期刊
JOURNAL OF ALLOYS AND COMPOUNDS
卷 686, 期 -, 页码 15-23出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jallcom.2016.05.337
关键词
High-entropy alloy; Severe plastic deformation (SPD); High-pressure torsion; Homogenization; Atom probe tomography
资金
- MOST, China [2012CB932203]
- NSFC, China [51171080]
- MEXT, Japan [26220909]
- Grants-in-Aid for Scientific Research [26220909] Funding Source: KAKEN
The atomic-scale homogenization of a face-centered-cubic-based high-entropy alloy (HEA), Al0.3Cu0.5-CoCrFeNi, using severe plastic deformation (SPD) is reported. Atom probe tomography revealed that water quenching from high temperature cannot produce a homogeneous single phase, and clustering of Cu, Al and Ni still exists. Subsequent processing by high-pressure torsion produced nanostructured non-equilibrium single phase with homogeneous elemental distribution at atomic scale. Importantly, such a non-equilibrium single phase is stable at room temperature due to the sluggish diffusion kinetics. These observations suggest that SPD is an effective approach for producing single-phase HEAs for fundamental studies and applications. (C) 2016 Elsevier B.V. All rights reserved.
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