Microstructures and mechanical properties of CrMnFeCoNi high entropy alloys fabricated using laser metal deposition technique

被引：165

作者：

Xiang, Shuo ^{[1
,2
]}

Luan, Hengwei ^{[3
]}

Wu, Jian ^{[2
]}

Yao, Ke-Fu ^{[3
]}

Li, Jinfeng ^{[2
]}

Liu, Xue ^{[2
]}

Tian, Yanzhong ^{[4
]}

Mao, Wenlue ^{[3
]}

Bai, Hua ^{[3
]}

Le, Guomin ^{[2
]}

Li, Qiang ^{[1
]}

机构：

[1] Xinjiang Univ, Sch Phys Sci & Technol, Urumqi 830046, Xinjiang, Peoples R China

[2] China Acad Engn Phys, Inst Mat, Mianyang 621907, Peoples R China

[3] Tsinghua Univ, Sch Mat Sci & Engn, Beijing 100084, Peoples R China

[4] Chinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, Shenyang 110016, Liaoning, Peoples R China

来源：

JOURNAL OF ALLOYS AND COMPOUNDS | 2019年 / 773卷

基金：

中国国家自然科学基金;

关键词：

Laser metal deposition; Casting; Microstructures; Tensile test; High entropy alloy; HYDROGEN STORAGE PROPERTIES; PHASE; ELEMENTS;

D O I：

10.1016/j.jallcom.2018.09.235

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

In this paper, a laser metal deposition (LMD) process has been applied to the fabrications of CrMnFeCoNi high entropy alloys. The microstructures and mechanical properties of the CrMnFeCoNi alloys prepared using casting technique and LMD technique have been investigated. It has been found that the CrMnFeCoNi samples prepared using casting show a coarse dendritic structure. The microstructures of LMD samples contain both columnar grains and/or equiaxed grains, and the proportion of columnar grains and equiaxed grains can be adjusted by changing the laser power. Besides, the mechanical properties of LMD samples can be adjusted by changing laser power, due to columnar to equiaxed transitions (CET) that are effected by solidification mode and the heat flux direction of LMD process. It is worth to mention that the mechanical properties of the 1400 W samples produced using LMD are better than those produced by casting, which is rarely observed. Furthermore, CrMnFeCoNi alloys prepared using LMD show excellent mechanical properties at cryogenic temperatures. (C) 2018 Elsevier B.V. All rights reserved.

引用

页码：387 / 392

页数：6

共 23 条

[11] Effect of alloying elements on microstructure and properties of multiprincipal elements high-entropy alloys [J].

Li, C. ;

Li, J. C. ;

Zhao, M. ;

Jiang, Q. .

JOURNAL OF ALLOYS AND COMPOUNDS, 2009, 475 (1-2) :752-757

[12] Grain growth and the Hall-Petch relationship in a high-entropy FeCrNiCoMn alloy [J].

Liu, W. H. ;

Wu, Y. ;

He, J. Y. ;

Nieh, T. G. ;

Lu, Z. P. .

SCRIPTA MATERIALIA, 2013, 68 (07) :526-529

[13] The influences of temperature and microstructure on the tensile properties of a CoCrFeMnNi high-entropy alloy [J].

Otto, F. ;

Dlouhy, A. ;

Somsen, Ch. ;

Bei, H. ;

Eggeler, G. ;

George, E. P. .

ACTA MATERIALIA, 2013, 61 (15) :5743-5755

[14] Fabrication of large Ti-6Al-4V structures by direct laser deposition [J].

Qiu, Chunlei ;

Ravi, G. A. ;

Dance, Chris ;

Ranson, Andrew ;

Dilworth, Steve ;

Attallah, Moataz M. .

JOURNAL OF ALLOYS AND COMPOUNDS, 2015, 629 :351-361

[15]

Qiu Z., 2018, Int J Lightweight Mater Manuf, V1, P33, DOI DOI 10.1016/J.IJLMM.2018.02.001

[16] Mechanical properties of Nb25Mo25Ta25W25 and V20Nb20Mo20Ta20W20 refractory high entropy alloys [J].

Senkov, O. N. ;

Wilks, G. B. ;

Scott, J. M. ;

Miracle, D. B. .

INTERMETALLICS, 2011, 19 (05) :698-706

[17] Enhanced strength and ductility of bulk CoCrFeMnNi high entropy alloy having fully recrystallized ultrafine-grained structure [J].

Sun, S. J. ;

Tian, Y. Z. ;

Lin, H. R. ;

Dong, X. G. ;

Wang, Y. H. ;

Zhang, Z. J. ;

Zhang, Z. F. .

MATERIALS & DESIGN, 2017, 133 :122-127

[18] High-Entropy Alloys: A Critical Review [J].

Tsai, Ming-Hung ;

Yeh, Jien-Wei .

MATERIALS RESEARCH LETTERS, 2014, 2 (03) :107-123

[19] Nature of the interfaces between the constituent phases in the high entropy alloy CoCrCuFeNiAl [J].

Welk, Brian A. ;

Williams, Robert E. A. ;

Viswanathan, Gopal B. ;

Gibson, Mark A. ;

Liaw, Peter K. ;

Fraser, Hamish L. .

ULTRAMICROSCOPY, 2013, 134 :193-199

[20] A novel, single phase, non-equiatomic FeMnNiCoCr high-entropy alloy with exceptional phase stability and tensile ductility [J].

Yao, M. J. ;

Pradeep, K. G. ;

Tasan, C. C. ;

Raabe, D. .

SCRIPTA MATERIALIA, 2014, 72-73 :5-8

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