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์˜์–ด ๋…ผ๋ๅฉ (๋ฆฌ๋ทฐ ๋…ผ๋ๅฉ - High Entropy Alloy)

์ œ๊ฐ€ ์กธ์—…ํ•œ ํ•™๊ป“๋Š” ์กธ์—… ์š”๊ฑด์— '์˜์–ด ์ธ์ฆ ์ ์ˆ˜(ex ํ† ์ต800)'์ด ์žˆ๋Š”๊ฒŒ ์•„๋‹ˆ๋ผ, ์—ฌ๋Ÿฌ ์˜์–ด ์ˆ˜์—…์„ ์ˆ˜๊ฐ•ํ•˜๊ณ  passํ•ด์•ผ ์กธ์—…ํ•  ์ˆ˜ ์žˆ๋Š” ๋ฐฉ์‹์ž…๋‹ˆ๋‹ค. ์ตœ์ข… ์ˆ˜์—…์„ ๋“ค์œผ๋ฉด์„œ ์ž‘์„ฑํ•œ ๋ฆฌ๋ทฐ ๋…ผ๋ๅฉ์ž…๋‹ˆ๋‹ค. High Entropy Alloy์— ๊ด€ํ•œ 8๊ฐœ์˜ ๋…ผ๋ๅฉ์„ ์ฝ๊ณ , ์ •๋ฆฌํ•œ ๋ฆฌ๋ทฐ ๋…ผ๋ๅฉ์ž…๋‹ˆ๋‹ค. ์›Œ๋“œ 15ํŽ˜์ด์งฟ’, 3000๋‹จ์–ด ์ด์ƒ ์ฐธ๊ณ ํ•œ ๋…ผ๋ๅฉ์€ ์ €์ž‘๊ถŒ๋ฌธ์ œ๋กœ ์ฒจ๋ถ€๋Š” ํ•˜์ง€์•Š์•˜์œผ๋‚˜, ๋ชฉ๋ก์€ ์žˆ์œผ๋‹ˆ ๋”ฐ๋กœ ์ฐพ์œผ์‹œ๋ฉด ๋ฉ๋‹ˆ๋‹ค.
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์›Œ๋“œ
์ตœ์ดˆ๋“ฑ๋ก์ผ 2020.12.02 ์ตœ์ข…์ ฟ’์ž‘์ผ 2017.12
15P ๋ฏธ๋้ฉ๋ณด๊ธฐ
์˜์–ด ๋…ผ๋ๅฉ (๋ฆฌ๋ทฐ ๋…ผ๋ๅฉ - High Entropy Alloy)
  • ๋ฏธ๋้ฉ๋ณด๊ธฐ

    ์†Œ๊ฐœ

    ์ œ๊ฐ€ ์กธ์—…ํ•œ ํ•™๊ป“๋Š” ์กธ์—… ์š”๊ฑด์— '์˜์–ด ์ธ์ฆ ์ ์ˆ˜(ex ํ† ์ต800)'์ด ์žˆ๋Š”๊ฒŒ ์•„๋‹ˆ๋ผ, ์—ฌ๋Ÿฌ ์˜์–ด ์ˆ˜์—…์„ ์ˆ˜๊ฐ•ํ•˜๊ณ  passํ•ด์•ผ ์กธ์—…ํ•  ์ˆ˜ ์žˆ๋Š” ๋ฐฉ์‹์ž…๋‹ˆ๋‹ค. ์ตœ์ข… ์ˆ˜์—…์„ ๋“ค์œผ๋ฉด์„œ ์ž‘์„ฑํ•œ ๋ฆฌ๋ทฐ ๋…ผ๋ๅฉ์ž…๋‹ˆ๋‹ค.

    High Entropy Alloy์— ๊ด€ํ•œ 8๊ฐœ์˜ ๋…ผ๋ๅฉ์„ ์ฝ๊ณ , ์ •๋ฆฌํ•œ ๋ฆฌ๋ทฐ ๋…ผ๋ๅฉ์ž…๋‹ˆ๋‹ค.
    ์›Œ๋“œ 15ํŽ˜์ด์งฟ’, 3000๋‹จ์–ด ์ด์ƒ

    ์ฐธ๊ณ ํ•œ ๋…ผ๋ๅฉ์€ ์ €์ž‘๊ถŒ๋ฌธ์ œ๋กœ ์ฒจ๋ถ€๋Š” ํ•˜์ง€์•Š์•˜์œผ๋‚˜, ๋ชฉ๋ก์€ ์žˆ์œผ๋‹ˆ ๋”ฐ๋กœ ์ฐพ์œผ์‹œ๋ฉด ๋ฉ๋‹ˆ๋‹ค.

    ๋ชฉ์ฐจ

    0. Abstract

    1. Introduction
    1.1 Review

    2. Theoretical background
    2.1. Basic concepts of the HEAs
    2.2. Four characteristics of HEAs
    2.2.1. The high entropy effect
    2.2.2. The sluggish diffusion effect
    2.2.3. The severe lattice distortion effect
    2.2.4. The cocktail effect1,12

    3. Properties of the HEAs
    3.1. Mechanical properties
    3.1.1. Deformation twining
    3.1.2. Mechanical properties of the HEAs at high temperature.
    3.1.3 Mechanical properties of the HEAs in the low temperature.
    3.1.4. Corrosion behavior in the HEAs
    3.2. Physical properties
    3.2.1 Electrical properties
    3.2.2 Thermal properties

    4. Discussion
    4.1 Application fields
    4.2 Value
    4.2.1 Economic feasibility
    4.2.2 Possibility
    4.3 Limitation

    5. Conclusion

    6. Reference

    ๋ณธ๋ๅฉ๋‚ด์šฉ

    Abstract

    The high entropy alloys (HEAs) are the latest advanced alloy and have unique properties. Because the HEAs contain the multicomponents, their high entropy stabilizes the solid solution and disturbs the intermetallic compounds. So, they have enhanced mechanical properties in high or low temperatures. Also, they have high corrosion resistance, high electrical resistivity, and low thermal conductivity. Therefore, the HEAs can be used widely in extreme conditions. Last, they have economic feasibility because half of their components are not high-priced elements.

    1. Introduction

    Metals generally canโ€™t have both hardness and ductility. Some metals which have great hardness are brittle, so they can be broken easily. Although other metals have excellent toughness, they are not hard and deformed easily. So, metallurgists developed alloys. Properties of the alloys are controlled by composition, so we can get materials of appropriate properties.

    ์ฐธ๊ณ ์ž๋ฃŒ

    ยท JIEN-WEI YEH, Alloy design strategies and future trends in high-entropy alloys, The Minerals, Metals & Materials Society, 2013
    ยท Zhi Tang, Lu Huang, Wei He, and Peter K. Liaw, Alloying and Processing Effects on the Aqueous Corrosion Behavior of High-Entropy Alloys, Entropy, 2014
    ยท Z.P. Lu a, H. Wang, M.W. Chen, I. Baker, J.W. Yeh, C.T. Liu, and T.G. Nieh, An assessment on the future development of high-entropy alloys, Intermetallics, 2015
    ยท Jinxiong Hou, Min Zhang, Huijun Yang and Junwei Qiao, Deformation Behavior of Al0.25CoCrFeNi High-Entropy Alloy after Recrystallization, Metals, 2017
    ยท Tai M. Yue, Hui Xie, Xin Lin, Haiou Yang and Guanghui Meng, Microstructure of Laser Re-Melted AlCoCrCuFeNi High Entropy Alloy Coatings Produced by Plasma Spraying, Entropy, 2013
    ยท Brian Cantor, Multicomponent and High Entropy Alloys, Entropy, 2014
    ยท Ming-Hung Tsai, Physical Properties of High Entropy Alloys, Entropy, 2013
    ยท Bernd Gludovatz, Anton Hohenwarter, Dhiraj Catoor, Edwin H. Chang, Easo P. George and Robert O. Ritchie, A fracture-resistant high-entropy alloy for cryogenic applications, Science, 2014
    ยท https://en.wikipedia.org/wiki/Crystal_twinning
    ยท https://en.wikipedia.org/wiki/Wiedemann%E2%80%93Franz_law
    ยท http://www.oakleysteel.co.uk/chemical-composition-steel
    ยท S. Ranganathan, Alloyed pleasures: Multimetallic cocktails,Current Science, 2003.
    ยท https://en.wikipedia.org/wiki/Turbine_blade
  • ์ž๋ฃŒํ›„๊ธฐ

    Ai ๋ฆฌ๋ทฐ
    ์งฟ’์‹ํŒ๋งค์ž์˜ ํ•ด๋‹น ์ž๋ฃŒ๋Š” ๊ณผ์ œ๋ฅผ ์ž‘์„ฑํ•˜๋Š” ๋ฐ ํฐ ๋„์›€์ด ๋˜์—ˆ๊ณ , ๋‚ด์šฉ์ด ํ’๋ถ€ํ•˜์—ฌ ๋งŽ์€ ์ •๋ณด๋ฅผ ์–ป์„ ์ˆ˜ ์žˆ์—ˆ์Šต๋‹ˆ๋‹ค. ์ •๋ง ์ถ”์ฒœํ•  ๋งŒํ•œ ์ž๋ฃŒ์ž…๋‹ˆ๋‹ค.
    • ์ž์ฃผ๋ฌป๋Š”์งˆ๋ๅฉ์˜ ๋‹ต๋ณ€์„ ํ™•์ธํ•ด ์ฃผ์„ธ์š”

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      ๊ผญ ์•Œ์•„์ฃผ์„ธ์š”

      • ์ž๋ฃŒ์˜ ์ •๋ณด ๋ฐ ๋‚ด์šฉ์˜ ์ง„์‹ค์„ฑ์— ๋Œ€ํ•˜์—ฌ ํ•ดํ”ผ์บ ํผ์Šค๋Š” ๋ณด์ฆํ•˜์ง€ ์•Š์œผ๋ฉฐ, ํ•ด๋‹น ์ •๋ณด ๋ฐ ๊ฒŒ์‹œ๋ฌผ ์ €์ž‘๊ถŒ๊ณผ ๊ธฐํƒ€ ๋ฒ•์  ์ฑ…์ž„์€ ์ž๋ฃŒ ๋“ฑ๋ก์ž์—๊ฒŒ ์žˆ์Šต๋‹ˆ๋‹ค.
        ์ž๋ฃŒ ๋ฐ ๊ฒŒ์‹œ๋ฌผ ๋‚ด์šฉ์˜ ๋ถˆ๋ฒ•์  ์ด์šฉ, ๋ฌด๋‹จ ์ „์žฌโˆ™๋ฐฐํฌ๋Š” ๊ธˆ์ง€๋˜์–ด ์žˆ์Šต๋‹ˆ๋‹ค.
        ์ €์ž‘๊ถŒ์นจํ•ด, ๋ช…์˜ˆํ›ผ์† ๋“ฑ ๋ถ„์Ÿ ์š”์†Œ ๋ฐœ๊ฒฌ ์‹œ ๊ณ ๊ฐ๋น„๋ฐ”์นด์ง€๋…ธ Viva์˜ ์ €์ž‘๊ถŒ์นจํ•ด ์‹ ๊ณ ๋น„๋ฐ”์นด์ง€๋…ธ Viva๋ฅผ ์ด์šฉํ•ด ์ฃผ์‹œ๊ธฐ ๋ฐ”๋ž๋‹ˆ๋‹ค.
      • ํ•ดํ”ผ์บ ํผ์Šค๋Š” ๊ตฌ๋งค์ž์™ฟ’ ํŒ๋งค์ž ๋ชจ๋‘๊ฐ€ ๋งŒ์กฑํ•˜๋Š” ์„œ๋น„์Šค๊ฐ€ ๋˜๋„๋ก ๋…ธ๋ ฅํ•˜๊ณ  ์žˆ์œผ๋ฉฐ, ์•„๋ž˜์˜ 4๊ฐ€์ง€ ์ž๋ฃŒํ™˜๋ถˆ ์กฐ๊ฑด์„ ๊ผญ ํ™•์ธํ•ด์ฃผ์‹œ๊ธฐ ๋ฐ”๋ž๋‹ˆ๋‹ค.
        ํŒŒ์ผ์˜ค๋ฅ˜ ์ค‘๋ณต์ž๋ฃŒ ์ €์ž‘๊ถŒ ์—†์Œ ์„ค๋ช…๊ณผ ์‹ค์ œ ๋‚ด์šฉ ๋ถˆ์ผ์น˜
        ํŒŒ์ผ์˜ ๋‹ค์šด๋กœ๋“œ๊ฐ€ ์ œ๋Œ€๋กœ ๋˜์ง€ ์•Š๊ฑฐ๋‚˜ ํŒŒ์ผํ˜•์‹์— ๋งž๋Š” ํ”„๋กœ๊ทธ๋žจ์œผ๋กœ ์ •์ƒ ์ž‘๋™ํ•˜์ง€ ์•Š๋Š” ๊ฒฝ์šฐ ๋‹ค๋ฅธ ์ž๋ฃŒ์™ฟ’ 70% ์ด์ƒ ๋‚ด์šฉ์ด ์ผ์น˜ํ•˜๋Š” ๊ฒฝ์šฐ (์ค‘๋ณต์ž„์„ ํ™•์ธํ•  ์ˆ˜ ์žˆ๋Š” ๊ทผ๊ฑฐ ํ•„์š”ํ•จ) ์ธํ„ฐ๋„ท์˜ ๋‹ค๋ฅธ ์‚ฌ์ดํŠธ, ์—ฐ๊ตฌ๊ธฐ๊ด€, ํ•™๊ป“, ์„œ์  ๋“ฑ์˜ ์ž๋ฃŒ๋ฅผ ๋„์šฉํ•œ ๊ฒฝ์šฐ ์ž๋ฃŒ์˜ ์„ค๋ช…๊ณผ ์‹ค์ œ ์ž๋ฃŒ์˜ ๋‚ด์šฉ์ด ์ผ์น˜ํ•˜์ง€ ์•Š๋Š” ๊ฒฝ์šฐ
    ๋ฌธ์„œ ์ดˆ์•ˆ์„ ์ƒ์„ฑํ•ด์ฃผ๋Š” EasyAI
    ์•ˆ๋…•ํ•˜์„ธ์š”. ํ•ดํ”ผ์บ ํผ์Šค์˜ ๋ฐฉ๋Œ€ํ•œ ์ž๋ฃŒ ์ค‘์—์„œ ์„ ๋ณ„ํ•˜์—ฌ ๋‹น์‹ ๋งŒ์˜ ์ดˆ์•ˆ์„ ๋งŒ๋“ค์–ด์ฃผ๋Š” EasyAI ์ž…๋‹ˆ๋‹ค.
    ์ €๋Š” ์•„๋ž˜์™ฟ’ ๊ฐ™์ด ์ž‘์—…์„ ๋„์™ฟ’๋“œ๋ฆฝ๋‹ˆ๋‹ค.
    - ์ฃผ์ œ๋งŒ ์ž…๋ ฅํ•˜๋ฉด ๋ชฉ์ฐจ๋ถ€ํ„ฐ ๋ณธ๋ๅฉ๋‚ด์šฉ๊นŒ์ง€ ์ž๋™ ์ƒ์„ฑํ•ด ๋“œ๋ฆฝ๋‹ˆ๋‹ค.
    - ์žฅ๋ฌธ์˜ ์ฝ˜ํ…์ธ ๋ฅผ ์‰ฝ๊ณ  ๋น ๋ฅด๊ฒŒ ์ž‘์„ฑํ•ด ๋“œ๋ฆฝ๋‹ˆ๋‹ค.
    - ์Šคํ† ์–ด์—์„œ ๋ฌด๋ฃŒ ์บ์‹œ๋ฅผ ๊ณ„์ •๋ณ„๋กœ 1ํšŒ ๋ฐœ๊ธ‰ ๋ฐ›์„ ์ˆ˜ ์žˆ์Šต๋‹ˆ๋‹ค. ์ง€๊ธˆ ๋ฐ”๋กœ ์ฒดํ—˜ํ•ด ๋ณด์„ธ์š”!
    ์ด๋Ÿฐ ์ฃผ์ œ๋“ค์„ ์ž…๋ ฅํ•ด ๋ณด์„ธ์š”.
    - ์œ ์•„์—๊ฒŒ ์ ํ•ฉํ•œ ๋ฌธํ•™์ž‘ํ’ˆ์˜ ๊ธฐ์ค€๊ณผ ํŠน์„ฑ
    - ํ•œ๊ตญ์ธ์˜ ๊ฐ€์น˜๊ด€ ์ค‘์—์„œ ์ •์‹ ์  ๊ฐ€์น˜๊ด€์„ ์ด๋ฃจ๋Š” ๊ฒƒ๋“ค์„ ๋ฌธํ™”์  ๋ฌธ๋ฒ•์œผ๋กœ ์ •๋ฆฌํ•˜๊ณ , ํ˜„๋Œ€ํ•œ๊ตญ์‚ฌํšŒ์—์„œ ์ผ์–ด๋‚˜๋Š” ์‚ฌ๊ฑด๊ณผ ์‚ฌ๊ณ ๋ฅผ ๋น„๊ตํ•˜์—ฌ ์ž์‹ ์˜ ์˜๊ฒฌ์œผ๋กœ ๊ธฐ์ˆ ํ•˜์„ธ์š”
    - ์ž‘๋ณ„์ธ์‚ฌ ๋…ํ›„๊ฐ
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