Structure and Mechanical Properties of Al-Cu-Fe-X Alloys with Excellent Thermal Stability

Školáková, Andrea; Novák, Pavel; Mejzlíková, Lucie; Průša, Filip; Salvetr, Pavel; Vojtěch, Dalibor

doi:10.3390/ma10111269

Cited by 26 publications

(9 citation statements)

References 31 publications

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“…Nonetheless, the coatings are seen to effectively protect the AA2024 alloy (Figure 4 Generally, materials with more negative E cor are known to experience more significant corrosion damage and vice versa. Corrosion current density i cor is also indicative characteristic of the degree of the material degradation at corrosion attack [33,35,36,39,[45][46][47][48][49]. In this study, the i cor values were assessed using a Tafel fitting by the intersection of the tangent to cathodic polarization curve and the E cor level [39,44].…”

Section: Resultsmentioning

confidence: 99%

“…It was shown that their hardness and wear resistance values are comparable to or even higher than that of the natural composites containing QC particles distributed in the bcc β-phase [25][26][27][28][29], multi-phase alloys, or artificial Al-based composite layers containing QC particles [30][31][32]. The corrosion resistance of the QC coatings was shown to be high and comparable with that of stainless steel [33][34][35].…”

Section: Introductionmentioning

confidence: 99%

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Protection of AA2024 alloy against wear and corrosion by HVAF sprayed AlCuFe coating

Wang

Iefimov

et al. 2023

Surface Engineering

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Quasicrystalline (QC) AlCuFe coating is produced on the AA2024 alloy using high-velocity airfuel (HVAF) spraying. The HVAF sprayed coatings are studied in as-deposited and subsequently annealed (400°C, 1 h) states. XRD, SEM, and EDX analysis revealed a two-phase microstructure comprising QC icosahedral ψ-phase (the volume fraction of ∼75%) and interlayered bcc βphase that remains the same as that in a water-atomized AlCuFe powder used as feeding material. The used annealing exerts a negligible effect on the protective properties of the HVAF coating that possesses good adhesion strength (>12 MPa), a high HV microhardness (7.1 ± 0.2 GPa), nanohardness (11.1 ± 0.2 GPa), elastic modulus (169 GPa), the essentially lowered wear losses (0.71 μm), coefficient of friction (CoF≈0.03), and corrosion current density (6.7 μm cm −2 ) in a 3.5%NaCl medium. These characteristics are much better than those of the original AA2024 alloy.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Protection of AA2024 alloy against wear and corrosion by HVAF sprayed AlCuFe coating

Wang

Iefimov

et al. 2023

Surface Engineering

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“…Therefore, hypoeutectic Al-Cu alloys with a relatively low percent of Cu should be considered. The addition of Ni increases the alloy strength, on the other side, the melting point starts to increase noticeably after passing the eutectic point 2.7 wt.% [18]. Moreover, the excess addition of Ni has no effect or negative effect on the strength of the alloy.…”

Section: Introductionmentioning

confidence: 93%

Ultrasonic-Assisted Brazing of Titanium Joints Using Modified Al-Si-Cu Based Fillers: Brazing at Liquid—Semisolid States under Load

Muhrat

Barbosa

2021

Metals

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Brazing joints of Ti/Ti under ultrasonic vibration (USV) and compression load were investigated using optimized and modified filler alloys of Al-Si-Cu-(Ni)-(Sr) group prepared in the lab. Preliminary trails at semisolid to liquid states were conducted using the ready Al-Si-Cu-(Mg) alloy as a filler, then the brazing cycle was redesigned and enhanced according to the microstructural observations of the produced joints. USV assisted brazing at semisolid state of low solid fraction was able to produce joints with round silicon morphology and granular , while at high solid fraction, USV was only able to affect the silicon and intermetallic particles. Applying a compression load after ultrasonic vibration, at a designed solid fraction, was proved to be a successful technique for improving the quality of the joints by reducing the porosity, enhancing the soundness of the joint, and the diffusion at the interface. Based on alloy composition and the improved brazing cycle, joints of thin intermetallic layer and high shear strength (of 93 MPa average value) were achieved. The microstructures and the mechanical behavior were discussed based on the filler compositions and brazing parameters.

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“…Therefore, understanding the interdiffusion mechanism and controlling the degree of IC formation at the Al/Cu interface are critical for good thermal conductivity. Školáková et al reported that the mechanical strength and hardness are influenced by the presence of the CuAl 2 phase [ 17 ]. The phases are very stable and when this phase is contained in the aluminum alloys could be precipitated during heat treatment and improve thermal properties [ 18 , 19 ].…”

Section: Introductionmentioning

confidence: 99%

Interdiffusion and Intermetallic Compounds at Al/Cu Interfaces in Al-50vol.%Cu Composite Prepared by Solid-State Sintering

Kim

Kwon

2021

Materials

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Al–Cu composites have attracted significant interest recently owing to their lightweight nature and remarkable thermal properties. Understanding the interdiffusion mechanism at the numerous Al/Cu interfaces is crucial to obtain Al–Cu composites with high thermal conductivities. The present study systematically investigates the interdiffusion mechanism at Al/Cu interfaces in relation to the process temperature. Al-50vol.%Cu composite powder, where Cu particles were encapsulated in a matrix of irregular Al particles, was prepared and then sintered at various temperatures from 340 to 500 °C. Intermetallic compounds (ICs) such as CuAl2 and Cu9Al4 were formed at the Al/Cu interfaces during sintering. Microstructural analysis showed that the thickness of the interdiffusion layer, which comprised the CuAl2 and Cu9Al4 ICs, drastically increased above 400 °C. The Vickers hardness of the Al-50vol.%Cu composite sintered at 380 °C was 79 HV, which was 1.5 times that of the value estimated by the rule of mixtures. A high thermal conductivity of 150 W∙m−1∙K−1 was simultaneously obtained. This result suggests that the Al-50vol.%Cu composite material with large number of Al/Cu interfaces, as well as good mechanical strength and heat conductance, can be prepared by solid-state sintering at a low temperature.

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Structure and Mechanical Properties of Al-Cu-Fe-X Alloys with Excellent Thermal Stability

Cited by 26 publications

References 31 publications

Protection of AA2024 alloy against wear and corrosion by HVAF sprayed AlCuFe coating

Protection of AA2024 alloy against wear and corrosion by HVAF sprayed AlCuFe coating

Ultrasonic-Assisted Brazing of Titanium Joints Using Modified Al-Si-Cu Based Fillers: Brazing at Liquid—Semisolid States under Load

Interdiffusion and Intermetallic Compounds at Al/Cu Interfaces in Al-50vol.%Cu Composite Prepared by Solid-State Sintering

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