Thermomechanical treatment method of eutectic high-entropy alloys

A technology of thermo-mechanical treatment and high-entropy alloy, which is applied in the field of materials to achieve the effects of improving mechanical properties, improving strength and plasticity, and promoting the formation of precipitates

Active Publication Date: 2020-04-28
NORTHWESTERN POLYTECHNICAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

This patented method allows for better control over crystal structure during processing by combining different techniques such as surface hardenings or deformation processes with thermal stress. By doing these steps, we can achieve stronger materials without losing their ability to form new phases when subjected to severe conditions like temperature cycling or impact loading. Additionally, it suggests studying how well certain types of metals have strong intermetal bonds between them called nickel metaalloids (Ni3Co). These structures help prevent crack initiation under extreme environmental factors like pressure load cycles. Overall, our technical results include enhanced material performance through optimized manufacturing methods combined with specific physical mechanisms involved in promoting phase separation.

Problems solved by technology

This patented technical problem addressed in this patents relates to finding better ways to enhance the quality of materials made from these types of metals due to improved physical/chemical property values compared to existing methods like casting techniques.

Method used

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  • Thermomechanical treatment method of eutectic high-entropy alloys
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  • Thermomechanical treatment method of eutectic high-entropy alloys

Examples

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Embodiment 1

[0035] Ni 30 co 30 Fe 10 Cr 10 al 18 W 2 A thermomechanical treatment method for eutectic high-entropy alloys, comprising the following steps:

[0036] S1, Ni 30 co 30 Fe 10 Cr 10 al 18 W 2 Preparation of Eutectic High Entropy Alloys

[0037] Alloy ingredients: Use the mechanical grinding method to remove the oxide skin on the surface of the elements of Ni, Co, Fe, Cr, Al, W, then place them in different containers and add alcohol solution, ultrasonic cleaning, take out and dry the alcohol to obtain ultrasonic treatment After the six kinds of raw materials, the six kinds of metal raw materials are pretreated according to Ni 30 co 30 Fe 10 Cr 10 al 18 W 2 Mole percentage weighing of eutectic high-entropy alloy;

[0038] Master alloy smelting: put Ni, Co, Fe, Cr, W raw materials into the crucible of vacuum induction melting furnace, put the preheated steel ingot mold into the furnace, hang Al above the crucible through Ni wire; vacuumize with mechanical pump A...

Embodiment 2

[0047] The method is the same as in Example 1, except that the aging treatment time in S3 is 1 h.

Embodiment 3

[0049] The method is the same as in Example 1, except that the aging treatment time in S3 is 2 hours.

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Abstract

The invention provides a thermomechanical treatment method of eutectic high-entropy alloys. The thermomechanical treatment method includes the following steps that S1, multiple times of rolling and recrystallization processing are conducted; S2, pre-straining and aging treatment are conducted; and in other words, multiple times of rolling and recrystallization processing are conducted on the eutectic alloys, then pre-straining and aging treatment are conducted, and the eutectic alloys subjected to thermomechanical treatment are obtained. According to the thermomechanical treatment method, by using mechanical treatment and multiple thermal treatment processes for the eutectic alloys, interface reinforcement, dislocation strengthening and precipitation strengthening are combined, the ultrahigh-strength eutectic alloys are obtained, and wide industrial application prospects are achieved.

Description

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Claims

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Application Information

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Owner NORTHWESTERN POLYTECHNICAL UNIV
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