Dynamic precipitation at elevated temperatures in a dual-phase AlCoCrFeNi high-entropy alloy: an in situ study

被引：10
作者：
Ghassemali, Ehsan [1 ]
Sonkusare, Reshma [2 ]
Biswas, Krishanu [2 ]
Gurao, Nilesh P. [2 ]
机构：
[1] Jonkoping Univ, Sch Engn, POB 1026, S-55111 Jonkoping, Sweden
[2] Indian Inst Technol, Dept Mat Sci & Engn, Kanpur, Uttar Pradesh, India
来源：
PHILOSOPHICAL MAGAZINE LETTERS | 2018年 / 98卷 / 09期
关键词：
AlCoCrFeNi; EBSD; fracture; precipitation; crack propagation; MECHANICAL-PROPERTIES; MICROSTRUCTURE;
D O I：
10.1080/09500839.2018.1563728
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The effect of a possible phase transformation or precipitation of the face-centred cubic (FCC) phase on intermediate-temperature deformation of a dual-phase AlCoCrFeNi high-entropy alloy has been studied using in situ tensile testing at 550 degrees C. Electron backscatter diffraction (EBSD) results showed localised precipitation of the FCC phase during the intermediate-temperature deformation. The overall fracture behaviour and crack propagation of the material was not altered much compared to the room-temperature behaviour, namely brittle trans-granular fracture. Deformation at higher temperatures (above 750 degrees C) is suggested as a way to enhance the dynamic FCC phase precipitation, in order to improve the ductility or deformability of the alloy.
引用
收藏
页码：400 / 409
页数：10
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