Journal
INTERMETALLICS
Volume 93, Issue -, Pages 269-273Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.intermet.2017.10.004
Keywords
Stacking fault energy; High-entropy alloys; Twining; Mechanical properties
Categories
Funding
- National Natural Science Foundation of China [51531001, 51671018, 51422101, 51371003, 51671021]
- 111 Project [B07003]
- International S & T Cooperation Program of China [2015DFG52600]
- Program for Changjiang Scholars and Innovative Research Team in University [IRT_14R05]
- Top-Notch Young Talents Program
- Fundamental Research Fund for the Central Universities [FRF-TP-15-004C1]
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The stacking fault energy (SFE) values of several typical face-centered-cubic (fcc) high-entropy alloys (HEAs) were experimentally measured by weak-beam dark-field transmission electron microscopy. It was found that the SFE of the Fe-Co-Ni-Cr-Mn HEA system strongly depends on the SFE of the individual constituents. Specifically, the SFE of this HEA system is closely associated with the Ni concentration in the alloys. Additionally, the lower SFE tends to promote formation of more deformation twins with a smaller thickness under loading, leading to better mechanical properties, especially at low temperatures.
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