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Low-activation refractory medium-entropy alloy and preparation method thereof

An entropy alloy, low activation technology, applied in the field of metal materials, can solve the problems of damage to the toughness of multi-component alloys, and achieve the effects of excellent processing performance, good toughness and high strength

Active Publication Date: 2021-08-10
HARBIN ENG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

According to the binary phase diagrams of Cr-Ti, Cr-Hf and Zr-Ta, in a fairly wide range of composition and temperature, the phase composition of BCC+Laves or HCP+Laves will be formed, and the Laves phase will damage the multi-component alloy toughness

Method used

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  • Low-activation refractory medium-entropy alloy and preparation method thereof
  • Low-activation refractory medium-entropy alloy and preparation method thereof
  • Low-activation refractory medium-entropy alloy and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] Low activation refractory Ti 4 wxya 2.5 Ta 2.5 The preparation steps of medium entropy alloy are as follows:

[0039] (1) According to the required alloy atomic ratio, select the corresponding quality of pure Ti, pure V, pure Hf and pure Ta to configure as raw materials, the specific content is 40at.%Ti, 10at.%V, 25at.%Hf and 25at. %Ta. First put Ti and Ta, V and Hf together to prepare the master alloy by arc melting, and then put the master alloy together and use arc melting to form an ingot. During the smelting process, electromagnetic stirring is used to mix the alloy evenly, and finally cast into round ingots. The melting process and casting process are carried out under the protection of vacuum or inert atmosphere.

[0040] (2) Ti will be obtained 4 wxya 2.5 Ta 2.5 The medium entropy alloy ingot was rolled at room temperature, the total rolling reduction was 81%, and the rolling pass was 15 times.

[0041] (3) The Ti after cold rolling 4 wxya 2.5 Ta 2.5...

Embodiment 2

[0044] Low activation refractory Ti 4 wxya 2.5 Ta 2.5 The preparation steps of medium entropy alloy are as follows:

[0045] (1) According to the required alloy atomic ratio, select the corresponding quality of pure Ti, pure V, pure Hf and pure Ta to configure as raw materials, the specific content is 40at.%Ti, 10at.%V, 25at.%Hf and 25at. %Ta. First put Ti and Ta, V and Hf together to prepare the master alloy by arc melting, and then put the master alloy together and use arc melting to form an ingot. During the smelting process, electromagnetic stirring is used to mix the alloy evenly, and finally cast into round ingots. The melting process and casting process are carried out under the protection of vacuum or inert atmosphere.

[0046] (2) Ti will be obtained 4 wxya 2.5 Ta 2.5 The medium entropy alloy ingot was rolled at room temperature, the total rolling reduction was 81%, and the rolling pass was 15 times.

[0047] (3) The Ti after cold rolling 4 wxya 2.5 Ta 2.5...

Embodiment 3

[0050] Low activation refractory Ti 3.5 V 1.5 f 2.5 Ta 2.5 The preparation steps of medium entropy alloy are as follows:

[0051] (1) According to the required alloy atomic ratio, select the corresponding quality of pure Ti, pure V, pure Hf and pure Ta to configure as raw materials, the specific content is 35at.%Ti, 15at.%V, 25at.%Hf and 25at. %Ta. First put Ti and Ta, V and Hf together to prepare the master alloy by arc melting, and then put the master alloy together and use arc melting to form an ingot. During the smelting process, electromagnetic stirring is used to mix the alloy evenly, and finally cast into round ingots. The melting process and casting process are carried out under the protection of vacuum or inert atmosphere.

[0052] (2) Ti will be obtained 3.5 V 1.5 f 2.5 Ta 2.5 The medium entropy alloy ingot was rolled at room temperature, the total rolling reduction was 79%, and the rolling pass was 15 times.

[0053] (3) The Ti after cold rolling 3.5 V ...

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Abstract

The invention provides a low-activation refractory medium-entropy alloy and a preparation method thereof. The low-activation refractory medium-entropy alloy is expressed as TiaVbHfcTad according to the atomic ratio, 2.5 < = a < = 5, 0.5 < = b < = 2.5, 2 < = c < = 3, 2 < = d < = 3, and a + b + c + d = 10, the low-activation refractory medium-entropy alloy is prepared by the following method: (1) selecting pure Ti, pure V, pure Hf and pure Ta raw materials according to the proportion, and carrying out smelting pouring or suction casting to form a casting or a required cast ingot; (2) rolling; and (3) performing casting or rolling piece heat treatment. The entropy alloy prepared through the method has the characteristics of being high in strength, excellent in plasticity and toughness and low in activation at the same time, solid solution strengthening is conducted by properly adjusting the V content of the alloy, the tensile strength of different grades from 900 MPa to 1500 MPa can be obtained, the excellent plasticity and other mechanical properties can be obtained, meanwhile, a stable BCC single-phase solid solution structure is achieved in a wide temperature range, and good rolling machining performance is achieved.

Description

technical field [0001] The invention relates to an alloy and a preparation method thereof, in particular to a low-activation refractory medium-entropy alloy and a preparation method thereof, belonging to the technical field of metal materials. Background technique [0002] As an important clean energy, nuclear energy will occupy a considerable part in my country's future energy composition. In the fourth-generation reactors and future fusion reactors, the structural materials of the reactor will face harsh service environments. For example, the materials constituting the first wall of the fusion reactor will face the test of high-temperature plasma and high-energy neutrons. This puts forward certain requirements for the high-temperature mechanical properties and radiation resistance of reactor structural materials. At the same time, for the sake of environmental protection, there are also certain requirements for the residual radioactivity of reactor structural materials aft...

Claims

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Application Information

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IPC IPC(8): C22C30/00C22C1/02C22C1/03C22F1/18
CPCC22C30/00C22C1/02C22C1/03C22F1/18
Inventor 张中武蒋文清张洋韩基鸿刘力源
Owner HARBIN ENG UNIV
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