共晶高熵合金的研究进展

doi:10.11896/cldb.19110176

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Abstract As the earliest alloy in human history, the invention of bronze opened a new chapter in the history of metal smelting. There are more than 30 practical alloy systems that have been used for industrial sectors so far. Eutectic alloys, such as steel (Fe-C), Al-Si alloy, Ag-Cu alloy, have been widely used because of special properties such as low melting point and good fluidity.
High entropy alloys are known as one of the three major breakthroughs in alloying theory in recent decades. Theoretically, more than 7 000 high entropy alloy systems can be designed from 13 kinds of arbitrarily selected common elements. Compared with traditional alloys that based on one element, the design space of high entropy alloys are much larger. Moreover, it is found that high entropy alloys can form simple microstructures such as a simple face-centered cubic, single body-centered cubic or face-centered cubic and body-centered cubic while conventional alloys gene-rally form complex intermetallic compounds. Hence, high entropy alloys owe high strength, high wear resistance, high corrosion resistance and other excellent properties. Specific performance changes can be achieved by controlling the composition of high entropy alloys to meet different design needs, so high entropy alloys have great research value and application space.
Eutectic high entropy alloys (EHEAs) have composition characteristics of eutectic alloys and high entropy alloys. EHEAs have gained extensive attention in recent years because of the super strength, plasticity, resistance to friction and corrosion. So far, a variety of new eutectic high entropy alloys have been successfully prepared. The scholars have carried out in-depth research on the growth mechanism and strengthening mechanism of the first eutectic high entropy alloy AlCoCrFeNi_2.1 designed by Professor Yiping Lu. EHEAs have gained extensive attention in recent years because of the super strength, plasticity, resistance to friction and corrosion. In this paper, the production of eutectic EHEAs is briefly described, and the achievements are reviewed. Moreover, the composition design, preparation method and studies about EHEAs' properties are mainly introduced, and the prospects for their future development are discussed.

Key words： eutectic high entropy alloy composition design preparation method property

Published: 02 September 2020

CLC number:

TG131

Fund:National Natural Science Foundation of China(51571118, 51371098)

About author:: Sirui Huang received a B.S. degree in engineering science from Nanjing Agricultural University in June 2019. Now she is a Ph.D. student of Nanjing University of Science and Technology Materials Science and Engineering, under the guidance of Prof. Heguo Zhu. Her research has focused on high entropy alloy composite materials.
Heguo Zhu received his first B.S. in Wuhan University of Technology in 1990. And then he received his second B.S., M.S., and Ph.D. degrees from Southeast University in 1994, 1998, and 2003, respectively. Now he is a Professor and Ph.D. supervisor in Nanjing University of Science and Technology. His research interests are metal matrix composites including aluminum matrix, copper matrix, iron matrix, tatinum matrix and other intermetallic compound matrix such as NiAl and TiAl etc.

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Cite this article:

HUANG Sirui,WU Hao,ZHU Heguo. Research Progress on Eutectic High Entropy Alloys[J]. Materials Reports, 2020, 34(17): 17077-17081.

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http://www.mater-rep.com/EN/10.11896/cldb.19110176 OR http://www.mater-rep.com/EN/Y2020/V34/I17/17077

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