The role of trace Nb in enhancing the strength-ductility combination of a Ni2CoCrFe-based high-entropy alloy via thermo-mechanical processing

被引：7
作者：
Man, Jiale [1 ]
Wu, Baolin [2 ,4 ]
Duan, Guosheng [2 ]
Zhang, Lu [2 ]
Wan, Gang [2 ]
Zhang, Li [2 ]
Jin, Wenhan [2 ]
Liu, Yandong [1 ]
Esling, Claude [3 ]
机构：
[1] Northeastern Univ, Key Lab Anisotropy & Texture Mat, Minist Educ, Shenyang 110819, Peoples R China
[2] Shenyang Aerosp Univ, Sch Mat Sci & Engn, Shenyang 110136, Peoples R China
[3] Univ Lorraine, UMR CNRS 7239, LEM3, Technopole 7 Rue Felix Savart, F-57073 Metz 03, France
[4] Shenyang Aerosp Univ, Sch Mat Sci & Engn, South Ave Daoyi, Shenyang 110136, Peoples R China
来源：
MATERIALS CHARACTERIZATION | 2023年 / 200卷
关键词：
High entropy alloy; Geometrical close-packed phase; Topological close-packed phase; Thermo-mechanical processing; Strength-ductility combination; MONTE-CARLO-SIMULATION; MECHANICAL-PROPERTIES; MICROSTRUCTURE EVOLUTION; TENSILE PROPERTIES; GRAIN-GROWTH; AL ADDITION; PHASE; BEHAVIOR; MN;
D O I：
10.1016/j.matchar.2023.112866
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
In the present work, the role of trace Nb was investigated in enhancing the strength-ductility combination of the (Ni2CoCrFe)88.25(WMo)3Al5Ti3Nb0.75 high-entropy alloy. It was found that trace Nb can improve the heteroge-neous microstructure, including the formation of the high-density (Ti, Nb)-rich phase instead of the (Ti, W, Mo)-rich phase, the refinement of sigma and gamma' phases, the production of the large amounts of stacking faults and Lomer-Cottrell locks. The strength-ductility combination of the alloy was enhanced via the improvement of the het-erogeneous microstructure in thermo-mechanical processing. The results suggest that the addition of trace Nb is a promising method for enhancing the strength-ductility combination of this kind of alloys.
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页数：15
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