Laves-phase formation criterion for high-entropy alloys

被引：193

作者：

Yurchenko, N. ^{[1
]}

Stepanov, N. ^{[1
]}

Salishchev, G. ^{[1
]}

机构：

[1] Belgorod State Univ, Lab Bulk Nanostruct Mat, Pobeda 85, Belgorod 308015, Russia

来源：

MATERIALS SCIENCE AND TECHNOLOGY | 2017年 / 33卷 / 01期

基金：

俄罗斯科学基金会;

关键词：

High-entropy alloy; Crystal structure; Laves phase; Phase prediction; HYDROGEN-STORAGE PROPERTIES; PRINCIPAL ELEMENT ALLOYS; SOLID-SOLUTION PHASE; CLOSE-PACKED PHASE; MECHANICAL-PROPERTIES; LOW-DENSITY; CR; MICROSTRUCTURE; STABILITY; TI;

D O I：

10.1080/02670836.2016.1153277

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

In this study, we have analysed Laves-phase formation in high-entropy alloys (HEAs). For that purpose, the AlCrxNbTiV and AlxCrNbTiVZr (x=0, 0.5, 1, 1.5) alloys were produced and examined. It was found that the AlNbTiV and AlCr0.5NbTiV alloys had single-phase body-centred cubic structure, while the other alloys contained Laves phase. Analysis has demonstrated that Laves-phase formation in the produced and in the other HEAs, which are predominantly composed of Al and the elements of 4-6 groups and tend to form body-centred cubic solid solutions, can be predicted by the atomic size mismatch,delta(r), and the Allen electronegativity difference, Delta(xAllen), parameters. It was shown that Laves-phase formation is observed when delta(r) > 5.0% and Delta(xAllen)>7.0%.

引用

页码：17 / 22

页数：6

共 50 条

[1] Improvement on the hydrogen storage properties of ZrFe2 Laves phase alloy by vanadium substitution [J].

Banerjee, S. ;

Kumar, Asheesh ;

Pillai, C. G. S. .

INTERMETALLICS, 2014, 51 :30-36

[2] High entropy alloys [J].

Bhadeshia, H. K. D. H. .

MATERIALS SCIENCE AND TECHNOLOGY, 2015, 31 (10) :1139-1141

[3] Microstructure and mechanical properties of Cr-Ta-Si Laves phase-based alloys at elevated temperatures [J].

Bhowmik, Ayan ;

Neumeier, Steffen ;

Barnard, Jon S. ;

Zenk, Christopher H. ;

Goeken, Mathias ;

Rae, Catherine M. F. ;

Stone, Howard J. .

PHILOSOPHICAL MAGAZINE, 2014, 94 (34) :3914-3944

[4] Factors affecting the room-temperature mechanical properties of TiCr2-base Laves phase alloys [J].

Chen, KC ;

Allen, SM ;

Livingston, JD .

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, 1998, 242 (1-2) :162-173

[5]

Clark A. E., 1980, Ferromagnetic materials. A handbook on the properties of magnetically ordered substances, vol.1, P531, DOI 10.1016/S1567-2719(80)01010-4

[6] Effects of electro-negativity on the stability of topologically close-packed phase in high entropy alloys [J].