Composition and microstructure dependent corrosion behaviour of Mg-Li alloys

Li, C.Q.; Xu, Dekang; Chen, Xiaobo; Wang, B.J.; Wu, Ruizhi; Han, En‐Hou; Birbilis, Nick

doi:10.1016/j.electacta.2017.11.091

Cited by 187 publications

(61 citation statements)

References 45 publications

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“…7b and c, which is in line with reported results. [38][39][40] The further development of pitting forms a meshlike structure. However, there is also a signicant difference in morphology between them.…”

Section: Surface Morphology and Elementsmentioning

confidence: 99%

Electrochemical and adsorption behaviors of thiadiazole derivatives on the aluminum surface

et al. 2019

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Section: Surface Morphology and Elementsmentioning

confidence: 99%

Electrochemical and adsorption behaviors of thiadiazole derivatives on the aluminum surface

et al. 2019

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“…In general, intermetallic phases, such as Al 2 Ca particles, are chemically more stable than the α-Mg + β-Li matrix. Notably, previous studies have indicated that the corrosion resistance of the α-Mg phase is superior to that of the β-Li phase [29,30]. Thus, in stage 1, as shown in Figure 12, micro-galvanic couples first formed between the Al 2 Ca particles and the β-Li phases in the matrix.…”

Section: Corrosion Mechanism Of the Extruded Mg-7li-3al-xca Alloysmentioning

confidence: 82%

Effect of Ca Content on the Mechanical Properties and Corrosion Behaviors of Extruded Mg–7Li–3Al Alloys

Xiong

Yang

Deng

et al. 2019

Metals

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The effect of Ca addition on the microstructure, mechanical properties, and corrosion behaviors of the extruded Mg–7Li–3Al alloys was investigated. The results showed that the extruded Mg–7Li–3Al–xCa alloys consisted of α-Mg (hcp) + β-Li (bcc) matrix phases and Al2Ca. With increasing Ca content, the amount and morphology of the Al2Ca phase changed significantly. The grains of the extruded Mg–7Li–3Al–xCa alloys were refined by dynamic recrystallization during the extrusion process. The tensile tests results indicated that the extruded Mg–7Li–3Al–0.4Ca alloy exhibited favorable comprehensive mechanical properties; its ultimate tensile strength was 286 MPa, the yield strength was 249 MPa, and the elongation was 18.7%. The corrosion results showed that this alloy with 0.4 wt.% Ca addition exhibited superior corrosion resistance, with a corrosion potential Ecorr of −1.48742 VVSE, attributed to the formation of protective Al2Ca phases.

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“…Li is a more active metallic element than Mg, it is supposed to weaken the corrosion resistance of Mg matrix via adding Li element [23][24][25][26]. However, recent studies reported that the Li-enriched β phase will benefit the formation of a protective surface film and improve the corrosion resistance of the alloy [27,28]. Thus, one can infer that the microstructure characteristic of the duplex phases can greatly influence the corrosion behavior and corrosion resistance of Mg-Li alloys.…”

Section: Introductionmentioning

confidence: 99%

Developing Improved Mechanical Property and Corrosion Resistance of Mg-9Li Alloy via Solid-Solution Treatment

Wang

Song

Cheng

et al. 2019

Metals

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Cast Mg-9Li alloy was successfully solid-solution (SS) treated via heating at 575 °C for 4.5 h and rapidly quenched with ice-water mixture. The mechanical property and corrosion resistance of the SS alloy were simultaneously improved. Rapid bcc/hcp phase transition of the alloy occurred during the quenching process, creating the newly precipitated needle-like fine α-Mg phase, uniformly distributed in the β-Li phase matrix. Dramatic grain refinement and uniform distribution of the α-Mg phase, as well as the massively increased α/β phase interfaces, are factors leading to the improved mechanical property of the SS alloy. Meanwhile, due to the modified duplex-phase structure, the SS alloy has a uniform corrosion-resistant surface film on the β-Li phase, which completely covers the entire alloy surface and efficiently protects the substrate. In addition, the SS alloy has fewer difference in the elements concentration and corrosion activity of the duplex phases, which reduces the pitting sensitivity and improves the corrosion resistance of the alloy matrix. The findings in this binary Mg-Li alloy can also serve as a benchmark for other more practical and complicated Mg-Li alloys.

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Composition and microstructure dependent corrosion behaviour of Mg-Li alloys

Cited by 187 publications

References 45 publications

Electrochemical and adsorption behaviors of thiadiazole derivatives on the aluminum surface

Electrochemical and adsorption behaviors of thiadiazole derivatives on the aluminum surface

Effect of Ca Content on the Mechanical Properties and Corrosion Behaviors of Extruded Mg–7Li–3Al Alloys

Developing Improved Mechanical Property and Corrosion Resistance of Mg-9Li Alloy via Solid-Solution Treatment

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