A particle reinforced NbTaTiV refractory high entropy alloy based composite with attractive mechanical properties

被引：35

作者：

Fu, Ao ^{[1
]}

Guo, Wenmin ^{[1
]}

Liu, Bin ^{[1
]}

Cao, Yuankui ^{[1
]}

Xu, Liyou ^{[1
]}

Fang, Qihong ^{[2
]}

Yang, Hu ^{[3
]}

Liu, Yong ^{[1
]}

机构：

[1] Cent S Univ, State Key Lab Powder Met, Changsha 410083, Hunan, Peoples R China

[2] Hunan Univ, Coll Mech & Vehicle Engn, Changsha 410082, Hunan, Peoples R China

[3] Yuanmeng Precis Technol Shenzhen Inst, Shenzhen 518055, Guangdong, Peoples R China

来源：

JOURNAL OF ALLOYS AND COMPOUNDS | 2020年 / 815卷

基金：

湖南省自然科学基金; 中国国家自然科学基金;

关键词：

Refractory high entropy alloy; Composite; Sintering temperature; Mechanical property; Strengthening mechanism; PRINCIPAL ELEMENT ALLOYS; DEFORMATION MECHANISMS; PHASE-STABILITY; SOLID-SOLUTION; LOW-DENSITY; MICROSTRUCTURE; PRECIPITATION; BEHAVIORS; STRENGTH;

D O I：

10.1016/j.jallcom.2019.152466

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 high temperature structural materials because of their excellent high temperature strength and high melting point. With introducing secondary particles, the high temperature mechanical properties can be further improved. However, its poor ductility limits the industrial application. In the present work, a new ductile NbTaTiV RHEA-based composite reinforced with Ti-C-O particles were in-situ synthesized through spark plasma sintering (SPS). The composite exhibits excellent room temperature compressive properties with yield strength, ultimate strength and fracture strain of 1760 MPa, 2270 MPa and 11%, respectively. A model is presented to study the strengthening mechanism, and the theoretical calculation shows that the dramatically strength enhancement is mainly due to the in-situ formation of Ti-C-O particles. (C) 2019 Elsevier B.V. All rights reserved.

引用

页数：9

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