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A kind of alfenicrmo high entropy alloy, preparation method and application thereof

A technology of high-entropy alloys and alloys, applied in the field of high-entropy alloys, to achieve good corrosion resistance, reduce production costs, and solve the effects of radiation embrittlement and induced radioactivity

Active Publication Date: 2022-03-18
NUCLEAR POWER INSTITUTE OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Judging from the current public reports, the current conventional high-entropy alloys basically contain Cu or Co elements, and Cu elements are important elements that cause radiation embrittlement of steel used in nuclear reactor pressure vessels, and Co elements are easy to cause radiation activation.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] This embodiment provides an AlFeNiCrMo high-entropy alloy, and the specific preparation steps are as follows:

[0032] Step (1) batching-mixing-compression molding

[0033] Using Al powder, Fe powder, Ni powder, Cr powder and Mo powder as raw materials, according to the expression Al a Fe b Ni c Cr d Mo e In, the atomic ratio of each component of Al, Fe, Ni, Cr and Mo is a=0.05, b=2.5, c=4.0, d=1.0 and e=1.5 carry out batching and weigh each component; Then each raw material The powder is placed in a high-energy ball mill for mechanical ball milling, the ball milling speed is 300r / min, the ball milling time is 10h, the ball-to-material ratio is 10:1, and the ball milling inhibitor is absolute ethanol. After the mechanical ball milling, the mixed powder is pressed into a cylindrical compact on a hydraulic press, and then vacuum-packed for use.

[0034] Step (2) Melting

[0035] The cylindrical green compact formed by pressing in step (1) is placed in a copper cruc...

Embodiment 2

[0037] This embodiment provides an AlFeNiCrMo high-entropy alloy, and the specific preparation steps are as follows:

[0038] Step (1) batching-mixing-compression molding

[0039] Using Al powder, Fe powder, Ni powder, Cr powder and Mo powder as raw materials, according to the expression Al a Fe b Ni c Cr d Mo e Among them, the atomic ratio of each component of Al, Fe, Ni, Cr and Mo is a=0.1, b=1.5, c=2.5, d=1.5 and e=1.0 for batching and weighing each component; then each raw material The powder is placed in a high-energy ball mill for mechanical ball milling, the ball milling speed is 350r / min, the ball milling time is 5h, the ball-to-material ratio is 5:1, and the ball milling inhibitor is absolute ethanol. After the mechanical ball milling, the mixed powder is pressed into a cylindrical compact on a hydraulic press, and then vacuum-packed for use.

[0040] Step (2) arc melting

[0041] The cylindrical green compact formed by pressing in step (1) is placed in a copper ...

Embodiment 3

[0043] This embodiment provides an AlFeNiCrMo high-entropy alloy, and the specific preparation steps are as follows:

[0044] Step (1) batching-mixing-compression molding

[0045] Using Al powder, Fe powder, Ni powder, Cr powder and Mo powder as raw materials, according to the expression Al a Fe b Ni c Cr d Mo e Among them, the atomic ratio of each component of Al, Fe, Ni, Cr and Mo is a=0.15, b=1.0, c=2.5, d=1.0 and e=1.0 for batching and weighing each component; then each raw material The powder is placed in a high-energy ball mill for mechanical ball milling, the ball milling speed is 250r / min, the ball milling time is 15h, the ball-to-material ratio is 15:1, and the ball milling inhibitor is zinc hard acid. After the mechanical ball milling, the mixed powder is pressed into a cylindrical compact on a hydraulic press, and then vacuum-packed for use.

[0046] Step (2) arc melting

[0047] The cylindrical green compact formed by pressing in step (1) is placed in a copp...

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Abstract

The invention discloses an AlFeNiCrMo high-entropy alloy, the expression of the high-entropy alloy is Al a Fe b Ni c Cr d Mo e , in the expression, a, b, c, d, and e are the atomic ratios corresponding to each component, satisfying the conditions: a is 0.05~0.5, b is 1.0~3.5, c is 1.5~4.0, d is 1.0~3.5, e is 1.0 to 2.5. The raw materials weighed according to the designed ratio are mixed and processed into a compact, and finally the compact is smelted by a vacuum arc melting process to obtain the above-mentioned high-entropy alloy sample. The present invention effectively solves the radiation problem caused by cobalt and copper elements by removing cobalt and copper elements. At the same time, the high-entropy alloy of the present invention can obtain excellent comprehensive mechanical properties by adjusting the components of each component, thereby obtaining both High-entropy alloys with excellent mechanical properties and radiation damage resistance provide a new idea for the design and material selection of nuclear reactor pressure vessels.

Description

technical field [0001] The invention relates to the technical field of high-entropy alloys, in particular to an AlFeNiCrMo high-entropy alloy, a preparation method and its application, in particular to an AlFeNiCrMo high-entropy alloy for nuclear reactor pressure vessels and a preparation method thereof. Background technique [0002] Reactor Pressure Vessel (RPV), as the only non-replaceable large-scale key equipment in the lifetime of a nuclear power plant, operates in high temperature, high pressure, and strong radiation environments for a long time, and its service capability directly determines the safety and service life of the entire nuclear power plant. At present, the reactor pressure vessel material is mainly made of ferritic steel, but this type of material is cold and brittle. At the same time, under irradiation and high temperature environment, the material is prone to precipitate solute precipitation (Cu-rich clusters), matrix damage, and grain boundary segregati...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C30/00C22B9/20C22C1/03G21C13/087
CPCC22C30/00C22C1/03C22B9/20G21C13/087Y02E30/30
Inventor 舒茗孔清泉安旭光王丛林陈勇王辉刘睿睿
Owner NUCLEAR POWER INSTITUTE OF CHINA