轻质高熵合金研究现状

doi:10.11896/cldb.20040207

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Abstract High-entropy alloy has attracted masses of attention due to its unique alloy design concept and excellent properties. The previous high-entropy alloys, whose density is relatively high, are mainly based on transition group elements, refractory elements or rare earth elements, which greatly limits their application. With the trend of material lightweight, the research on light-weight high-entropy alloys are gradually increasing. Light-weight high-entropy alloy is a new branch of high-entropy alloy based on light elements such as Al, Li, Mg, Ti, etc. Light-weight high-entropy alloys have unique advantages of low density, low modulus, high specific strength and high specific hardness. In addition, light-weight high-entropy alloys also have high strength, high hardness, excellent wear resistance, good oxidation resistance, excellent corrosion resistance, good high temperature oxidation resistance, high temperature softening resistance and good biocompatibility. The superior properties of light-weight high-entropy alloys have significant potential to be applied to aerospace and biotechnology.
At present, the research of light-weight high-entropy alloys mainly involve the development of composition, preparation, characterization and properties. The development and design of new components mainly use the method of combination of empirical parameters, CALPHAD and DFT (Density functional theory) calculation. The main methods of alloys preparation are induction melting, arc melting and mechanical alloying. The phase composition and structure of light-weight high-entropy alloys usually include amorphous structure, single-phase polycrystalline structure, multiphase complex structure, etc. The research of performance mainly involves mechanical properties, include strength, hardness, high tempe-rature creep, etc., and also includes oxidation resistance, corrosion resistance, biocompatibility, etc. In this paper, the composition design, pre-paration, microstructure and properties of light-weight high-entropy alloy are reviewed. Meanwhile, the problems and challenges for light-weight high-entropy alloy are prospected.

Key words： light-weight high-entropy alloy low density microstructure mechanical properties

Published: 02 September 2020

CLC number:

TB31

About author:: Yuefei Jia, received his bachelor's degree from Heilongjiang University of science and technology in 2016, and master's degree from Shanghai University in 2019. At present, he is a Ph.D. candidate in materials science of Shanghai University following the guidance of Professor Gang Wang. The research interest is material lightweight, committed to the development of low density and high-performance alloys. At present, the main work are the composition design, the relationship between phase composition and phase transformation, and the relationship between microstructure and mechanical properties.
Gang Wang received his Bachelor (1999), Master (2001) and Doctoral (2005) degrees from Harbin Institute of Technology, China. After that, he did postdoctoral research in the Institute of physics, Chinese Academy of Sciences and Hong Kong Polytechnic University(China). In 2008, he was supported by Humboldt scholars and worked in Leibniz solid state institute in Dresden, Germany. In 2010, he took up a professor position at Shanghai University, China, where he worked until now. He was awarded China National Funds for Distinguished Young Scientists from NSFC in 2019 and Excellent Young Scientist project from NSFC in 2013. He was also awarded an Eastern Scholarship at Shanghai University in 2013 from Shanghai Municipal. He has published more than 170 journal papers in the field of materials science. At present, the main research directions are: the effect of ion irradiation on the surface of amorphous alloy; the in-situ deformation behavior and structural transformation at low temperature (liquid nitrogen temperature region) of amorphous alloy studied by high-energy synchrotron radiation; elastic-plastic deformation behavior of amorphous alloy, especially the elastic-plastic deformation service behavior in a wide temperature range (liquid nitrogen temperature range); fracture damage and impact behavior of glass materials; correlation between the structure and deformation of high-entropy alloys.

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	JIA Yuefei
	WANG Gang
	JIA Yandong
	WU Shiwei
	MU Yongkun
	XU Long
	ZHANG Liangbo
	XU Liming

Cite this article:

JIA Yuefei,WANG Gang,JIA Yandong, et al. Light-weight High-entropy Alloy: a Review[J]. Materials Reports, 2020, 34(17): 17003-17017.

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http://www.mater-rep.com/EN/10.11896/cldb.20040207 OR http://www.mater-rep.com/EN/Y2020/V34/I17/17003

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