期刊
出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.msea.2018.01.045
关键词
High entropy alloys; Deformation-induced twinning; Strain hardening; Interstitial strengthening; Carbon alloying
类别
资金
- National Natural Science Foundation of China (NSFC) [51321003, 51501145]
- National Ministry and Commission [613262]
The effects of carbon content on the microstructure and room-temperature mechanical properties of Fe40Mn40Co10Cr10 high-entropy alloy (HEA) were systematically investigated. The results showed that heavy carbon alloyed HEA could possess supreme combination of high tensile strength (935 MPa) and high ductility (similar to 74%). The excellent mechanical properties were ascribed to as follows: the high content interstitial carbon atoms strengthens the matrix greatly through suppressing dislocation motion and promoting the deformation-induced twinning at room temperature, which enhance the strength and ductility. Simultaneously, the ductility is further secured for single FCC structure maintained due to appropriate carbon alloying. Our findings provide a novel strategy for developing HEAs with excellent mechanical properties.
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