The Microstructure and Mechanical Properties of Refractory High-Entropy Alloys with High Plasticity

被引：66

作者：

Chen, Yiwen ^{[1
,2
]}

Li, Yunkai ^{[1
,2
]}

Cheng, Xingwang ^{[1
,2
]}

Wu, Chao ^{[1
,2
]}

Cheng, Bo ^{[1
,2
]}

Xu, Ziqi ^{[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

来源：

MATERIALS | 2018年 / 11卷 / 02期

关键词：

RHEAs; alloys design; microstructure and mechanical properties; DESIGN; PHASE;

D O I：

10.3390/ma11020208

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：

Refractory high-entropy alloys (RHEAs) are promising materials used at high temperature, but their low plasticity restricts their application. Based on the valence electron concentration (VEC) principle, four kinds of RHEAs (ZrTiHfV0.5Nb0.5, Zr2.0TiHfVNb2.0, ZrTiHfNb0.5Mo0.5, and ZrTiHfNb0.5Ta0.5) are designed (VEC < 4.5). The experimental results show that the plasticity of these alloys was greatly improved: the static compressive strain was higher than 50% at room temperature (RT), and some elongations were produced in the tensile process. Moreover, the microstructure and phase composition are discussed in detail. The addition of Nb, Mo, and Ta contributed to the high-temperature strength. Finally, the dynamic mechanical properties of these RHEAs with coordination between strength and plasticity are investigated.

引用

收藏

页数：11

相关论文

共 23 条

[1] Microstructural development in equiatomic multicomponent alloys [J].

Cantor, B ;

Chang, ITH ;

Knight, P ;

Vincent, AJB .

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, 2004, 375 :213-218

[2] Oxidation Behavior of Al8Co17Cr17Cu8Fe17Ni33, Al23Co15Cr23Cu8Fe15Ni15, and Al17Co17Cr17Cu17Fe17Ni17 Compositionally Complex Alloys (High-Entropy Alloys) at Elevated Temperatures in Air [J].

Daoud, Haneen M. ;

Manzoni, Anna M. ;

Voelkl, Rainer ;

Wanderka, Nelia ;

Glatzel, Uwe .

ADVANCED ENGINEERING MATERIALS, 2015, 17 (08) :1134-1141

[3] Experimental and theoretical study of Ti20Zr20Hf20Nb20X20 (X = V or Cr) refractory high-entropy alloys [J].

Fazakas, E. ;

Zadorozhnyy, V. ;

Varga, L. K. ;

Inoue, A. ;

Louzguine-Luzgin, D. V. ;

Tian, Fuyang ;

Vitos, L. .

INTERNATIONAL JOURNAL OF REFRACTORY METALS & HARD MATERIALS, 2014, 47 :131-138

[4] Phase equilibria, microstructure, and high temperature oxidation resistance of novel refractory high-entropy alloys [J].

Gorr, B. ;

Azim, M. ;

Christ, H. -J. ;

Mueller, T. ;

Schliephake, D. ;

Heilmaier, M. .

JOURNAL OF ALLOYS AND COMPOUNDS, 2015, 624 :270-278

[5] Microstructure and mechanical properties of refractory MoNbHfZrTi high-entropy alloy [J].

Guo, N. N. ;

Wang, L. ;

Luo, L. S. ;

Li, X. Z. ;

Su, Y. Q. ;

Guo, J. J. ;

Fu, H. Z. .

MATERIALS & DESIGN, 2015, 81 :87-94

[6] Solution strengthening of ductile refractory HfMoxNbTaTiZr high-entropy alloys [J].

Juan, Chien-Chang ;

Tseng, Ko-Kai ;

Hsu, Wei-Lin ;

Tsai, Ming-Hung ;

Tsai, Che-Wei ;

Lin, Chun-Ming ;

Chen, Swe-Kai ;

Lin, Su-Jien ;

Yeh, Jien-Wei .

MATERIALS LETTERS, 2016, 175 :284-287

[7] Predicting the formation and stability of single phase high-entropy alloys [J].

King, D. J. M. ;

Middleburgh, S. C. ;

McGregor, A. G. ;

Cortie, M. B. .

ACTA MATERIALIA, 2016, 104 :172-179

[8] Thermodynamic design of high-entropy refractory alloys [J].

Melnick, A. B. ;

Soolshenko, V. K. .

JOURNAL OF ALLOYS AND COMPOUNDS, 2017, 694 :223-227

[9] A critical review of high entropy alloys and related concepts [J].

Miracle, D. B. ;

Senkov, O. N. .

ACTA MATERIALIA, 2017, 122 :448-511

[10] Anomalies in the response of V, Nb, and Ta to tensile and shear loading: Ab initio density functional theory calculations [J].

Nagasako, Naoyuki ;

Jahnatek, Michal ;

Asahi, Ryoji ;

Hafner, Juergen .

PHYSICAL REVIEW B, 2010, 81 (09)