Microstructure, mechanical and electrochemical performance of spark plasma sintered CoCrNi medium-entropy alloy
Source abstract
Abstract
In recent years, CoCrNi medium-entropy alloy (MEA) has garnered widespread attention due to its preferable mechanical properties such as good strength-ductility matching and low-temperature fracture toughness. In this work, a homogeneous FCC structured CoCrNi MEA was synthesized by spark plasma sintering (SPS). The mechanical properties and corrosion resistance were investigated. No significant preferred orientation was detected in CoCrNi, and the fractions of high angle grain boundaries and Σ3 twin boundaries were 89.7 % and 53.1 %, respectively. The yield strength, tensile strength and fracture strain were 454 MPa, 910 MPa and 51.6 %, respectively. The superior strength-ductility synergy of the CoCrNi MEA can be attributed to the formation of numerous twins, dislocations and short-range ordered structures. In addition, this alloy presented enhanced wear and corrosion resistance compared with most of the MEAs and stainless steels reported in literatures, exhibiting great application potential in engineering industry.
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Research context
OpenAlex topics: High Entropy Alloys Studies · High-Temperature Coating Behaviors · Advanced materials and composites
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
References (90)
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