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A kind of high hardness al-cr-ti-v-cu light high entropy alloy and preparation method thereof

An al-cr-ti-v-cu, high-entropy alloy technology, applied in the field of alloys, can solve the problems of high room temperature brittleness and limited application, and achieve good thermal stability, high hardness, and improved hardness

Active Publication Date: 2022-07-22
JIANGSU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Most of the lightweight high-entropy alloys exhibit BCC phase and multi-phase structure, so they are brittle at room temperature, which limits their further applications.

Method used

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  • A kind of high hardness al-cr-ti-v-cu light high entropy alloy and preparation method thereof
  • A kind of high hardness al-cr-ti-v-cu light high entropy alloy and preparation method thereof
  • A kind of high hardness al-cr-ti-v-cu light high entropy alloy and preparation method thereof

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Effect test

Embodiment 1

[0030] In the high-hardness Al-Cr-Ti-V-Cu light high-entropy alloy in this embodiment, the atomic percentage of each element is as follows: Al 24%, Cr 24%, Ti 23%, V 23%, Cu 6%, expressed as Al 24 Cr 24 Ti 23 V 23 Cu 6 Lightweight high-entropy alloys.

[0031] above Al 24 Cr 24 Ti 23 V 23 Cu 6 The preparation method of light high entropy alloy is as follows:

[0032] (1) Prepare the metal raw materials Al, Cr, Ti, V, Cu and metal titanium blocks according to the ratio, and polish the raw materials and metal titanium blocks with sandpaper to remove impurities and oxides on the surface. The purity of each metal raw material is higher than 99.9wt%, using acetone as a cleaning solvent after grinding, oscillating cleaning for 5min in an ultrasonic cleaning machine with a power of 180W and a frequency of 40KHz, and drying.

[0033] (2) In a non-consumable vacuum arc melting furnace, the metal titanium block is first melted under the protection of argon gas, and the residua...

Embodiment 2

[0036] In the high-hardness Al-Cr-Ti-V-Cu light high-entropy alloy in this embodiment, the atomic percentage of each element is as follows: Al21%, Cr 21%, Ti 22%, V 23%, Cu 13%, expressed as Al 21 Cr 21 Ti 22 V 23 Cu 13 Lightweight high-entropy alloys.

[0037] above Al 21 Cr 21 Ti 22 V 23 Cu 13 The preparation method of light high entropy alloy is as follows:

[0038] (1) Prepare the metal raw materials Al, Cr, Ti, V, Cu and metal titanium blocks according to the ratio, and polish the raw materials and metal titanium blocks with sandpaper to remove impurities and oxides on the surface. The purity of each metal raw material is higher than 99.9wt%, using acetone as a cleaning solvent after grinding, oscillating cleaning for 5min in an ultrasonic cleaning machine with a power of 180W and a frequency of 40KHz, and drying.

[0039](2) In a non-consumable vacuum arc melting furnace, the metal titanium block is first melted under the protection of argon gas, and the residu...

Embodiment 3

[0042] In the high-hardness Al-Cr-Ti-V-Cu light high-entropy alloy in this embodiment, the atomic percentage of each element is as follows: Al21%, Cr 20%, Ti 21%, V 20%, Cu 18%, expressed as Al 21 Cr 20 Ti 21 V 20 Cu 18 Lightweight high-entropy alloys.

[0043] above Al 21 Cr 20 Ti 21 V 20 Cu 18 The preparation method of light high entropy alloy is as follows:

[0044] (1) Prepare the metal raw materials Al, Cr, Ti, V, Cu and metal titanium blocks according to the ratio, and polish the raw materials and metal titanium blocks with sandpaper to remove impurities and oxides on the surface. The purity of each metal raw material is higher than 99.9wt%, using acetone as a cleaning solvent after grinding, oscillating cleaning for 5min in an ultrasonic cleaning machine with a power of 180W and a frequency of 40KHz, and drying.

[0045] (2) In a non-consumable vacuum arc melting furnace, the metal titanium block is first melted under the protection of argon gas, and the resid...

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Abstract

The invention provides a high-hardness Al-Cr-Ti-V-Cu light-weight high-entropy alloy and a preparation method thereof, belonging to the field of metal materials and preparation. The main components of the high-entropy alloy are composed of: Al 20-25%, Cr 20-25%, Ti 20-25%, V 20-25%, Cu 0-20%, and Cu 0-20%. The content is not 0. The phase structure of the alloy is mainly characterized by a gradual transformation from a single-phase structure to a multi-phase structure, mainly from a single BCC phase structure to a BCC+FCC phase and a small amount of HCP phase structure, and finally to FCC+HCP. phase structure. And showed high hardness above 650HV and good thermal stability. The invention also provides a preparation method of the Al-Cr-Ti-V-Cu high-entropy alloy, which adopts vacuum arc melting and direct casting to obtain an alloy ingot; the preparation process is pollution-free, low in energy consumption and low in cost.

Description

technical field [0001] The invention relates to the technical field of alloys, in particular to a high-hardness Al-Cr-Ti-V-Cu light-weight high-entropy alloy and a preparation method thereof. Background technique [0002] Traditional alloys mainly contain a main element, and this main element is an alloy formed by adding a small amount of other elements. This design philosophy limits alloy properties. Therefore, in order to break this limitation, Professor Junwei Ye et al. studied and proposed a new alloy concept. That is, an alloy composed of five or more elements, and the atomic percentage of each element is between 5% and 35%, and is named as a high-entropy alloy. High-entropy alloys exhibit excellent properties, such as high strength, high hardness, good high temperature resistance, corrosion resistance, and wear resistance. It can be applied to high-speed cutting tools, turbine blades, wear-resistant coatings, etc. However, in order to further meet the requirements ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C30/02C22C1/02
CPCC22C30/02C22C1/02
Inventor 彭振骆再斌范子泽刘满平
Owner JIANGSU UNIV
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