Microstructure and Mechanical Properties Investigation of the CoCrFeNiNbx High Entropy Alloy Coatings
作者： Hui Jiang , Kaiming Han , Dayan Li , Zhiqiang Cao
DOI: 10.3390/CRYST8110409
关键词: Eutectic system 、 Solid solution 、 Composite material 、 Vickers hardness test 、 Substrate (electronics) 、 Laves phase 、 Microstructure 、 Alloy 、 Lamellar structure 、 Materials science
摘要: In this work, the CoCrFeNiNbx (x: molar ratio, x = 0.45, 0.5, 0.75, and 1.0) high entropy alloy coatings were synthesized on a 304 stainless steel substrate by laser cladding to investigate effect of Nb element their microstructure, hardness, wear resistance. The results indicated that in all coatings, two phases found: One was face-centered cubic (FCC) solid solution phase, other Co1.92Nb1.08-type Laves phase. microstructures samples varied from hypoeutectic structure (x 0.45 0.5) hypereutectic 0.75 1.0). Vickers hardness obviously improved compared with substrate. value CoCrFeNiNb1.0 coating reached 590 HV, which 2.8 times higher than There also corresponding variation properties evolutions. Wherein highest exhibited best resistance under same condition, dry test showed mass loss less third considered fine lamellar eutectic proper combination FCC phases.
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