Quaternary hypoeutectic high-entropy alloy with good strong-plasticity matching and preparation method thereof

A high-entropy alloy and hypoeutectic technology, which is applied in the field of quaternary hypoeutectic high-entropy alloys and its preparation, can solve the problems that cannot overcome the trade-off between strength and plasticity, and achieve simple and reliable preparation methods, eutectic phase Fine and safe effect

Active Publication Date: 2021-04-16
QINGHAI UNIVERSITY
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  • Abstract
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  • Application Information

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Problems solved by technology

However, high-entropy alloys with a single-phase structure generally cannot overcome the trade-off between strength and plasticity

Method used

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  • Quaternary hypoeutectic high-entropy alloy with good strong-plasticity matching and preparation method thereof
  • Quaternary hypoeutectic high-entropy alloy with good strong-plasticity matching and preparation method thereof
  • Quaternary hypoeutectic high-entropy alloy with good strong-plasticity matching and preparation method thereof

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Embodiment 1

[0032] A Quaternary Hypoeutectic High-Entropy Alloy Al with Good Strong-Plasticity Matching 14 Cr 28 Fe 28 Ni 30 The preparation method, concrete steps are as follows:

[0033] Use SiC sandpaper and grinder to remove the surface impurities and oxides of Al, Co, Cr and Ni elemental metal raw materials, then place them in different containers and add alcohol, ultrasonic cleaning twice, the purity of Al, Co, Cr and Ni elemental metal raw materials are uniform Not less than 99.9 wt%,;

[0034] Weigh the Al, Co, Cr and Ni elemental metal raw materials after ultrasonic cleaning according to the molar ratio of 14:28:28:30, mix the raw materials with a total mass of 80g and place them in a high vacuum non-consumable arc melting furnace , under the protection of argon, in a vacuum of 2.5×10 ﹣3 Carry out arc melting under MPa, melting time is 8min, obtain alloy liquid, stir, cool, obtain alloy ingot;

[0035] Repeat the arc melting, stirring and cooling process after turning the a...

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Abstract

The invention discloses a quaternary hypoeutectic high-entropy alloy with good strong-plasticity matching, and the composition of the high-entropy alloy is Al x co y Cr z Ni w , wherein x, y, z and w respectively correspond to the molar ratio of the respective elements, 16≥x≥12, 30≥y≥26, 30≥z≥26, 32≥w≥28. This high-entropy alloy has a hypoeutectic structure and a good match between strong and plastic. Simultaneously the present invention provides the preparation method of this quaternary hypoeutectic high-entropy alloy, at first remove oxide skin from elemental metal, place in high-vacuum non-consumable electric arc melting furnace after weighing and mixing by molar ratio, in Under the protection of argon, arc melting is carried out under vacuum to obtain the alloy liquid, stir, and cool to obtain the alloy ingot; after repeated melting four times, the surface oxide skin of the obtained high-entropy alloy is removed, and the alloy ingot is cleaned twice with alcohol ultrasonic Placed in high vacuum arc melting flip casting and centrifugal casting system, remelted and cast into copper mold to obtain Al 14 co 28 Cr 28 Ni 30 High entropy alloy test sample. This method is simple, safe and stable.

Description

technical field [0001] The invention relates to the technical field of metal materials and their preparation, in particular to a quaternary hypoeutectic high-entropy alloy with good strong-plasticity matching and a preparation method thereof. Background technique [0002] High-entropy alloys have attracted extensive research interest due to their excellent high-temperature mechanical properties, corrosion resistance, wear resistance, and oxidation resistance. Most of the previously reported high-entropy alloys exhibit a single face-centered cubic (FCC) or body-centered cubic (BCC) phase structure. However, high-entropy alloys with a single-phase structure generally cannot overcome the trade-off between strength and plasticity. Therefore, in order to achieve a balance between strength and plasticity, a dual-phase structure high-entropy alloy combining "soft" and "hard" was designed. [0003] For dual-phase structure alloys, their mechanical properties are closely related to...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C30/00C22C1/02
CPCC22C1/02C22C19/058C22C30/00
Inventor 马丽莉王家宁马国俊马斌高满金培鹏
Owner QINGHAI UNIVERSITY
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