A novel ultra-high-strength duplex Al-Co-Cr-Fe-Ni high-entropy alloy reinforced with body-centered-cubic ordered-phase particles

被引：23
作者：
Lim, Ka Ram [1 ]
Kwon, Heoun Jun [1 ]
Kang, Joo-Hee [2 ]
Won, Jong Woo [1 ]
Na, Young Sang [1 ]
机构：
[1] KIMS, Adv Met Div, 797 Changwondaero, Chang Won 51508, Gyeongnam, South Korea
[2] KIMS, Mat Testing & Reliabil Div, 797 Changwondaero, Chang Won 51508, Gyeongnam, South Korea
来源：
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING | 2020年 / 771卷
基金：
新加坡国家研究基金会;
关键词：
Casting; Microscopy and microanalysis techniques; High-entropy alloys; Tension testing; Phase transformations; STAINLESS-STEEL; MECHANICAL-PROPERTIES; MICROSTRUCTURE; TENSILE; BEHAVIORS; STABILITY; DESIGN; HEAT;
D O I：
10.1016/j.msea.2019.138638
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
A duplex alloy structure is advantageous for overcoming the strength-ductility trade-off dilemma. In this paper, we introduce a novel duplex Al12.9Co20.9Cr27.3Pc23.9Ni14.9 high-entropy alloy (HEA) reinforced with bodycentered-cubic ordered-phase (B2) particles. The hierarchical duplex structure results in an excellent tensile strength of 1031 MPa and acceptable tensile ductility, and the alloy outperforms its conventional counterparts. The yield strength of the alloy is much higher than those of transformation-induced-plasticity strengthened and eutectic duplex HEAs, because it is based on the body-centered-cubic disordered-phase (BCC) matrix. The findings of the present study provide novel guidance for the development of multi-phase HEAs.
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页数：7
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