Journal
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
Volume 831, Issue -, Pages -Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.msea.2021.142281
Keywords
High-entropy alloys; Fatigue; Slip irreversibility; Deformation mechanisms
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Funding
- National Natural Science Foundation of China (NSFC) [52071319]
- Foundation for Outstanding Young Scholar - Institute of Metal Research (IMR)
- Foundation for Outstanding Young Scholar - Shenyang National Laboratory for Materials Science [L2019F23]
- Fundamental Research Project of Shenyang National Laboratory for Materials Science [L2019R18]
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The study found that adding Al can improve the fatigue resistance of CoCrFeMnNi-based high-entropy alloy thin foils, reduce cyclic strain localization, and delay the propagation of fatigue cracks.
Fatigue behaviors of the CoCrFeMnNi-based high-entropy alloy thin foils with different Al addition were investigated under dynamical bending fatigue loading. The results reveal that the Al addition can effectively decrease the cyclic strain localization and improve the fatigue resistance, which is associated with the reduced cyclic slip irreversibility. The physical reasons for such reduction can be attributed to the enhanced planar-slip ability induced by Al addition. Furthermore, the formation of BCC phases caused by 10 at.% Al addition also leads to a delay in the fatigue crack propagation.
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