Multi-principal-element alloy containing BCC/B2 double-phase structure and preparation method of multi-principal-element alloy

A multi-principal alloy, phase structure technology, applied in the field of metal materials, can solve the problems of incompatibility between strength and plasticity, and achieve the effect of improving high temperature oxidation resistance, good plasticity, and deteriorating mechanical properties

Active Publication Date: 2021-07-09
浙江省科创新材料研究院
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Aiming at the problem that the strength and plasticity of BCC / B2 dual-phase structure multi-principal alloys are currently incompatible, the present invention provides a BCC / B2 dual-phase structure multi-principal alloy and its preparation method. By optimizing the alloy composition elements, each The content of the elements and the microstructure can obtain a multi-principal alloy with good plasticity and high strength; and the preparation method of the alloy is simple, safe and reliable, and has a good application prospect

Method used

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  • Multi-principal-element alloy containing BCC/B2 double-phase structure and preparation method of multi-principal-element alloy

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Experimental program
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Effect test

Embodiment 1

[0039] A multi-principal alloy of BCC / B2 dual-phase structure, its constituent elements and the atomic percentages of each element are as follows: titanium (Ti) 33.25at.%, tantalum (Ta) 14.25at.%, niobium (Nb) 23.75 at.%, zirconium (Zr) 23.75 at.%, and aluminum (Al) 5 at.%. The steps of the preparation method of the multi-principal alloy are as follows:

[0040] (1) Weigh the elemental substances of Ti, Ta, Nb, Zr and Al with a purity greater than 99.9wt.% according to the atomic percentage, and put them into the crucible of the non-consumable vacuum arc melting furnace according to the melting point of the elemental substances from low to high, and place Vacuum the furnace to ≤5×10 - 3 Argon gas is introduced after Pa, and then alloyed and smelted. The alloy liquid formed by melting is cooled to room temperature in a water-cooled copper mold to obtain an alloy ingot, and then the alloy ingot is turned over and smelted repeatedly for 6 times to obtain an alloy ingot;

[004...

Embodiment 2

[0045] A multi-principal alloy of BCC / B2 dual-phase structure, its constituent elements and the atomic percentages of each element are as follows: titanium (Ti) 31.5 at.%, tantalum (Ta) 13.5 at.%, niobium (Nb) 22.5 at.%, zirconium (Zr) 22.5 at.%, and aluminum (Al) 10 at.%. The steps of the preparation method of the multi-principal alloy are as follows:

[0046] (1) Weigh the elemental substances of Ti, Ta, Nb, Zr and Al with a purity greater than 99.9wt.% according to the atomic percentage, and put them into the crucible of the non-consumable vacuum arc melting furnace according to the melting point of the elemental substances from low to high, and place Vacuum the furnace to ≤5×10 - 3 Argon gas is introduced after Pa, and then alloyed and smelted. The alloy liquid formed by melting is cooled to room temperature in a water-cooled copper mold to obtain an alloy ingot, and then the alloy ingot is turned over and smelted repeatedly for 6 times to obtain an alloy ingot;

[0047...

Embodiment 3

[0051] A multi-principal alloy of BCC / B2 dual-phase structure, its constituent elements and the atomic percentage of each element are as follows: titanium (Ti) 42at.%, tantalum (Ta) 8at.%, niobium (Nb) 15at.% , zirconium (Zr) 25at.%, aluminum (Al) 9at.%, and chromium (Cr) 1at.%. The steps of the preparation method of the multi-principal alloy are as follows:

[0052] (1) Weigh the elemental substances of Ti, Ta, Nb, Zr, Al and Cr with a purity greater than 99.9wt.% according to the atomic percentage, and put them into the crucible of the non-consumable vacuum arc melting furnace according to the melting point of the elemental substances from low to high , vacuum the furnace to ≤5×10 -3 Argon gas is introduced after Pa, and then alloyed and smelted. The alloy liquid formed by smelting is cooled to room temperature in a water-cooled copper mold to obtain an alloy ingot, and then the alloy ingot is turned over and repeatedly smelted 5 times to obtain an alloy ingot;

[0053] (2...

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Abstract

The invention relates to a multi-principal-element alloy containing a BCC / B2 double-phase structure and a preparation method of the multi-principal-element alloy and belongs to the technical field of metal materials. The multi-principal-element alloy is of a woven BCC / B2 double-phase structure, the chemical formula of the multi-principal-element alloy is recorded as TiaTabNbcZrdAleMf according to the atomic percentage content of all elements, M is at least one of V, Cr, Ni, Cu, Fe, Si, Mg, Y, B, C and O, a is greater than 30 and less than or equal to 60, b is greater than 0 and less than or equal to 15, c is greater than or equal to 5 and less than or equal to 50, d is greater than or equal to 5 and less than or equal to 40, e is greater than or equal to 5 and less than 15, f is greater than or equal to 0 and less than or equal to 10, b+c+d is greater than or equal to 40 and less than or equal to 75, b / d is greater than or equal to 0.3 and less than or equal to 0.6, and the multi-principal-element alloy has good plasticity and high strength by optimizing the composition elements of the multi-principal-element alloy, the content of all the elements and the microstructure. In addition, the multi-principal-element alloy can be obtained through alloy smelting and annealing treatment, the preparation method is simple, safe and reliable, and good application prospects are achieved.

Description

technical field [0001] The invention relates to a multi-principal alloy containing BCC / B2 dual-phase structure and a preparation method thereof, belonging to the technical field of metal materials. Background technique [0002] Multi-principal alloy refers to a new type of metal material composed of three or more elements in an approximately equal atomic ratio. The emergence of multi-principal alloys breaks the traditional concept of alloy design based on one or two elements, and increases the freedom of alloy design. The unique high-entropy effect, hysteretic diffusion effect, lattice distortion effect and cocktail effect of multi-principal alloys give the alloy a unique structure and excellent performance, so it has attracted widespread attention at home and abroad. [0003] In recent years, researchers have found that multi-principal alloys with a body-centered cubic (BCC) structure exhibit outstanding high-temperature strength, good wear resistance, good corrosion resis...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C30/00C22C27/02C22C1/02C22F1/02C22F1/18
CPCC22C30/00C22C27/02C22C1/02C22F1/02C22F1/18
Inventor 靳柯董亚光王本鹏薛云飞
Owner 浙江省科创新材料研究院
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