High-entropy alloy strengthened by in situ formation of entropy-stabilized nano-dispersoids

被引：59

作者：

Gwalani, Bharat ^{[1
]}

Pohan, Rizaldy M. ^{[2
]}

Lee, Junho ^{[2
]}

Lee, Bin ^{[3
]}

Banerjee, Rajarshi ^{[1
]}

Ryu, Ho Jin ^{[4
]}

Hong, Soon Hyung ^{[2
]}

机构：

[1] Univ North Texas, Dept Mat Sci & Engn, 1155 Union Circle, Denton, TX 76203 USA

[2] Korea Adv Inst Sci & Technol, Dept Mat Sci & Engn, 291 Daehak Ro, Daejeon 34141, South Korea

[3] Korea Inst Rare Met, Gaetbeol Ro 12, Incheon, South Korea

[4] Korea Adv Inst Sci & Technol, Dept Nucl & Quantum Engn, 291 Daehak Ro, Daejeon 34141, South Korea

来源：

SCIENTIFIC REPORTS | 2018年 / 8卷

基金：

新加坡国家研究基金会;

关键词：

MECHANICAL-PROPERTIES; THERMAL-STABILITY; PHASE-STABILITY; SINGLE-PHASE; HALL-PETCH; MICROSTRUCTURE; EVOLUTION; BEHAVIOR; DESIGN; L1(2);

D O I：

10.1038/s41598-018-32552-6

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

A significant increase in compressive yield strength of the Al0.3CoCrFeMnNi high-entropy alloy (HEA) from 979 MPa to 1759 MPa was observed upon the introduction of 3 vol.%Y2O3. The HEAs were processed using spark plasma sintering of mechanically alloyed powders. Transmission electron microscopy and atom probe tomography confirmed the presence of compositionally complex nano-dispersoids in theY(2)O(3)-added HEA. The significant increase in strength can be attributed to the nano-dispersoid strengthening coupled with grain refinement. Therefore, the in-situ formation of the compositionally complex nanosca le dispersoids during the alloy processing could be a novel approach to create entropy-stabilized oxide particles in strengthening of HEAs.

引用

页数：9

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