期刊
出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.msea.2019.01.073
关键词
Tensile tests; Electron microscopy; Nanocrystalline; High entropy alloy; Bimodal microstructures
类别
资金
- Austrian Science Fund FWF [P26729-N19]
- European Research Council under ERC Grant [340185 USMS]
- Austrian Science Fund (FWF) [P26729] Funding Source: Austrian Science Fund (FWF)
The feasibility of engineering bimodal grain size distributions to achieve superior mechanical properties was explored in two face-centered cubic compositionally complex alloys, namely CrMnFeCoNi and its high-performance subvariant CrCoNi. Therefore both alloys were processed down to the nanocrystalline grain size regime by utilizing high-pressure torsion and subsequently annealed at intermediate temperatures. Especially the CrCoNi alloy is prone to formation of bimodal microstructures and for an annealing treatment at 500 degrees C for 100 h an excellent combination of ultra-high tensile strength, exceeding 1500 MPa, and decent ductility with elongations to failure of 10% could be achieved.
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