AlxCoCrFeNiSi high entropy alloy coatings with high microhardness and improved wear resistance

Jin, Bingqian; Zhang, Nannan; Yu, Huishu; Hao, De-xi; Ma, Yan

doi:10.1016/j.surfcoat.2020.126328

Cited by 86 publications

(14 citation statements)

References 43 publications

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“…A comparison with other typical HEAs and conventional metallic materials, e.g., AISI 304 and Inconel 718, is also presented in Figure 5b. [ 40–43 ] Comparison with the

{Al}_{x} CoCrFeNi

HEAs, [ 41 ] shows that our

{Al}_{x} CrFeNi

MEAs exhibit a fairly low friction coefficient, as well as superior wear resistance. Further differences arise when comparing to Inconel 718.…”

Section: Resultsmentioning

confidence: 99%

Effect of Aluminum on the Friction and Wear Behavior of AlxCrFeNi Medium‐Entropy Alloys

2022

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Several high‐entropy alloys (HEAs) and medium‐entropy alloys (MEAs) are promising for wear applications due to their excellent strength and fracture toughness. Herein, a series of MEAs (x = 0.3, 0.5, 0.8, 1.0, 1.2) are prepared by a vacuum arc‐melting techniques. The effects of Al content on the crystal structures and mechanical properties are evaluated in terms of hardness and wear resistance. With an increase in Al content, the microstructure changes from face‐centered cubic (FCC) + body‐centered cubic (BCC)/B2 phases to B2/BCC phases. A higher volume fraction of the BCC phase with increasing Al content favors spinodal decomposition. The Vickers microhardness increases from 345HV (x = 0.3) to 486HV (x = 1.2) with increasing Al content; a nanohardness size effect is revealed by nanoindentation tests. For high Al contents (x = 1.2), the coefficient of friction and wear rate reach the lowest value when the worn surface is smooth with smaller debris, indicating improved wear resistance. Furthermore, this series of MEAs exhibits wear related to abrasion, adhesion, and oxidation; the dominant wear mechanism is influenced by the Al content.

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“…A comparison with other typical HEAs and conventional metallic materials, e.g., AISI 304 and Inconel 718, is also presented in Figure 5b. [ 40–43 ] Comparison with the

{Al}_{x} CoCrFeNi

HEAs, [ 41 ] shows that our

{Al}_{x} CrFeNi

MEAs exhibit a fairly low friction coefficient, as well as superior wear resistance. Further differences arise when comparing to Inconel 718.…”

Section: Resultsmentioning

confidence: 99%

Effect of Aluminum on the Friction and Wear Behavior of AlxCrFeNi Medium‐Entropy Alloys

2022

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“…Therefore, the use of plasma torches, plasma spray, and jets demands an indispensable consideration to generate highly efficient materials and overwhelming technology for developing nations. The plasma jet plants can implement a circular economy framework for the rising needs [68][69][70][71][72][73].…”

Section: Plasma Technologymentioning

confidence: 99%

Technologies to Manage Used Automotive Oil Filters in Iran: A Review Study

Hassanpour¹

2021

Arch Hyg Sci

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Background & Aims of the Study: Given that modern society is a rapidly moving civilization, the production of automobiles resulted in a massive quantity of Used Automotive Oil Filters (UAOFs). So handling the waste stream secures value-added to the national assets and underpins the demands in other sectors. The steel request is highly rising with the population growth, and dismantling and recycling UAOFs produces enough scrap steel to be retrieved in similar applications. Experts of this sector have forgotten this resource. The present review sought the UAOF recycling technologies from the initial step of the project to the recent developments in this area. Also, plasma technology application was addressed as the new technology posed and noticed its modern procedure in the UAOF recycling operation based on the existing technologies. Materials and Methods:In this review, the related articles were searched and studied using key relevant words. Also, we used valuable existing references in this regard. The industrial data employed in the present review refers to the project identification steps expressed and investigated by evaluator teams in the Environmental Impact Assessment (EIA) plan. Results:The collected results and concepts emphasized the redesign and reproduction of UAOF and employing frequently recycled scrap parts in the steel manufacturing operation. Conclusion:The plasma technology enhances the adhesion, wettability, electro-conductivity, and many other characteristics of adsorbents within AOF and generates value-added products and nano-metal oxides from scrap metals of UAOF.

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“…Numerous studies suggest that these metallic alloys have the potential to mitigate wear and corrosion compared to traditional alloys. [1][2][3] HEAs are characterized by their multicomponent compositions (five or more elements) DOI: 10.1002/adem.202101713 High entropy alloys (HEAs) represent a new class of advanced metallic alloys that exhibit unique structural features and promising properties. The potential benefit of HEAs, in conjunction with established thermal spray manufacturing technologies, can provide a practical approach to mitigate wear and corrosion.…”

Section: Introductionmentioning

confidence: 99%

“…Numerous studies suggest that these metallic alloys have the potential to mitigate wear and corrosion compared to traditional alloys. [ 1–3 ] HEAs are characterized by their multicomponent compositions (five or more elements) mixed in equimolar or close to equimolar concentrations, enabling them to form a single‐phase solid solution. [ 4 ] However, the formation of intermetallics together with solid solution phases was also reported for the HEAs.…”

Section: Introductionmentioning

confidence: 99%

Effect of Microstructure on Wear and Corrosion Performance of Thermally Sprayed AlCoCrFeMo High‐Entropy Alloy Coatings

2022

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mixed in equimolar or close to equimolar concentrations, enabling them to form a single-phase solid solution. [4] However, the formation of intermetallics together with solid solution phases was also reported for the HEAs. [5,6] The alloys exhibit an inherently high configurational entropy effect owing to compositionally complex mixing, which promotes the solid solution phases in the form of face-centered cubic (FCC) and/or body-centered cubic (BCC) phases. [6] Other core effects, such as sluggish diffusion, distorted lattice, and cocktail effect, favor HEAs to have outstanding properties, including excellent strength, [7] significant toughness, [8] and better strain hardening ability [9] with remarkable tribological characteristics, including superior wear and corrosion resistance. [6,[9][10][11] Various studies had been employed to produce HEAs by arc melting, [12,13] spark plasma sintering, [14] laser technology, [15] microwave processing, [5,16] additive manufacturing, [17,18] and thermal spraying. [19,20] Among the techniques, thermal spray manufacturing is a promising and well-established technology, which is capable of using a broad range of feedstocks (including alloys, ceramics, and polymers) for producing thick coatings for use in developing protective surface layers. [21] The impact of thermal spraying of HEA coatings on microstructure, mechanical, and wear properties has been studied previously. [22,23] For instance, Wang et al. [24] reported excellent hardness for the AlCoCrFeNi HEA coatings developed via atmospheric plasma spraying due to hard BCC and ordered B2 phases. Another study by Meghwal et al. [22] reported high hardness of around 4 GPa for AlCoCrFeNi due to the formation of Al-rich oxide phases. Still a noticeable decrease in the corrosion performance was found compared to 316L stainless steel under seawater conditions. However, the high-temperature heat source in thermal spraying can result in undesirable phase transformations, residual stresses, and oxide contaminations. [23] In addition, the oxide inclusions along with voids such as pores and cracks are detrimental for protective performance against electrochemical damage. To probe such microstructural inhomogeneities, deposition techniques that operate with low-temperature heat sources are desirable.Cold spraying is a branch of thermal spray technologies that received attention for structural repair coatings for various

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AlxCoCrFeNiSi high entropy alloy coatings with high microhardness and improved wear resistance

Cited by 86 publications

References 43 publications

Effect of Aluminum on the Friction and Wear Behavior of AlxCrFeNi Medium‐Entropy Alloys

Effect of Aluminum on the Friction and Wear Behavior of AlxCrFeNi Medium‐Entropy Alloys

Technologies to Manage Used Automotive Oil Filters in Iran: A Review Study

Effect of Microstructure on Wear and Corrosion Performance of Thermally Sprayed AlCoCrFeMo High‐Entropy Alloy Coatings

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