Review of micro-scale and atomic-scale corrosion mechanisms of second phases in aluminum alloys

Ji, Yuanyuan; Xu, Yunze; Zhang, Binbin; Behnamian, Yashar; Xia, Da-Hai; Hu, Wenbin

doi:10.1016/s1003-6326(21)65727-8

Cited by 65 publications

(23 citation statements)

References 92 publications

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“…Some studies have reported that these second phases in 5 xxx and 6 xxx alloys are mainly (Mg 2 Si) and (AlFeSi), which would act as cathodes to accelerate hydrogen generation because of their higher Volta potential difference (VPD). 61 This explains the high hydrogen evolution rates of the alloy anodes. However, it does not explain the higher electrochemical activity of the A6061 anode.…”

Section: Resultsmentioning

confidence: 94%

Investigation of commercial aluminum alloys as anode materials for alkaline aluminum–air batteries

Wang

Zhu

et al. 2023

Sustainable Energy Fuels

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Section: Resultsmentioning

confidence: 94%

Investigation of commercial aluminum alloys as anode materials for alkaline aluminum–air batteries

Wang

Zhu

et al. 2023

Sustainable Energy Fuels

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“…Figure 2 shows the OM images of the 7005 aluminum alloy plates aged at 120 °C for different durations: 2–15 μm of dark gray clumps of massive excess constituent particles were visible with fragmented chain distributions along the rolling direction in all the alloy plates. According to the results of Shan [ 14 ] and Ji [ 15 ], the 2–15 μm of dark gray clumps of excess constituent particles are presumed to be insoluble in α-Al(FeMn)Si (indicated by the arrow in Figure 2 b). No evident differences were found in configuration of the micron-sized insoluble excess constituent particles of α-Al(FeMn)Si between the alloy plates aged at 120 °C for different durations, indicating that aging at 120 °C for less than 192 h had no significant effect on the configuration of the excess constituent particles in the 7005 aluminum alloy plates.…”

Section: Resultsmentioning

confidence: 99%

Effect of Precipitates on the Mechanical Performance of 7005 Aluminum Alloy Plates

Tian

Zhang

et al. 2022

Materials

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In this study, the strength, elongation, and fatigue properties of 7005 aluminum alloy plates with different configurations of precipitates were investigated by means of tensile tests, fatigue tests, and microstructural observation. We found that the number and size of GP zones in an alloy plate matrix increased and the distribution was more uniform after the aging time was extended from 1 h to 4 h at 120 °C, which led to a rise in both strength and elongation of alloy plates with the extending aging time. The fatigue life of the alloy plates shortened slightly at first, then significantly prolonged, and then shortened again with the aging time extending from 1 h to 192 h and a fatigue stress level of 185 MPa and stress ratio (R) = 0. After aging at 120 °C for 96 h, the precipitates in the alloy plate matrix were almost all metastable η′-phase particles, which had the optimal aging strengthening effect on the alloy matrix, and the degree of mismatch between the α-Al matrix and second-phase particles was the smallest; the fatigue crack initiation and propagation resistances were the largest, leading to the best fatigue performance of alloy plates, and the fatigue life of the aluminum plate was the longest, up to 1.272 ´ 106 cycles. When the aging time at 120 °C was extended to 192 h, there were a small number of equilibrium η phases in the aluminum plates that were completely incoherent with the matrix and destroyed the continuity of the aluminum matrix, easily causing stress concentration. As a result, the fatigue life of alloy plates was shortened to 9.422 ´ 105 cycles.

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“…The corrosion of real aluminum alloy often occurs in polycrystalline system, and a single phase‐field variable cannot describe the polycrystalline system with a large number of grains. [ 34,35 ] Multi‐phase field model allows for distinguishing multiple grains conveniently by introducing multiple order parameters. The number of grains is used to distinguish different grains.…”

Section: Resultsmentioning

confidence: 99%

A New Multi‐Phase Field Model for the Electrochemical Corrosion of Aluminum Alloys

Chen

Tang

et al. 2022

Advcd Theory and Sims

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A profound understanding on the corrosion kinetics and mechanisms is crucial to help improve the corrosion resistance of alloys. Corrosion of aluminum alloys is very complex due to the interplay among a bunch of electrochemical reactions, and the influences of diversified precipitates. In this work, a new multi-phase field method is constructed to quantitatively analyze the corrosion kinetics of aluminum alloys, and a semi-implicit algorithm is developed to solve the numerical divergence resulted by the terms of reactions in concentration equations. Then, this new method is successfully used to simulate the pitting processes in the cases of a uniform matrix, a polycrystalline matrix, and a non-uniform matrix with secondary phase for aluminum alloys. More generally, the framework of this multi-phase field model can potentially be used to study the corrosion of other alloy systems, and microstructure evolution of a broad range of electrochemistry processes.

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Review of micro-scale and atomic-scale corrosion mechanisms of second phases in aluminum alloys

Cited by 65 publications

References 92 publications

Investigation of commercial aluminum alloys as anode materials for alkaline aluminum–air batteries

Investigation of commercial aluminum alloys as anode materials for alkaline aluminum–air batteries

Effect of Precipitates on the Mechanical Performance of 7005 Aluminum Alloy Plates

A New Multi‐Phase Field Model for the Electrochemical Corrosion of Aluminum Alloys

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