FeMnNiCoCr-based high entropy alloy coatings: Effect of nitrogen additions on microstructural development, mechanical properties and tribological performance

Sha, Chuhan; Zhou, Zhifeng; Xie, Zonghan; Munroe, Paul

doi:10.1016/j.apsusc.2019.145101

Cited by 74 publications

(18 citation statements)

References 85 publications

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“…The second class is 3d-TM multicomponent nitrides, their constituent elements, i.e., late TMs, have much poor nitride-formation ability compared to refractory metals (also seen in Figure 1.1). Even there are a few studies on 3d-TM multicomponent nitride films, for example, (FeCo-NiCrCuAlMn)Nx [41] , (CoCrCuFeNi)Nx [38] and (FeMnNiCoCr)Nx [42] , this direction still requires wider both theoretical and experimental studies. In addition, the abilities of forming nitrides vary with transition metals (Table 1.1 and Fig-ure1.1a), for example, refractory metals in first class have stronger abilities to bond with nitrogen, in particular, when nitrogen is not sufficient.…”

Section: Multicomponent Nitridementioning

confidence: 99%

Nonstoichiometric Multicomponent Nitride Thin Films

Shu

2020

Linköping Studies in Science and Technology. Licentiate Thesis

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High entropy ceramics have rapidly developed as a class of materials based on high entropy alloys; the latter being materials that contain five or more elements in near-equal proportions. Their unconventional compositions and chemical structures hold promise for achieving unprecedented combinations of mechanical, electrical and chemical properties. In this thesis, high entropy ceramic films, (TiNbZrTa)Nx were deposited using reactive magnetron sputtering with segmented targets. The stoichiometry x was tuned with two deposition parameters, i.e., substrate temperature and nitrogen flow ratio fN, their effect on microstructure and mechanical, electric, and electrochemical properties were investigated.

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Section: Multicomponent Nitridementioning

confidence: 99%

Nonstoichiometric Multicomponent Nitride Thin Films

Shu

2020

Linköping Studies in Science and Technology. Licentiate Thesis

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“…Khan et al [ 26 ] demonstrated EDS mapping of films grown at different operating pressures and observed uniformity of film deposition. Sha [ 27 ] and Malinovskis et al [ 28 ] obtained uniform film by rotating the substrate at a constant speed. In this work, using the four-target co-sputtering technique, it is still possible to obtain the alloy films with the locally uniformly distributed elements.…”

Section: Resultsmentioning

confidence: 99%

High-Throughput Preparation and Characterization of ZrMoTaW Refractory Multi-Principal Element Alloy Film

et al. 2022

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In this work, high-throughput screening technology is applied to four-member refractory multi-principal element alloys (RMPEAs) films with high W content. The exploration of refractory metals such as W is strictly limited by the high melting temperature in this work; a multi-gradient deposition method was introduced to overcome this obstacle. By adjusting the power and distance from the target to the sample, component Zr11Mo11Ta25W53 with the best hardening performance was successfully obtained. The uniformity of the material library was analyzed from the perspectives of phase structure and micromorphology. With the help of Hume-Rothery theory and XRD analysis, it is shown that the film has a stable bcc structure. It is believed that film uniformity, nanoscale size, preferential orientation, surface roughness, and solution mechanism are the pivotal factors to improve hardness performance, especially for high W components. The hardness and modulus of elasticity can reach 20 GPa and 300 GPa, respectively, and the H/Er and H3/Er2 values are 0.067 and 0.065, showing the best wear resistance in many samples.

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“…Finally, nitrogen is also widely used in industry to increase the mechanical properties of surfaces through nitriding. Promising properties of high entropy nitride films were recently reported in the literature [17], [18], [19].…”

Section: -Introductionmentioning

confidence: 92%

Nitrogen-induced hardening in an austenitic CrFeMnNi high-entropy alloy (HEA)

Traversier

Mestre-Rinn

Peillon

et al. 2021

Materials Science and Engineering: A

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Nitrogen is a well-known gamma-stabiliser in austenitic steels, also responsible for significant solid solution hardening of these materials. Yet, only few papers have studied its impact on austenitic high-entropy alloy (HEA) matrixes. This study focuses on a cobalt-free, non equimolar CrFeMnNi HEA doped with nitrogen. A series of alloys was cast under a nitriding atmosphere to promote nitrogen absorption into the liquid alloy. Study of as-cast alloys has shown nitrogen presence in solid solution up to 0.3 wt. % (1.2 at. %). Over the whole range of compositions, a linear increase of hardness (134 HV/wt. % of N) was measured as well as an expansion of the lattice parameter of a/a= 1.01 / wt. % N due to nitrogen addition in the interstitial sites of the lattice. Tests on forged and annealed samples showed that the increase of hardness with nitrogen addition is higher than in as-cast state (210 HV / wt. % of N) surely due to presence of other strengthening mechanisms. Tensile tests confirmed that the presence of dissolved nitrogen increases yield strength and ultimate strength and enhances strain-hardening, without any modification of ductility.

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FeMnNiCoCr-based high entropy alloy coatings: Effect of nitrogen additions on microstructural development, mechanical properties and tribological performance

Cited by 74 publications

References 85 publications

Nonstoichiometric Multicomponent Nitride Thin Films

Nonstoichiometric Multicomponent Nitride Thin Films

High-Throughput Preparation and Characterization of ZrMoTaW Refractory Multi-Principal Element Alloy Film

Nitrogen-induced hardening in an austenitic CrFeMnNi high-entropy alloy (HEA)

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