Microstructure and properties of CoCrNi medium-entropy alloy produced by gas atomization and spark plasma sintering

Yang, Hailin; Ruan, Jianming; Wang, Yun; Ji, Shouxun

doi:10.1557/jmr.2019.96

Cited by 40 publications

(12 citation statements)

References 37 publications

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“…Co, Cr, and Ni). Therefore, no evidence for the development of intermetallic compounds was seen which is also consistent with the literature (Wang et al, 2019;Zhu et al, 2021).…”

Section: Preparation Of Cocrni (Mea)supporting

confidence: 90%

“…Considering the importance of this novel class of material, researchers also focused on their corrosion behavior. Wang et al (2019) prepared CoCrNi MEA and evaluated its corrosion behavior in both 1 mol/L NaOH and 0.5 mol/L HCl solutions. He found that NiCoCr MEA offered high corrosion resistance than SUS 304 steel in both environments (Wang et al, 2019).…”

Section: Introductionmentioning

confidence: 99%

“…Wang et al (2019) prepared CoCrNi MEA and evaluated its corrosion behavior in both 1 mol/L NaOH and 0.5 mol/L HCl solutions. He found that NiCoCr MEA offered high corrosion resistance than SUS 304 steel in both environments (Wang et al, 2019). An, X, L. et al conducted an electrochemical test on CoNiFe MEA and found that the corrosion rate increased at a higher temperature of NaCl and H 2 SO 4 solution (An et al, 2019).…”

Section: Introductionmentioning

confidence: 99%

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Evaluation of nano mechanical properties and corrosion behavior of diffusion welded CoCrNi medium-entropy alloy (MEA) and SUS 304 stainless steel joints

Samiuddin,

Li,

Farooq

et al. 2023

Rev. metal.

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The study mainly focused on examining nanomechanical properties and corrosion behavior of the weld interface formed by diffusion welding of CoCrNi MEA and SUS 304 stainless steel. Three different bonding temperatures (i.e. 950 °C, 1000 °C, and 1050 °C) were utilized in producing diffusion welded joints. The influence of bonding temperatures on nanomechanical properties of the weld interface was characterized through Nanoindentation tests under various loads (i.e. 20 mN to 100 mN). Additionally, electrochemical properties of the weld interface were also examined using a 0.5 M HCl solution. Results clinched that with the increase of bonding temperature significant suppression in carbide formation occurred along with the weld interface. This instigated a reduction in nano hardness and elastic moduli which resulted in maximum elastic recovery along with the weld interface. The indentation size effect was also evident below 40 mN load after which nano hardness became stable while elastic moduli remained impervious to the change of indentation load. Furthermore, based upon electrochemical properties (i.e. Icorr, Ep, and Rp) samples welded at 1000 °C bonding temperature offered excellent corrosion resistance under 0.5M HCl environment.

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“…Co, Cr, and Ni). Therefore, no evidence for the development of intermetallic compounds was seen which is also consistent with the literature (Wang et al, 2019;Zhu et al, 2021).…”

Section: Preparation Of Cocrni (Mea)supporting

confidence: 90%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Evaluation of nano mechanical properties and corrosion behavior of diffusion welded CoCrNi medium-entropy alloy (MEA) and SUS 304 stainless steel joints

Samiuddin,

Li,

Farooq

et al. 2023

Rev. metal.

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“…(1) Additive manufacturing (AM): The alloys discussed above were as cast. In recent years, AM technology has been gradually used to prepare HEAs [38,[79][80][81] . AM technology is more efficient and versatile and can directly prepare parts with complex structures.…”

Section: Preparation Methodsmentioning

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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“…Besides, the addition of nitrogen was able to markedly improve the anti-corrosion performance due to the high content of chromium oxide within the passivation layer. Wang et al [21] examined the microstructure, mechanical properties, and corrosion behaviour of the as-atomized CoCrNi MEA in 1 M NaOH solution, and found that the MEA consisting of an FCC structure had better corrosion endurance than 304 stainless steel. Nowadays, the corrosion behaviour of CoCrNi MEA has been mainly studied in aqueous solutions of NaCl, H 2 SO 4 , and NaOH.…”

Section: Introductionmentioning

confidence: 99%

Effect of pH on corrosion behaviour of CoCrNi MEA imposed by alternating current in Na₂CO₃/NaHCO₃ solution

Zhang,

Zhu,

Yuan

et al. 2023

Corrosion Engineering, Science and Technology: The Internationa

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The corrosion behaviour and mechanism of CoCrNi medium-entropy alloy (MEA) imposed by alternating current (AC) in HCO 3 − /CO 3 2− solution with various pH were systematically investigated via a series of corrosion tests. The results showed that with the augment of pH value, the polarisation resistance of the MEA decreased significantly, Ep shifted negatively, and ipI value increased, as well as corrosion rate was enhanced, revealing that the corrosion resistance was weakened. As solution pH increased, the formation of secondary passivation zone became easier, which may be attributed to the reaction conversion process of Cr(III) to Cr(VI) species. Moreover, the increase in pH led to an increase in defect density and a thinning of passivation film, facilitating the corrosion of the MEA. AC interference accelerated the ion exchange process and promoted the formation possibility of stable pitting. Higher iAC and pH inhibited the repassivation of metastable pitting, and increased the pitting susceptibility.

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Microstructure and properties of CoCrNi medium-entropy alloy produced by gas atomization and spark plasma sintering

Abstract: Abstract

Cited by 40 publications

References 37 publications

Evaluation of nano mechanical properties and corrosion behavior of diffusion welded CoCrNi medium-entropy alloy (MEA) and SUS 304 stainless steel joints

Evaluation of nano mechanical properties and corrosion behavior of diffusion welded CoCrNi medium-entropy alloy (MEA) and SUS 304 stainless steel joints

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

Effect of pH on corrosion behaviour of CoCrNi MEA imposed by alternating current in Na₂CO₃/NaHCO₃ solution

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Microstructure and properties of CoCrNi medium-entropy alloy produced by gas atomization and spark plasma sintering

Abstract: Abstract

Cited by 40 publications

References 37 publications

Evaluation of nano mechanical properties and corrosion behavior of diffusion welded CoCrNi medium-entropy alloy (MEA) and SUS 304 stainless steel joints

Evaluation of nano mechanical properties and corrosion behavior of diffusion welded CoCrNi medium-entropy alloy (MEA) and SUS 304 stainless steel joints

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

Effect of pH on corrosion behaviour of CoCrNi MEA imposed by alternating current in Na2CO3/NaHCO3 solution

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Effect of pH on corrosion behaviour of CoCrNi MEA imposed by alternating current in Na₂CO₃/NaHCO₃ solution