material, such as magnesium alloy, aluminum alloy, titanium alloy and bulk amorphous alloy Wait. Traditional crystallographic theory believes that too many components in the alloy will lead to the formation of a variety of intermetallic compounds and other complex structures, making it lose its mechanical properties and making subsequent processing difficult. Over the years, the development of traditional alloy systems has become saturated. In 2004, Taiwanese scholar Ye Junwei and others took the lead in proposing a new alloy design concept, that is, m...

Claims

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Application Information

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IPC IPC(8): C22C30/00C22C1/02C22C1/03
Inventor 惠希东吴一栋王坦宋京国常丽
Owner UNIV OF SCI & TECH BEIJING
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