High creep resistance in amorphous/crystalline dual-phase nanostructured CoCrFeNiMn high entropy alloys

被引：0
作者：
Xiao, Lili [1 ]
Sun, Kai [1 ,2 ]
Pan, Wengao [1 ]
Du, Juan [1 ]
Meng, Zhaojie [1 ]
Zhang, Xinwen [1 ]
Li, Shaolin [3 ]
Yue, Pengfei [1 ]
Zhang, Guoshang [1 ]
Kang, Kejia [4 ]
机构：
[1] Henan Acad Sci, Inst Mat, Zhengzhou 450046, Peoples R China
[2] Zhengzhou Univ, Sch Mat Sci & Engn, Zhengzhou 450001, Peoples R China
[3] Henan Univ Sci & Technol, Sch Mat Sci & Engn, Luoyang 471023, Peoples R China
[4] Henan Univ Technol, Sch Mech & Elect Engn, Zhengzhou 450001, Peoples R China
来源：
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T | 2024年 / 33卷
关键词：
Amorphous/nanocrystalline; High entropy alloy; Creep; Dislocation; Glass shell; STRAIN-RATE SENSITIVITY; GRAIN-SIZE; NANOINDENTATION; TEMPERATURE; NANOCRYSTALLINE; DEFORMATION; BEHAVIOR;
D O I：
10.1016/j.jmrt.2024.10.029
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Amorphous/crystalline dual-phase metallic materials received great attention owing to their synergistic combination of strength and ductility. However, the mechanisms governing creep deformation in these dual-phase materials are largely elusive. In the present letter, the creep deformation of amorphous/nanocrystalline CoCrFeNiMn high-entropy alloy (HEA) films is investigated through nanoindentation creep testing. It is suggested that dual-phase HEAs exhibit reduced creep strain compared to their monophase counterparts, and even surpass the performance of coarse-grained variants. This behavior arises from diffusion processes within the amorphous phase and the capacity for nucleation/annihilate of dislocations at amorphous/nanocrystalline interfaces. Furthermore, it is proposed that the presence of glass shell significantly influences the creep behavior of dualphase HEAs.
引用
收藏
页码：5136 / 5141
页数：6
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