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.

引用

页数：9

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