The BCC/B2 Morphologies in AlxNiCoFeCr High-Entropy Alloys

被引：169

作者：

Ma, Yue ^{[1
]}

Jiang, Beibei ^{[1
]}

Li, Chunling ^{[1
]}

Wang, Qing ^{[1
]}

Dong, Chuang ^{[1
]}

Liaw, Peter K. ^{[2
]}

Xu, Fen ^{[3
]}

Sun, Lixian ^{[3
]}

机构：

[1] Dalian Univ Technol, Sch Mat Sci & Engn, Minist Educ, Key Lab Mat Modificat Laser Ion & Electron Beams, Dalian 116024, Peoples R China

[2] Univ Tennessee, Dept Mat Sci & Engn, Knoxville, TN 37996 USA

[3] Guilin Univ Elect Technol, Sch Mat Sci & Engn, Guangxi Collaborat Innovat Ctr Struct & Property, Guangxi Key Lab Informat Mat, Guilin 541004, Peoples R China

来源：

METALS | 2017年 / 7卷 / 02期

基金：

美国国家科学基金会; 中国国家自然科学基金; 对外科技合作项目（国际科技项目）;

关键词：

high-entropy alloys; Al-Ni-Co-Fe-Cr alloys; microstructure; precipitation morphology; mechanical property; MECHANICAL-PROPERTIES; SOLID-SOLUTION; MICROSTRUCTURE; PHASE; PRECIPITATION; ALUMINUM; MN; B2;

D O I：

10.3390/met7020057

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The present work primarily investigates the morphological evolution of the body-centered-cubic (BCC)/B2 phases in AlxNiCoFeCr high-entropy alloys (HEAs) with increasing Al content. It is found that the BCC/B2 coherent morphology is closely related to the lattice misfit between these two phases, which is sensitive to Al. There are two types of microscopic BCC/B2 morphologies in this HEA series: one is the weave-like morphology induced by the spinodal decomposition, and the other is the microstructure of a spherical disordered BCC precipitation on the ordered B2 matrix that appears in HEAs with a much higher Al content. The mechanical properties, including the compressive yielding strength and microhardness of the AlxNiCoFeCr HEAs, are also discussed in light of the concept of the valence electron concentration (VEC).

引用

页数：12

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