Interstitial nitrogen enhances corrosion resistance of an equiatomic CoCrNi medium-entropy alloy in sulfuric acid solution

Moravčík, Igor; Peighambardoust, Naeimeh Sadat; Motallebzadeh, Amir; Moravcikova-Gouvea, Larissa; Liu, Chang; Prabhakar, J. Manoj; Dlouhý, Ivo; Li, Zhiming

doi:10.1016/j.matchar.2020.110869

Cited by 65 publications

(21 citation statements)

References 40 publications

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“…The existence of C, O, Al, and Ti elements in the oxide may be attributed to metallurgical contamination from impurities inside the industrial‐grade raw metals. [ 25 ]…”

Section: Resultsmentioning

confidence: 99%

Study on the microstructure and corrosion behavior of CoCrNi MEA annealed at different temperatures in Na₂CO₃/NaHCO₃ solution

Zhang

Zhu

Yuan

et al. 2022

Materials & Corrosion

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The effect of different annealing temperatures on the corrosion behavior of CoCrNi medium entropy alloy (MEA) was investigated in an alkaline soil simulation solution. The results show the corrosion resistance of the MEA gradually increases with increasing annealing temperature. The corrosion behavior of the MEA is correlated with grain size, oxide inclusions, and surface passive film. With an increasing grain size, the proportion of grain boundaries decreases, which improves its corrosion resistance. The microgalvanic corrosion cell exists between the oxide and its surrounding matrix, which promotes the occurrence of pitting corrosion. As the annealing temperature increases, the film formed on the MEA surface becomes more complete and dense, greatly increasing the corrosion resistance of the MEA.

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“…The existence of C, O, Al, and Ti elements in the oxide may be attributed to metallurgical contamination from impurities inside the industrial‐grade raw metals. [ 25 ]…”

Section: Resultsmentioning

confidence: 99%

Study on the microstructure and corrosion behavior of CoCrNi MEA annealed at different temperatures in Na₂CO₃/NaHCO₃ solution

Zhang

Zhu

Yuan

et al. 2022

Materials & Corrosion

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“…Moravcik et al [59] attributed the strengthening effect to the increment in the elastic misfit and the associated dislocation interaction strength. Some researchers have subjected the molten alloy to a N 2 atmosphere for N addition [133,134] . N 2 gas was flowed for 24 h to saturate the alloy homogenously.…”

Section: Interstitial Elements (B C N and Si)mentioning

confidence: 99%

“…Thus, it hindered the grain growth via the Zener pinning pressure. It was also investigated that lower annealing temperatures with a large fraction of fine-sized Cr 2 N resulted in a higher Zener pinning pressure [134] . Apart from improving the mechanical properties, the addition of N also improved the corrosion resistance of the alloy [135] .…”

Section: Interstitial Elements (B C N and Si)mentioning

confidence: 99%

A critical review of the mechanical properties of CoCrNi-based medium-entropy alloys

Xu¹,

Wang²,

Li³

et al. 2022

Microstructures

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The CoCrFeMnNi alloy is one of the most notable first-generation high-entropy alloys and is also known as a Cantor alloy. This alloy was first proposed in 2004 and shows promising performance at cryogenic temperatures (CTs). Subsequent research has indicated that the equiatomic ternary CoCrNi medium-entropy alloy (MEA), as a subset of the Cantor alloy family, has better mechanical properties than the CoCrFeMnNi alloy. Interestingly, both the strength and ductility of the CoCrNi MEA are higher at CTs than at room temperature. CoCrNi-based alloys have attracted considerable attention in the metallic materials community and it is therefore important to generalize and summarize the latest progress in CoCrNi-based MEA research. The present review initially briefly introduces the discovery of the CoCrNi MEA. Subsequently, its tensile response and deformation mechanisms are summarized. In particular, the effects of parameters, such as critical resolved shear stress, stacking fault energy and short-range ordering, on the deformation behavior are discussed in detail. The methods for strengthening the CoCrNi MEA are then reviewed and divided into two categories, namely, modifying microstructures and adjusting chemical compositions. In addition, the mechanical performance of CoCrNi-based MEAs, including their dynamic shear properties, creep behavior and fracture toughness, is also deliberated. Finally, the development prospects of CoCrNi-based MEAs are proposed.

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“…They found that the alloy had a similar behaviour to stainless steel in NaCl and that the addition of Cu to the alloy was detrimental due to formation of segregated Cu-rich areas, with a lower corrosion resistance. CoCrFeNi have been extensively studied since then [37][38][39][40], and the addition of other elements such as Al [32,37,38,[41][42][43], Mn [44] and Cu [32] have been reported. Results from these studies consistently show that CoCrFeNi has a high corrosion resistance, similar to stainless steels 304L and 316L, attributed to the formation of a protective Cr rich passive film.…”

Section: Multicomponent Alloysmentioning

confidence: 99%

Catalytically active and corrosion resistant cobalt-based thin films

Linder

2022

Linköping Studies in Science and Technology. Licentiate Thesis

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Interstitial nitrogen enhances corrosion resistance of an equiatomic CoCrNi medium-entropy alloy in sulfuric acid solution

Cited by 65 publications

References 40 publications

Study on the microstructure and corrosion behavior of CoCrNi MEA annealed at different temperatures in Na₂CO₃/NaHCO₃ solution

Study on the microstructure and corrosion behavior of CoCrNi MEA annealed at different temperatures in Na₂CO₃/NaHCO₃ solution

A critical review of the mechanical properties of CoCrNi-based medium-entropy alloys

Catalytically active and corrosion resistant cobalt-based thin films

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Interstitial nitrogen enhances corrosion resistance of an equiatomic CoCrNi medium-entropy alloy in sulfuric acid solution

Cited by 65 publications

References 40 publications

Study on the microstructure and corrosion behavior of CoCrNi MEA annealed at different temperatures in Na2CO3/NaHCO3 solution

Study on the microstructure and corrosion behavior of CoCrNi MEA annealed at different temperatures in Na2CO3/NaHCO3 solution

A critical review of the mechanical properties of CoCrNi-based medium-entropy alloys

Catalytically active and corrosion resistant cobalt-based thin films

Contact Info

Product

Resources

About

Study on the microstructure and corrosion behavior of CoCrNi MEA annealed at different temperatures in Na₂CO₃/NaHCO₃ solution

Study on the microstructure and corrosion behavior of CoCrNi MEA annealed at different temperatures in Na₂CO₃/NaHCO₃ solution