High-plasticity and high-strength high-entropy alloy and preparation method thereof

A high-entropy alloy and high-strength technology, applied in the field of high-entropy alloys, can solve the problem that high-entropy alloys cannot have both high plasticity and high strength at the same time, and achieve the effect of simple preparation method and strong process controllability

Active Publication Date: 2021-09-24
HARBIN ENG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to solve the problem that the existing high-entropy alloys cannot have high plasticity and high strength at the same time. The present invention provides a high-entropy high-entropy alloy with high plasticity and high strength, so that it has greater application potential, and Provide a kind of preparation method of this high entropy alloy

Method used

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  • High-plasticity and high-strength high-entropy alloy and preparation method thereof
  • High-plasticity and high-strength high-entropy alloy and preparation method thereof
  • High-plasticity and high-strength high-entropy alloy and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0032] Metal nickel, metal cobalt, metal iron, metal niobium, and metal vanadium are selected, and the composition of the high-entropy alloy is as follows (atomic percent): Ni=40.0, Co=27.0, Fe=27.0, Nb=3.0, V=3.0.

[0033] Cast alloy ingots by arc melting or induction melting; smelting is carried out in vacuum or argon protection, and magnetic stirring technology is used to mix the metal solution evenly during the melting process; protection casting is carried out under vacuum or argon protection, and the size is cast into square or round ingot;

[0034] The ingot and billet are heated to 1300±10°C, held for 10 hours and then quenched;

[0035] Cold rolling the cast ingot and slab at room temperature, the first large deformation cold rolling amount is 60%;

[0036] Perform intermediate annealing at 1200±10°C for large-deformation cold-rolled plates, hold for 3 hours, and then quench;

[0037] Carry out cold rolling with a small deformation of 5% again on the plate after int...

Embodiment 2

[0042] Metal nickel, metal cobalt, metal iron, metal niobium, and metal vanadium are selected, and the composition of the high-entropy alloy is as follows (atomic percent): Ni=30.0, Co=25.0, Fe=25.0, Nb=10.0, V=10.0.

[0043] Cast alloy ingots by arc melting or induction melting; smelting is carried out in vacuum or argon protection, and magnetic stirring technology is used to mix the metal solution evenly during the melting process; protection casting is carried out under vacuum or argon protection, and the size is cast into square or round ingot;

[0044] The ingot casting billet is heated to 1000±10°C, kept for 24 hours and then quenched;

[0045] Cold rolling the cast ingot and slab at room temperature, the first large deformation cold rolling amount is 85%;

[0046] Perform intermediate annealing at 1000±10°C for large-deformation cold-rolled plates, hold for 3 hours, and then quench;

[0047] Carry out cold rolling with a small deformation of 9% again on the plate afte...

Embodiment 3

[0052] Metal nickel, metal cobalt, metal iron, metal niobium, and metal vanadium are selected, and the composition of the high-entropy alloy is as follows (atomic percent): Ni=35.0, Co=27.5, Fe=27.5, Nb=5.0, V=5.0.

[0053] Cast alloy ingots by arc melting or induction melting; smelting is carried out in vacuum or argon protection, and magnetic stirring technology is used to mix the metal solution evenly during the melting process; protection casting is carried out under vacuum or argon protection, and the size is cast into square or round ingot;

[0054] The ingot and billet are heated to 1200±10°C, kept for 15 hours and then quenched;

[0055] Cold rolling the cast ingot and slab at room temperature, the first large deformation cold rolling amount is 90%;

[0056] Perform intermediate annealing at 1200±10°C for large-deformation cold-rolled plates, holding time for 1h, and then quenching;

[0057] Carry out cold rolling with a small deformation of 10% again on the plate af...

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Abstract

The invention discloses a high-plasticity and high-strength high-entropy alloy and a preparation method thereof. The expression of the high-entropy alloy is NiaCobFecNbdVe, and a, b, c, d and e in the expression of the alloy respectively represent the atomic percentage content of each corresponding principal element and meet the following conditions that a is 40-30, b is 35-25, c is 35-25, d is 10-3, e is 10-3, and the sum of a, b, c, d and e is equal to 100. According to the high-entropy alloy, stacking fault energy of the alloy and the precipitation volume fraction of a nano precipitated phase are regulated and controlled by adjusting the content of each principal element, so that high plasticity and high strength are obtained. The yield strength of the high-entropy alloy reaches 1000 MPa, the tensile strength can reach 1300 MPa, and the ductility reaches up to 50%. The high-strength and high-plasticity high-entropy alloy can be used in the key high-technology fields of nuclear power, aviation, aerospace, navigation and the like.

Description

technical field [0001] The invention relates to a high-plastic high-strength high-entropy alloy and a preparation method thereof, belonging to the technical field of high-entropy alloys. Background technique [0002] Traditional alloys usually use one element as the main component, and the overall performance of the alloy is improved by adding a small amount of other minor elements, but according to the Gibbs Phase Rule, the excessive addition of alloying element types will lead to Excessive intermetallic compounds are produced. Once brittle compounds are formed, the properties of the alloy will be seriously affected, leading to the deterioration of the properties of the alloy. Therefore, in the design concept of traditional alloys, on the premise of satisfying the performance of the alloy, the types of alloying elements should be reduced as much as possible. [0003] However, the design philosophy of high-entropy alloys is completely different from that of traditional allo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C30/00C21D9/00C22C1/02C22F1/00B21B3/00
CPCC22C30/00C22C1/02C22F1/002C21D9/0081B21B3/00
Inventor 张中武刘力源张洋韩基鸿李俊澎崔烨孙利昕陈丹
Owner HARBIN ENG UNIV
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