Effect of crystallographic texture and twinning on the corrosion behavior of Mg alloys: A review

Gerashi, Ehsan; Alizadeh, Reza; Langdon, Terence G.

doi:10.1016/j.jma.2021.09.009

Cited by 133 publications

(18 citation statements)

References 78 publications

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“…It is reported that the deformation mechanism of the deformed Al 5 was twinning; however, deformed Al 10 has twinning and shear band mechanisms. The high density of twins eliminated in Al 5 results in relatively more polarization resistance, in good agreement with (Gerashi et al , 2022). Nonetheless, it is worth noting that the presence of shear bands in the alloys significantly impacted the CR.…”

Section: Resultssupporting

confidence: 83%

Optimizing corrosion resistance of Fe₃₅Ni₂₀Cr₁₂Mn₂₈Al₅ high-entropy alloy: synergistic effect of Mo inhibitor, Al content and cold rolling

Elkatatny,

Zaky,

Abdelaziem

et al. 2024

ACMM

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Purpose This study aims to investigate the corrosion behavior of cold-rolled Fe35Ni20Cr12Mn(28-x)Alx high-entropy alloys (HEAs) using the potentiodynamic polarization technique in 1 M H2SO4 acid. Additionally, the influence of molybdenum (Mo) additions as inhibitors and the effect of variations in cold rolling reduction ratios and Al content on corrosion behavior are examined. Design/methodology/approach Two cold rolling reduction ratios, namely, 50% (R50) and 90% (R90), were examined for the cold-rolled Fe35Ni20Cr12Mn28Al5 (Al5) and Fe35Ni20Cr12Mn23Al10 (Al10) HEAs. Mo inhibitor additions were introduced at varying concentrations of 0.3, 0.6 and 0.9 Wt.%. The potentiodynamic polarization technique was used to evaluate the corrosion rates (CRs) under different experimental conditions. Findings The results indicate that the addition of 0.3 Wt.% Mo in 1 M H2SO4 yielded the lowest CR for both R50 and R90, irrespective of the Al content in the HEAs. However, the highest CR was observed at 0.6 Wt.% Mo addition. Furthermore, increasing the concentration of Al resulted in a corresponding rise in the CR. Comparatively, the CR decreased significantly when the cold rolling reduction ratio increased from R50 to R90. Originality/value This research provides valuable insights into the intricate relationship between Mo inhibitors, cold rolling reduction ratio, Al content and the resulting corrosion behavior of Fe35Ni20Cr12Mn(28-x)Alx HEAs. The comprehensive analysis of corroded HEAs, including surface morphology, compositions and elemental distribution mapping, contributes to the understanding of the corrosion mechanisms and offers potential strategies for enhancing the corrosion behavior of HEAs.

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Section: Resultssupporting

confidence: 83%

Optimizing corrosion resistance of Fe₃₅Ni₂₀Cr₁₂Mn₂₈Al₅ high-entropy alloy: synergistic effect of Mo inhibitor, Al content and cold rolling

Elkatatny,

Zaky,

Abdelaziem

et al. 2024

ACMM

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“…For Mg–0.5Zr–0.5Ca–1Zn, Mg–0.5Zr–0.5Ca–2Zn, and Mg–0.5Zr–0.5Ca–7Zn alloys, the fluctuations of the anodic branch disappear, indicating the formation of a stable protective film on the surface, which can contribute to the enhancement of corrosion resistance. [ 52–54 ] However, the i Corr for Mg–0.5Zr–0.5Ca–2Zn and Mg–0.5Zr–0.5Ca–7Zn alloys is higher compared to the Mg–0.5Zr–0.5Ca–1Zn alloy due to the presence of a quasi‐continuous network of the eutectic structure with a more positive potential compared to the matrix. This induces strong microgalvanic corrosion.…”

Section: Resultsmentioning

confidence: 99%

Mechanical Properties and Corrosion Behavior of Biodegradable Mg–0.5Zr–0.5Ca–xZn Magnesium Alloys

et al. 2023

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Mechanical properties and in vitro corrosion behavior of biodegradable Mg–0.5Zr–0.5Ca–xZn alloys in the simulated body fluid (SBF) solution are investigated. Zinc addition leads to a remarkable grain refinement in the as‐cast condition, as well as the formation of Ca2Mg6Zn3 and Mg7Zn3 compounds. As a result, the lean Mg–0.5Zr–0.5Ca–1Zn alloy shows the best combination of mechanical properties with an ultimate tensile strength (UTS) of 182 MPa, total elongation of 9.5%, and tensile toughness of 13 MJ m−3, which reveals ≈80%, 72%, and 190% improvements compared to those obtained for the Mg–0.5Zr–0.5Ca alloy, respectively. This sample also exhibits improved corrosion behavior, where a decrease in the corrosion current density (iCorr) is recorded via the addition of 1 wt% Zn. However, higher Zn additions result in the formation of a quasi‐continuous eutectic network with the consequent deterioration of tensile properties and increased effect of microgalvanic couples. The extreme grain refinement induced by the dynamic recrystallization (DRX) remarkably improves the overall mechanical properties of the hot extruded alloy but increased the iCorr. Accordingly, the properties of Mg–0.5Zr–0.5Ca alloys can be tailored for biomedical applications via Zn addition and thermomechanical processing.

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“…An additional peak near misorientation of 90° is associated with boundaries Σ15b and Σ17a. These boundaries can be assigned to twin boundaries

[ 49 ]. Twins can have a dual effect of the corrosion rate [ 50 ].…”

Section: Discussionmentioning

confidence: 99%

Effects of Severe Plastic Deformation and Ultrasonic Treatment on the Structure, Strength, and Corrosion Resistance of Mg-Al-Zn Alloy

et al. 2022

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Nowadays, there is a great demand for increasing the strength and corrosion resistance of magnesium alloys for their wider use in machine engineering, oil industry, and medicine. This paper is devoted to a study on the effects of the combined process of reduction and equal channel angular pressing, as well as the subsequent ultrasonic irradiation on the structure, strength, and corrosion properties of the Mg-Al-Zn alloy. Deformation processing results in an increase of the strength up to 280 ± 10 MPa. A fine-grained structure is formed with a grain size of 10–20 µm and small recrystallized grains 1–2 µm in size. The corrosion resistance in the HCl medium falls down significantly. Action of ultrasound on the deformed specimen leads to an increased fraction of high-angle boundaries, in particular, the fractions of special, fully overlapping Σ13a boundaries and twin boundaries of Σ15b and Σ17a systems. Due to the ultrasonic treatment, the strength of the Mg-Al-Zn alloy increases up to 310 ± 5 MPa, while the corrosion resistance in HCl almost doubles.

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Effect of crystallographic texture and twinning on the corrosion behavior of Mg alloys: A review

Cited by 133 publications

References 78 publications

Optimizing corrosion resistance of Fe₃₅Ni₂₀Cr₁₂Mn₂₈Al₅ high-entropy alloy: synergistic effect of Mo inhibitor, Al content and cold rolling

Optimizing corrosion resistance of Fe₃₅Ni₂₀Cr₁₂Mn₂₈Al₅ high-entropy alloy: synergistic effect of Mo inhibitor, Al content and cold rolling

Mechanical Properties and Corrosion Behavior of Biodegradable Mg–0.5Zr–0.5Ca–xZn Magnesium Alloys

Effects of Severe Plastic Deformation and Ultrasonic Treatment on the Structure, Strength, and Corrosion Resistance of Mg-Al-Zn Alloy

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Effect of crystallographic texture and twinning on the corrosion behavior of Mg alloys: A review

Cited by 133 publications

References 78 publications

Optimizing corrosion resistance of Fe35Ni20Cr12Mn28Al5 high-entropy alloy: synergistic effect of Mo inhibitor, Al content and cold rolling

Optimizing corrosion resistance of Fe35Ni20Cr12Mn28Al5 high-entropy alloy: synergistic effect of Mo inhibitor, Al content and cold rolling

Mechanical Properties and Corrosion Behavior of Biodegradable Mg–0.5Zr–0.5Ca–xZn Magnesium Alloys

Effects of Severe Plastic Deformation and Ultrasonic Treatment on the Structure, Strength, and Corrosion Resistance of Mg-Al-Zn Alloy

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Optimizing corrosion resistance of Fe₃₅Ni₂₀Cr₁₂Mn₂₈Al₅ high-entropy alloy: synergistic effect of Mo inhibitor, Al content and cold rolling

Optimizing corrosion resistance of Fe₃₅Ni₂₀Cr₁₂Mn₂₈Al₅ high-entropy alloy: synergistic effect of Mo inhibitor, Al content and cold rolling