The effects of copper addition on phase composition in (CrFeCo)1-yNy multicomponent thin films

Rao, Smita G.; Shu, Rui; Boyd, Robert; Febvrier, Arnaud Le; Eklund, Per

doi:10.1016/j.apsusc.2021.151315

Cited by 8 publications

(8 citation statements)

References 27 publications

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“…With increasing Cu fraction, lattice distortions occurred, resulting in the transformation of BCC to BCC/B2 [31,32]. Similar observations have been documented for AlCoCuCrFeNiSi x and Al 0.5-CoCuCrFeNiSi x HEAs, where BCC/B2 phase separation was observed, respectively [27,37,38].…”

Section: Microstructuresupporting

confidence: 78%

“…Minsu et al [26] have demonstrated a similar behavior in AlFeMnTiSi 0.75 with the formation of Fe x Mn y and Laves. In addition, Rao et al [37] reported that the phase stability of (CrFeCoCu x ) 1- y N y alloy was favored upon the addition of Cu into the BCC matrix. Table 2 presents the phase distribution, phases fraction, lattice constant and crystallite size of AlFeMnTiSi 0.75 Cu x HEAs.…”

Section: Resultsmentioning

confidence: 99%

“…The addition of Cu to the HEA resulted in a preference for the BCC lattice, which was attributed to the low VEC and increasing Δχ of HEAs [26,28,37]. With increasing Cu fraction, lattice distortions occurred, resulting in the transformation of BCC to BCC/B2 [31,32].…”

Section: Microstructurementioning

confidence: 99%

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Correlation between the nanomechanical characteristic and the phase transformation of BCC-based high entropy alloys produced via powder metallurgy

et al. 2023

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In this study, the effects of Cu addition on AlFeMnTiSi 0.75 Cu x (x = 0, 0.25, 0.5, 0.75, 1.00; in molar ratios) high entropy alloys (HEAs) prepared via mechanical alloying and spark plasma sintering were investigated. The structure, phase, morphology and composition of HEA powders were analysed and the results revealed that the AlFeMnTiSi 0.75 Cu x HEAs exhibited a multiphase structure. Additionally, after sintering at 900 °C, the formation of BCC, µ and L2 1 phases in the densified HEAs was enhanced. The investigation of the hardness, nanoindentation and compressive properties revealed that the microstructural and mechanical properties of AlFeMnTiSi 0.75 Cu x HEAs were improved at the optimal Cu fraction (0.25 molar ratio). The nanoindentation results revealed that the AlFeMnTiSi 0.75 Cu x HEAs exhibited the highest hardness and elastic modulus (H IT = 19.2 GPa, E IT = 336 GPa). These results improve the current understanding of multiphase HEAs and may pave way for the development of advanced HEAs with superior mechanical properties.

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Section: Microstructuresupporting

confidence: 78%

Section: Resultsmentioning

confidence: 99%

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Correlation between the nanomechanical characteristic and the phase transformation of BCC-based high entropy alloys produced via powder metallurgy

et al. 2023

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“…Similar phenomena should definitely be present also in HEAs. Especially promising from this point of view are HEA thin films [72][73][74][75]. The HEA thin films are usually nanogranied and have, therefore, a high specific density of GBs.…”

Section: Gb Wetting By Second Solid Phase In Primarily Homogeneous He...mentioning

confidence: 99%

Grain Boundary Wetting by a Second Solid Phase in the High Entropy Alloys: A Review

et al. 2021

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In this review, the phenomenon of grain boundary (GB) wetting by the second solid phase is analyzed for the high entropy alloys (HEAs). Similar to the GB wetting by the liquid phase, the GB wetting by the second solid phase can be incomplete (partial) or complete. In the former case, the second solid phase forms in the GB of a matrix, the chain of (usually lenticular) precipitates with a certain non-zero contact angle. In the latter case, it forms in the GB continuous layers between matrix grains which completely separate the matrix crystallites. The GB wetting by the second solid phase can be observed in HEAs produced by all solidification-based technologies. The particle chains or continuous layers of a second solid phase form in GBs also without the mediation of a liquid phase, for example by solid-phase sintering or coatings deposition. To describe the GB wetting by the second solid phase, the new GB tie-lines should be considered in the two- or multiphase areas in the multicomponent phase diagrams for HEAs. The GB wetting by the second solid phase can be used to improve the properties of HEAs by applying the so-called grain boundary engineering methods.

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“…Laser cladding is the most frequently used technology for the manufacturing of HEA coatings [14][15][16]. HEA coatings can also be deposited by plasma cladding [17,18], plasma spray [19][20][21][22][23][24][25][26], thermal spray [27], magnetron sputtering [28][29][30][31][32][33][34][35][36][37], electric arc deposition [38], electron beam physical vapor deposition [39], and vacuum arc deposition [40][41][42][43][44]. The solidification of melted pool during laser cladding and the resulting microstructure can be strongly affected by complete or incomplete GB wetting.…”

Section: Introductionmentioning

confidence: 99%

High Entropy Alloys Coatings Deposited by Laser Cladding: A Review of Grain Boundary Wetting Phenomena

et al. 2022

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High-entropy alloys (HEAs) are called also alloys without a main component or multiprincipal alloys. They consist of five, six or more components in more or less equal proportions and possess unique properties. Several dozens of thousands of publications have already been devoted to bulk HEAs, while HEA coatings are just beginning to develop. More than half of the works on the deposition of HEA coatings are devoted to laser cladding. In the laser cladding process, a mixture of powders on a substrate is melted in a focused laser beam, which sequentially scans the substrate. In the heated zone, the powder mixture melts. At the end of the crystallization process, a solidified polycrystal and a small amount of residual melt are found in the heated zone. It is possible that the grain boundaries (GBs) in the solidified polycrystal are incompletely or fully wetted by this liquid phase. In this way, the GB wetting with a melt determines the morphology and microstructure of HEAs coatings. This review analyzes GB wetting in single-phase HEAs, as well as in HEAs containing two or more phases. We analyze how the HEAs’ composition, laser scanning speed, laser beam power, external magnetic field or ultrasonic impact affect the microstructure and GB wetting. It is also shown how the microstructure and GB wetting change over the thickness of the rather thick as well as multilayer coatings deposited using a laser cladding.

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The effects of copper addition on phase composition in (CrFeCo)1-yNy multicomponent thin films

Cited by 8 publications

References 27 publications

Correlation between the nanomechanical characteristic and the phase transformation of BCC-based high entropy alloys produced via powder metallurgy

Correlation between the nanomechanical characteristic and the phase transformation of BCC-based high entropy alloys produced via powder metallurgy

Grain Boundary Wetting by a Second Solid Phase in the High Entropy Alloys: A Review

High Entropy Alloys Coatings Deposited by Laser Cladding: A Review of Grain Boundary Wetting Phenomena

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