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Precipitation Hardening High Entropy Alloy and Method of Manufacturing the Same

a high entropy alloy and precipitation hardening technology, applied in the field of metal alloys, can solve the problems of manufacturing limitations, manufacturing process limitations, and the lik

Inactive Publication Date: 2019-01-24
THE IND & ACADEMIC COOPERATION & CHUNGNAM NAT UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Benefits of technology

The patent is about a new type of metal alloy that is strong and ductile. It is made by adding elements that can form small particles or carbides in the metal. These particles help to keep the metal in a high-entropy state, which makes it very strong. The method involves creating a solid solution of these added elements in the metal matrix. This new alloy has unique properties that make it useful in a variety of applications.

Problems solved by technology

Due to technological breakthroughs in industrial technology, conventional metals and alloys according to the related art have limitations in satisfying performance required for various applications.
However, in Patent Document 1, different types of relatively expensive and heavy alloying elements are added, so there may be a difficulty in a manufacturing process due to a wide difference of melting points among the alloying elements having been added.
However, in Patent Document 2, since a high temperature process is required when a ceramic material is used to manufacture an alloy, a problem in which limitations on manufacturing are present may occur.

Method used

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  • Precipitation Hardening High Entropy Alloy and Method of Manufacturing the Same
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  • Precipitation Hardening High Entropy Alloy and Method of Manufacturing the Same

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[0052]First, as illustrated in Table 1, a high-entropy alloy according to Comparative Examples 1 through 3 and Inventive Examples 1 through 13 is manufactured.

[0053]Pieces of constituent pure metals weighted to attain a composition (wt %) of Table 1 were prepared, and the mixed pieces were arc melted in a vacuum atmosphere to manufacture an alloy. Hereinafter, homogenization heat treating was performed at 1050° C. for 24 hours, and rapid cooling was performed.

[0054]The alloy, having been cooled after the homogenization heat treating, is rolled downed to the thickness of 1 mm, heat treated at 430° C. for 10 hours, so a precipitate was formed.

[0055]Meanwhile, regarding the high-entropy alloy having been manufactured as described above, a sheet having a thickness of 1 mm was tensile-tested, and mechanical properties were evaluated, which are illustrated in Table 1.

TABLE 1TensileYieldstrengthstrengthElongationDivisionAlloyPrecipitate form(MPa)(MPa)(%)ComparativeCo20Cr20Fe20Mn20Ni20—6204...

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Abstract

High-entropy alloy, particularly a precipitation hardening high entropy alloy, is provided as a component material used in electromagnetic, chemical, shipbuilding, mechanical, and other applications, a component material used in extreme environments requiring high strength and good corrosion resistance, and the like.

Description

BACKGROUND1. Field[0001]The present disclosure relates to a metal alloy, in detail, a high-entropy alloy, used as a component material in a device having electromagnetic, chemical, shipbuilding, mechanical, and other applications, a component material used in extreme environments requiring high strength and good corrosion resistance, and the like.2. Description of Related Art[0002]Due to technological breakthroughs in industrial technology, conventional metals and alloys according to the related art have limitations in satisfying performance required for various applications. To satisfy requirements for enhanced properties and multifunctionality, a new type of material referred to as a high-entropy alloy has recently been proposed and developed.[0003]A high-entropy alloy typically refers to a multi-component single phase alloy formed by the reduction of total free energy of the solid solution single phase due to a significant increase in configuration entropy of the multi-component ...

Claims

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Application Information

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IPC IPC(8): C21D1/18C22C1/02C22C1/04C22C30/02C22F1/00
CPCC21D1/18C22C1/02C22F1/00C22C30/02C22C1/04C22C1/0433C22C32/0052C22C32/0068C22C32/0078
Inventor HONG, SUN IGSONG, JAE SOOK
Owner THE IND & ACADEMIC COOPERATION & CHUNGNAM NAT UNIV
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