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FeMnCoCrAlRu high-entropy alloy and preparation method thereof

A technology of high-entropy alloys and process control agents, applied in the field of high-entropy alloys, can solve problems such as changing alloy phase composition and structure, reducing alloy plasticity and toughness, and achieving the effects of increasing specific strength, increasing strength, and good mechanical properties

Active Publication Date: 2018-03-02
KUNMING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantage of the mechanical alloying method is that the alloy powder will inevitably be polluted by the grinding medium, the atmosphere in the ball mill tank and the process control agent during the ball milling process, and the introduced impurities may also be mixed with the powder during the ball milling process. react to form new phases
Impurity contamination will change the phase composition and structure of the alloy, reducing the plasticity and toughness of the alloy

Method used

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  • FeMnCoCrAlRu high-entropy alloy and preparation method thereof
  • FeMnCoCrAlRu high-entropy alloy and preparation method thereof
  • FeMnCoCrAlRu high-entropy alloy and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0029] Example 1: Fe 36 mn 30 co 10 Cr 10 Al 4 Ru 10 The preparation method of high entropy alloy, concrete operation is as follows:

[0030] Step (1): Put the ball mill jar into the glove box, in an argon atmosphere, according to Fe 36 mn 30 co 10 Cr 10 Al 4 Ru 10 Atomic percentage of high-entropy alloy Weigh Fe, Mn, Co, Cr, Al and Ru powders under argon atmosphere, and mix them evenly, then put the mixed powder into a ball mill jar, and add process control agent hard Fatty acid, when the argon gas is full of the ball milling jar, close the ball milling jar, and take out the ball milling jar, put it into a ball mill and carry out ball milling, the ball milling medium is cemented carbide balls, the rotating speed of the ball mill is 350r / min, and the ball-to-material ratio is 20:1, And set it to turn clockwise for 10 minutes and then counterclockwise for 10 minutes. After working for 1 hour, stop the machine for 0.5 hours. After the ball mill works for 10 hours, put...

Embodiment 2

[0040] Example 2: Fe 32 mn 30 co 10 Cr 10 Al 8 Ru 10 The preparation method of high entropy alloy, concrete operation is as follows:

[0041] Step (1): Put the ball mill jar into the glove box, under argon atmosphere, according to Fe 32 mn 30 co 10 Cr 10 Al 8 Ru 10 The atomic percentage of the high-entropy alloy weighs Fe, Mn, Co, Cr, Al and Ru powders under an argon atmosphere, and mixes them evenly, then puts the mixed powder into a ball mill jar, and adds stearic acid into the ball mill jar, When the argon gas is full of ball milling jars, close the ball milling jars, take out the ball milling jars, and put them into a ball mill for ball milling. The ball milling medium is hard alloy balls. Turn clockwise for 15 minutes and then turn counterclockwise for 15 minutes. After working for 1.5 hours, stop the machine for 0.75 hours. After the ball mill works for 12 hours, open the ball mill tank under argon atmosphere, scrape off the powder sticking to the tank wall, a...

Embodiment 3

[0052] Example 3: Fe 30 mn 30 co 10 Cr 10 Al 10 Ru 10 The preparation method of high entropy alloy, concrete operation is as follows:

[0053] Step (1): Put the ball mill jar into the glove box, under argon atmosphere, according to Fe 30 mn 30 co 10 Cr 10 Al 10 Ru 10 The atomic percentage of the high-entropy alloy weighs Fe, Mn, Co, Cr, Al and Ru powders under an argon atmosphere, and mixes them evenly, then puts the mixed powder into a ball mill jar, and adds stearic acid into the ball mill jar, When the argon gas is full of ball milling jars, close the ball milling jars, take out the ball milling jars, and put them into a ball mill for ball milling. The ball milling medium is hard alloy balls. Turn clockwise for 20 minutes and then turn counterclockwise for 20 minutes. Stop the machine after working for 2 hours. The stop time is 1 hour. After the ball mill has been working for 15 hours, put the ball mill tank in the glove box and open it under argon atmosphere. T...

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Abstract

The invention discloses a FeMnCoCrAlRu high-entropy alloy and a preparation method thereof. The high-entropy alloy is composed of Fe, Mn, Co, Cr, Al and Ru; according to atomic ratio, the formula of the alloy is Fe(40-x)Mn30Co10Cr10AlXRu10, X is 4, 8, 10 or 12. The high-entropy alloy is prepared through combination of mechanical alloying and spark plasma sintering, wherein the preparation method includes the steps of ball-milling the element powders to obtain alloy powder, and producing high-entropy alloy bulk through the spark plasma sintering below the melting point. In the alloy, a certainamount of Ru is added to improve anti-corrosion performance of the alloy. In the invention, B2-phase precipitate is generated in a single-FCC single solid solution, thus forming precipitation strengthening. The alloy has face-centered-cubic high-strength and high-hardness and also is good in plasticity. The alloy has better mechanical performance and can generate twin crystals and martensites after plastic deformation, thereby greatly improving strength of the material.

Description

technical field [0001] The invention belongs to the technical field of high-entropy alloys, and in particular relates to a FeMnCoCrAlRu high-entropy alloy and a preparation method thereof. Background technique [0002] Traditional alloys are based on one or two elements, and some specific performance requirements can be achieved by adding a small amount of other elements. Professor Ye Junwei from Taiwan, China, proposed a brand-new alloy system, that is, multi-principal high-entropy alloys: "Multi-principal high-entropy alloys are mainly composed of multiple elements, with more than five main elements. The atomic percentage of each main element is between Between 5% and 35%, none of the components will exceed 50% in atomic percentage and become the only main element." The alloy has a high entropy value in thermodynamics, and has atomic slow diffusion effect in kinetics. The crystal structure has a lattice distortion effect. In addition, the characteristics of various elemen...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C30/00C22C1/04
CPCC22C1/04C22C30/00
Inventor 谭军李栋高俊妍付正容李敏石海
Owner KUNMING UNIV OF SCI & TECH
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