Journal
INTERMETALLICS
Volume 102, Issue -, Pages 58-64Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.intermet.2018.07.016
Keywords
High entropy alloys; Strengthening; Microstructure; Mechanical properties; Powder metallurgy
Categories
Funding
- National Natural Science Foundation of China [51671217]
- National key research and development plan of China [2016YFB0700302]
- Project of Innovation and Entrepreneur Team Introduced by Guangdong Province of China [201301G0105337290]
Ask authors/readers for more resources
A carbon-containing FeCoCrNiAl0.5 high entropy alloys (HEAs) with high tensile strength was fabricated by powder metallurgy (P/M) method. The P/M process includes gas atomization and hot extrusion of pre-alloyed HEA powder. The microstructural evolution and mechanical properties were systematically investigated using X-ray diffraction (xRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM) and tensile tests. The results showed that the gas-atomized HEA powder was of dual phase, including face centered cubic (fcc) phase and B2 phase. Hot extrusion caused the precipitation of M23C6 carbides, the formation of dislocations and the refinement of microstructure. The as-extruded HEA exhibited a tensile strength as high as 1093 MPa and an elongation of similar to 12.4%. The contributions of different strengthening mechanisms were quantitatively calculated, and it was found that the grain boundary strengthening and the dislocation strengthening are the main strengthening mechanism.
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