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Precipitation-strengthening type AlCrFeNiV system high-entropy alloy and preparation method thereof

A high-entropy alloy, precipitation strengthening technology, applied in the field of metal materials, can solve the problem of low high-entropy alloy, achieve high strength and improve the effect of strength

Active Publication Date: 2018-06-22
BEIJING INSTITUTE OF TECHNOLOGYGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] In view of the problem that the current FCC structure high-entropy alloys generally have low strength, the purpose of the present invention is to provide a precipitation-strengthened AlCrFeNiV system high-entropy alloy and a preparation method thereof. The high-entropy alloy is prepared by melting and forming technology and deformation heat treatment process. into, forming a disordered FCC with an ordered L1 2 Two-phase coherent amplitude modulation structure with fine grains significantly improves the strength of high-entropy alloys

Method used

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  • Precipitation-strengthening type AlCrFeNiV system high-entropy alloy and preparation method thereof
  • Precipitation-strengthening type AlCrFeNiV system high-entropy alloy and preparation method thereof
  • Precipitation-strengthening type AlCrFeNiV system high-entropy alloy and preparation method thereof

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Embodiment 1

[0034] al 0.38 Cr 0.69 Fe 0.6 Ni 2.12 V 0.17 The specific preparation steps of high-entropy alloy (hereinafter referred to as high-entropy alloy 1) are as follows:

[0035] (1) Ingredients: Use sandpaper and grinder to remove impurities such as Al, Cr, Fe, Ni and V surface oxide scales, and then use acetone and absolute ethanol for ultrasonic cleaning to obtain clean metal elements; according to the measurement in the chemical formula Ratio, accurately weigh Al, Cr, Fe, Ni and V, the total mass of raw materials is 80g;

[0036] (2) Smelting: stack the clean metal elements from bottom to top in the order of melting point from low to high in the water-cooled copper crucible of the high-vacuum non-consumable arc melting furnace, and then vacuumize until the vacuum degree in the melting furnace up to 2.5×10 -3 Pa, and then filled with high-purity argon as a protective gas; first smelt pure Ti metal ingots to further reduce the oxygen content in the smelting furnace cavity, a...

Embodiment 2

[0043] al 0.6 Cr 0.84 Fe 1.2 Ni 3 V 0.24 The specific preparation steps of high-entropy alloy (hereinafter referred to as high-entropy alloy 2) are as follows:

[0044] (1) Ingredients: Use sandpaper and grinder to remove impurities such as Al, Cr, Fe, Ni and V surface oxide scales, and then use acetone and absolute ethanol for ultrasonic cleaning to obtain clean metal elements; according to the measurement in the chemical formula Ratio, accurately weigh Al, Cr, Fe, Ni and V, the total mass of raw materials is 80g;

[0045] (2) Smelting: stack the clean metal elements from bottom to top in the order of melting point from low to high in the water-cooled copper crucible of the high-vacuum non-consumable arc melting furnace, and then vacuumize until the vacuum degree in the melting furnace up to 2.5×10 -3 Pa, and then filled with high-purity argon as a protective gas; first smelt pure Ti metal ingots to further reduce the oxygen content in the smelting furnace cavity, and t...

Embodiment 3

[0052] al 0.5 Cr 0.55 FeNi 2.5 V 0.2 The specific preparation steps of high-entropy alloy (hereinafter referred to as high-entropy alloy 3) are as follows:

[0053] (1) Ingredients: Use sandpaper and grinder to remove impurities such as Al, Cr, Fe, Ni and V surface oxide scales, and then use acetone and absolute ethanol for ultrasonic cleaning to obtain clean metal elements; according to the measurement in the chemical formula Ratio, accurately weigh Al, Cr, Fe, Ni and V, the total mass of raw materials is 80g;

[0054] (2) Smelting: stack the clean metal elements from bottom to top in the order of melting point from low to high in the water-cooled copper crucible of the high-vacuum non-consumable arc melting furnace, and then vacuumize until the vacuum degree in the melting furnace up to 2.5×10 -3 Pa, and then filled with high-purity argon as a protective gas; first smelt pure Ti metal ingots to further reduce the oxygen content in the smelting furnace cavity, and then c...

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Abstract

The invention relates to a precipitation-strengthening type AlCrFeNiV system high-entropy alloy and a preparation method thereof, and belongs to the technical field of metal materials. The high-entropy alloy comprises, by atomic weight ratio, 0.30-0.60 of Al, 0.20-0.89 of Cr, 0.60-1.20 of Fe, 1.50-3.50 of Ni and 0.10-0.30 of V; and the high-entropy alloy is prepared by a smelting molding process and a deformation heat treatment process. According to the precipitation-strengthening type AlCrFeNiV system high-entropy alloy and the preparation method thereof, the content of each element is regulated, and the synthesis process is optimized, so that a modulation structure of two-phase coherency of unordered FCC and ordered L12 is obtained; and the grain size is small, and the strength of the high-entropy alloy is significantly increased.

Description

technical field [0001] The invention relates to a precipitation-enhanced AlCrFeNiV system high-entropy alloy and a preparation method thereof, belonging to the technical field of metal materials. Background technique [0002] Traditional alloys are usually dominated by a single element, and other elements are added in small amounts. However, high-entropy alloys break through the design concept of traditional alloys, using multiple elements as the main element, and the atomic percentage of each main element is 5% to 35%. Of course, the addition of trace elements is not excluded, but the atomic percentage of trace elements is less than 5. %. Compared with traditional alloys, high-entropy alloys exhibit good strength, hardness, wear resistance, corrosion resistance, and thermal stability due to high entropy effects, hysteretic diffusion effects, lattice distortion effects, and cocktail effects. [0003] Although high-entropy alloys have excellent comprehensive properties, mos...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C19/05C22C30/00C22C1/03C22F1/02C22F1/10
CPCC22C1/023C22C1/03C22C19/05C22C30/00C22F1/02C22F1/10C22C19/058
Inventor 薛云飞王林静王本鹏肖乾耿粒伦王鲁王富耻
Owner BEIJING INSTITUTE OF TECHNOLOGYGY
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