Microstructure and mechanical properties of AlxSi0.2CrFeCoNiCu1 - x high-entropy alloys

被引：56

作者：

Li, Cheng ^{[1
]}

Xue, Yunfei ^{[1
,2
]}

Hua, Mutian ^{[1
]}

Cao, Tangqing ^{[1
]}

Ma, Lili ^{[1
,3
]}

Wang, Lu ^{[1
,2
]}

机构：

[1] Beijing Inst Technol, Sch Mat Sci & Engn, Beijing 100081, Peoples R China

[2] Natl Key Lab Sci & Technol Mat Shock & Impact, Beijing 100081, Peoples R China

[3] Qinghai Univ, Sch Chem Engn, Xining 810016, Peoples R China

来源：

MATERIALS & DESIGN | 2016年 / 90卷

基金：

中国国家自然科学基金;

关键词：

High-entropy alloys; Spinodal decomposition; Microstructure; Strain rate; Mechanical properties; SOLID-SOLUTION; BEHAVIOR; ELEMENTS; SYSTEM; HEAT; NB; TI;

D O I：

10.1016/j.matdes.2015.11.013

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

AlxSi0.2CrFeCoNiCu1 (- x) (x = 0.2, 0.4, 0.5, 0.6, 0.8, 0.9) high-entropy alloys (HEAs) were prepared using vacuum arc melting and injection casting. The microstructures, detailed phases, and strain rate-related mechanical properties of the alloys were investigated. The alloys changed gradually from FCC to coexisting FCC and BCC and then to a BCC solid solution with an increase in the Al content and a decrease in the Cu content. With the Al content increase, the alloys with FCC structures exhibited an increased yield stress but a decreased plasticity. However, the alloys with the BCC structure exhibited both increased strength and plasticity. The improved mechanical properties of alloys are attributed to the combined action of solid-solution strengthening, a decrease in compositional segregation, and fine-grain strengthening. (C) 2015 Elsevier Ltd. All rights reserved.

引用

页码：601 / 609

页数：9

共 39 条

[31] Novel microstructure and properties of multicomponent CoCrCuFeNiTix alloys [J].

Wang, X. F. ;

Zhang, Y. ;

Qiao, Y. ;

Chen, G. L. .

INTERMETALLICS, 2007, 15 (03) :357-362

[32] Microstructure and compressive properties of AlCrFeCoNi high entropy alloy [J].

Wang, Y. P. ;

Li, B. S. ;

Ren, M. X. ;

Yang, C. ;

Fu, H. Z. .

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, 2008, 491 (1-2) :154-158

[33] Nanoscale phase separation in a fcc-based CoCrCuFeNiAl0.5 high-entropy alloy [J].

Xu, X. D. ;

Liu, P. ;

Guo, S. ;

Hirata, A. ;

Fujita, T. ;

Nieh, T. G. ;

Liu, C. T. ;

Chen, M. W. .

ACTA MATERIALIA, 2015, 84 :145-152

[34] Prediction of high-entropy stabilized solid-solution in multi-component alloys [J].

Yang, X. ;

Zhang, Y. .

MATERIALS CHEMISTRY AND PHYSICS, 2012, 132 (2-3) :233-238

[35] Nanostructured high-entropy alloys with multiple principal elements: Novel alloy design concepts and outcomes [J].

Yeh, JW ;

Chen, SK ;

Lin, SJ ;

Gan, JY ;

Chin, TS ;

Shun, TT ;

Tsau, CH ;

Chang, SY .

ADVANCED ENGINEERING MATERIALS, 2004, 6 (05) :299-303

[36] Solid-solution phase formation rules for multi-component alloys [J].

Zhang, Yong ;

Zhou, Yun Jun ;

Lin, Jun Pin ;

Chen, Guo Liang ;

Liaw, Peter K. .

ADVANCED ENGINEERING MATERIALS, 2008, 10 (06) :534-538

[37] Microstructures and properties of high-entropy alloys [J].

Zhang, Yong ;

Zuo, Ting Ting ;

Tang, Zhi ;

Gao, Michael C. ;

Dahmen, Karin A. ;

Liaw, Peter K. ;

Lu, Zhao Ping .

PROGRESS IN MATERIALS SCIENCE, 2014, 61 :1-93

[38] Fabrication and device characteristics of Schottky-type bulk GaN-based "visible-blind" ultraviolet photodetectors [J].

Zhou, Yi ;

Ahyi, Claude ;

Tin, Chin-Che ;

Williams, John ;

Park, Minseo ;

Kim, Dong-Joo ;

Cheng, An-Jen ;

Wang, Dake ;

Hanser, Andrew ;

Preble, Edward A. ;

Williams, N. Mark ;

Evans, Keith .

APPLIED PHYSICS LETTERS, 2007, 90 (12)

[39] Synthesis and properties of multiprincipal component AlCoCrFeNiSix alloys [J].

Zhu, J. M. ;

Fu, H. M. ;

Zhang, H. F. ;

Wang, A. M. ;

Li, H. ;

Hu, Z. Q. .

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, 2010, 527 (27-28) :7210-7214

← 1 2 3 4 →