A novel corrosion resistant NiFeCrAlTi eutectic high entropy alloy with high strength and ductility

被引：0
|
作者：
Zhai, Chenyu [1 ]
Yang, Zhimin [1 ]
Feng, Shilin [1 ]
Cai, Yongfu [1 ]
Han, Zhenhua [2 ]
Wang, Hongyan [3 ]
Chen, Chen [1 ]
Wang, Tan [1 ]
Wu, Shaojie [1 ]
Li, Haimei [1 ]
Wei, Ran [1 ]
机构：
[1] Zhengzhou Univ, Sch Mat Sci & Engn, Zhengzhou 450001, Peoples R China
[2] Xian Univ Technol, Sch Mat Sci & Engn, Xian 710048, Peoples R China
[3] Zhengzhou Univ Aeronaut, Sch Mat Sci & Engn, Zhengzhou 450046, Peoples R China
来源：
MATERIALS CHARACTERIZATION | 2024年 / 218卷
基金：
中国国家自然科学基金;
关键词：
Eutectic high entropy alloys; Mechanical properties; Microstructure; Deformation mechanism; Kurdjumov-Sachs (K-S);
D O I：
10.1016/j.matchar.2024.114479
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
We present a novel corrosion resistant Ni42.6Fe24.6Cr16.4Al13.4Ti3 eutectic high entropy alloy (EHEA), which consists of FCC(L1(2)) phase and BCC(L2(1)) phase. The FCC and BCC phases contain numerous nano-precipitates, with sizes of similar to 10 nm and 80 nm, respectively. The as-cast EHEA exhibits exceptional mechanical properties with a yield strength of similar to 730 MPa, an ultimate tensile strength of 1220 MPa and elongation of 25 %, surpassing those observed in other as-cast EHEAs. The excellent mechanical properties are attributed to the extensive dislocation activities and precipitation strengthening in both BCC and FCC phases, as well as hetero-deformation induced (HDI) strengthening. Besides, the Kurdjumov-Sachs (KS) orientation relationship between adjacent phases promotes the cooperative deformation of both constituent phases, thereby enhancing the ductility of the EHEA.
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页数：9
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