Alloy design for intrinsically ductile refractory high-entropy alloys

被引：410

作者：

Sheikh, Saad ^{[1
]}

Shafeie, Samrand ^{[1
]}

Hu, Qiang ^{[2
]}

Ahlstrom, Johan ^{[1
]}

Persson, Christer ^{[1
]}

Vesely, Jaroslav ^{[3
]}

Zyka, Jiri ^{[3
]}

Klement, Uta ^{[1
]}

Guo, Sheng ^{[1
]}

机构：

[1] Chalmers Univ Technol, Dept Mat & Mfg Technol, S-41296 Gothenburg, Sweden

[2] Jiangxi Acad Sci, Inst Appl Phys, Nanchang 330029, Peoples R China

[3] UJP PRAHA As, Nad Kaminkou 1345, Prague 15610, Czech Republic

来源：

JOURNAL OF APPLIED PHYSICS | 2016年 / 120卷 / 16期

关键词：

SOLID-SOLUTION PHASE; MECHANICAL-PROPERTIES; STABILITY;

D O I：

10.1063/1.4966659

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Refractory high-entropy alloys (RHEAs), comprising group IV (Ti, Zr, Hf), V (V, Nb, Ta), and VI (Cr, Mo, W) refractory elements, can be potentially new generation high-temperature materials. However, most existing RHEAs lack room-temperature ductility, similar to conventional refractory metals and alloys. Here, we propose an alloy design strategy to intrinsically ductilize RHEAs based on the electron theory and more specifically to decrease the number of valence electrons through controlled alloying. A new ductile RHEA, Hf0.5Nb0.5Ta0.5Ti1.5Zr, was developed as a proof of concept, with a fracture stress of close to 1 GPa and an elongation of near 20%. The findings here will shed light on the development of ductile RHEAs for ultrahigh-temperature applications in aerospace and power-generation industries. Published by AIP Publishing.

引用

页数：5

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