A New Iron-Rich Intermetallic-Al
                m
              Fe Phase in Al-4.6Cu-0.5Fe Cast Alloy

Liu, Kun; Cao, X.; Chen, X.-G.

doi:10.1007/s11661-011-1004-5

Cited by 42 publications

(25 citation statements)

References 19 publications

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“…According to Liu et al [4], Al m Fe (m between 4.0 and 4.4) is the most commonly observed intermetallics in AA1xxx and AA5xxx wrought aluminum alloys. On the other hand, for low cooling rates during solidification the precipitation of ironrich intermetallics such as Al 3 Fe and Al 6 Fe is expected in the case of Al-Fe-Si ingots [5][6][7].…”

Section: Introductionmentioning

confidence: 99%

The effects of microstructure and intermetallic phases of directionally solidified Al–Fe alloys on microhardness

2012

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Section: Introductionmentioning

confidence: 99%

The effects of microstructure and intermetallic phases of directionally solidified Al–Fe alloys on microhardness

2012

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“…The corrosion of Al alloys is often triggered by the formation of the local corrosion cells around intermetallic particles (IMPs) [27][28][29][30][31][32] or grain boundaries. [33][34][35][36][37][38] Among various IMPs, Al-Fe particles are commonly formed in any Al alloys due to the inclusion of Fe in the recycling process of Al-containing materials.…”

Section: Introductionmentioning

confidence: 99%

Size‐Dependent Corrosion of Al‐Fe Intermetallic Particles at Al‐Mg Alloy Surfaces Investigated by In‐Liquid Nanoscale Potential Measurement Technique

Hirata

Okamoto

Kitagawa

et al. 2023

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Corrosion of Al alloy often starts from the nanoscale corrosion around the surface‐exposed Al‐Fe intermetallic particles (IMPs) and leads to a serious damage limiting its application range in the automobile industry. To solve this issue, understanding of the nanoscale corrosion mechanism around the IMP is essential, yet it is impeded by the difficulties in directly visualizing nanoscale distribution of reaction activity. Here, this difficulty is overcomed by open‐loop electric potential microscopy (OL‐EPM) and investigate nanoscale corrosion behavior around the IMPs in H2SO4 solution. The OL‐EPM results reveal that the corrosion around a small IMP settles down in a short time (<30 min) after transient dissolution of the IMP surface while that around a large IMP lasts for a long time especially at its edges and results in a severe damage of the IMP and matrix. This result suggests that an Al alloy with many small IMPs gives a better corrosion resistance than that with few large IMPs if the total Fe content is the same. This difference is confirmed by corrosion weight loss test using Al alloys with different IMP sizes. This finding should give an important guideline to improve the corrosion resistance of Al alloy.

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“…In this study, we applied this strategy of introducing a slow diffusing, intermetallic forming element, namely Fe, in Aluminum, in order to reach by SPD a finely dispersed distribution of thermally stable particles and evaluate how this distribution can improve the thermal stability of SPD-formed UFG structures. Fe is known to have a very low miscibility in Al [32], to form brittle intermetallics [33] and to have one of the lowest diffusivities in Al [34,35]. Besides, due to its low solubility, it can potentially help to reach interesting combinations of strength and conductivity as proposed by several authors [6,27,28].…”

Section: Introductionmentioning

confidence: 99%

Structure and mechanical behavior of ultrafine-grained aluminum-iron alloy stabilized by nanoscaled intermetallic particles

et al. 2019

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Ultrafine-grained aluminum alloys offer interesting multifunctional properties with a combination of high strength, low electrical resistivity, and low density. However, due to thermally induced grain coarsening, they typically suffer from an intrinsic poor thermal stability. To overcome this drawback, an Al-2%Fe alloy has been selected because of the low solubility of Fe in Al and their highly positive enthalpy of mixing leading to the formation of stable intermetallic particles. The two-phase alloy has been processed by severe plastic deformation to achieve simultaneously submicrometer Al grains and a uniform distribution of nanoscaled intermetallic particles. The influence of the level of deformation on the microstructure has been investigated thanks to transmission electron microscopy and atom probe tomography and it is shown that for the highest strain a partial dissolution of the metastable Al6Fe particle occurred leading to the formation of a Fe super saturated solid solution. The thermal stability, and especially the precipitation of particles from the ultrafine-grained solid solution and the way they pin grain boundaries has been investigated both from static annealing and in-situ transmission electron microscopy experiments. The correlation between microstructural features and microhardness has been established to identify the various strengthening contributions. Finally, it is 2 shown that ultrafine grained high purity Al with less than 0.01 at. % Fe in solid solution could preserve a grain size only 300nm after 1h at 250°C.

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A New Iron-Rich Intermetallic-Al m Fe Phase in Al-4.6Cu-0.5Fe Cast Alloy

Cited by 42 publications

References 19 publications

The effects of microstructure and intermetallic phases of directionally solidified Al–Fe alloys on microhardness

The effects of microstructure and intermetallic phases of directionally solidified Al–Fe alloys on microhardness

Size‐Dependent Corrosion of Al‐Fe Intermetallic Particles at Al‐Mg Alloy Surfaces Investigated by In‐Liquid Nanoscale Potential Measurement Technique

Structure and mechanical behavior of ultrafine-grained aluminum-iron alloy stabilized by nanoscaled intermetallic particles

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