Journal
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
Volume 805, Issue -, Pages -Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.msea.2020.140548
Keywords
Dislocation; High-entropy alloys; Mechanical properties; Stacking fault; Twinning
Categories
Funding
- National Key Research and Development Program of China [2017YFA0403803, 2019YFA0209901, 2018YFA0702901]
- Special Fund for Research on National Major Research Instrument [51927801]
- fund of the State Key Laboratory of Solidification Processing in NWPU [SKLSP201902]
- Liao Ning Revitalization Talents Program [XLYC1807047]
- National MCF Energy RD Program [2018YFE0312400]
- Fund of Science and Technology on Reactor Fuel and Materials Laboratory [STRFML-2020-04]
Ask authors/readers for more resources
The high-entropy alloys Co29Cr29Fe29Ni12.5W0.5 prepared by vacuum induction melting and mechanical processing exhibited outstanding mechanical properties with a yield strength of 1.13 GPa and fracture elongation of 24.3% after annealing at 725 degrees C. The addition of W element and ultrafine grain structure were attributed to the excellent mechanical properties observed in the alloy.
Nonequiatomic Co29Cr29Fe29Ni12.5W0.5 high-entropy alloys (HEAs) were prepared by vacuum induction melting and subsequent mechanical processing. The HEA with face-centered cubic and few hexagonal close-packed structure phases exhibited outstanding mechanical properties. After annealing at 725 degrees C, the yield strength and fracture elongation were 1.13 GPa and 24.3%, respectively. The outstanding mechanical properties were attributed to the addition of the W element and ultrafine grain structure. The results demonstrated that dislocation slip, stacking faults, and nano-twins governed the deformation mechanism, and these defects were responsible for the decrease in the work-hardening rate during the deformation processing in the 725 degrees C-annealed alloy.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available