Research Progress on the Corrosion Behavior of Magnesium–Lithium-Based Alloys: A Review

Wang, Baojie; Luan, Jiyu; Xu, Daokui; Sun, Jie; Li, Chuan-Qiang; Han, En‐Hou

doi:10.1007/s40195-018-0847-9

Cited by 71 publications

(13 citation statements)

References 81 publications

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“…Hot tensile property is an important performance index of heat resistant steel. Generally, the dynamic recovery (DRV) and dynamic recrystallization (DRX) are the most softening mechanisms during the deformation [3,4]. The microstructural reconstitution including grain refinement and structure homogenization can be achieved, which will be beneficial to improve the high temperature strength and toughness of the materials [5].…”

Section: Of 17mentioning

confidence: 99%

Tensile Properties and Microstructural Evolution of an Al-Bearing Ferritic Stainless Steel at Elevated Temperatures

Han

Sun

et al. 2020

Metals

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The influence of temperature and strain rate on the hot tensile properties of 0Cr18AlSi ferritic stainless steel, a potential structural material in the ultra-supercritical generation industry, was investigated at temperatures ranging from 873 to 1123 K and strain rates of 1.7 × 10−4–1.7 × 10−2 s−1. The microstructural evolution linked to the hot deformation mechanism was characterized by electron backscatter diffraction (EBSD). At the same strain rate, the yield strength and ultimate tensile strength decrease rapidly from 873 K to 1023 K and then gradually to 1123 K. Meanwhile, both yield strength and ultimate tensile strength increase with the increase in strain rate. At high temperatures and low strain rates, the prolonged necking deformation can be observed, which determines the ductility of the steel to some extent. The maximum elongation is obtained at 1023 K for the strain rates of 1.7 × 10−3 and 1.7 × 10−2 s−1, while this temperature is postponed to 1073 K once decreasing the strain rate to 1.7 × 10−4 s−1. Dynamic recovery (DRV) and continuous dynamic recrystallization (CDRX) are found to be the main softening mechanisms during the hot tensile deformation. With the increase of temperature and the decrease of strain rate (i.e., 1123 K and 1.7 × 10−4 s−1), the sub-grain coalescence becomes the main mode of CDRX that evolved from the sub-grain rotation. The gradual decrease in strength above 1023 K is related to the limited increase of dynamic recrystallization and the sufficient DRV. The area around the new small recrystallized grains on the coarse grain boundaries provides the nucleation site for cavity, which generally results in a reduction in ductility. Constitutive analysis shows that the stress exponent and the deformation activation energy are 5.9 and 355 kJ·mol−1 respectively, indicating that the dominant deformation mechanism is the dislocations motion controlled by climb. This work makes a deeply understanding of the hot deformation behavior and its mechanism of the Al-bearing ferritic stainless steel and thus provides a basal design consideration for its extensive application.

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Section: Of 17mentioning

confidence: 99%

Tensile Properties and Microstructural Evolution of an Al-Bearing Ferritic Stainless Steel at Elevated Temperatures

Han

Sun

et al. 2020

Metals

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“…As a hot research topic, the Mg-8Li alloy with a dual-phase structure has excellent comprehensive properties. However, as a result of the intense chemical activity, with the increase of element Li in the alloy, the corrosion resistance will decline gradually [12]. Meanwhile, in the duplex phase Mg-Li alloy, due to the potential difference between the α-Mg phase and the β-Li phase in the Mg-Li alloy, galvanic corrosion occurs readily, which means that the duplex phase Mg-Li alloy possesses poorer corrosion resistance than single phase Mg-Li alloys [13].…”

Section: Introductionmentioning

confidence: 99%

Effect of I-Phase on Microstructure and Corrosion Resistance of Mg-8.5Li-6.5Zn-1.2Y Alloy

Fang

Wang

et al. 2023

Materials

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The effects of solid solution treatment duration on the corrosion behavior and microstructure behavior of the cast Mg-8.5Li-6.5Zn-1.2Y (wt.%) alloy were investigated. This study revealed that with the treatment time for solid solutions increasing from 2 h to 6 h, the amount of α-Mg phase gradually decreases, and the alloy presents a needle-like shape after solid solution treatment for 6 h. Meanwhile, when the solid solution treatment time increases, the I-phase content drops. Exceptionally, under 4 h of solid solution treatment, the I-phase content has increased, and it is dispersed uniformly over the matrix. What we found in our hydrogen evolution experiments is that the hydrogen evolution rate of the as-cast Mg-8.5Li-6.5Zn-1.2Y alloy following solid solution processing for 4 h is 14.31 mL·cm−2·h−1, which is the highest rate. In the electrochemical measurement, the corrosion current density (icorr) value of as-cast Mg-8.5Li-6.5Zn-1.2Y alloy following solid solution processing for 4 h is 1.98 × 10−5, which is the lowest density. These results indicate that solid solution treatment can significantly improve the corrosion resistance of the Mg-8.5Li-6.5Zn-1.2Y alloy. The I-phase and the α-Mg phase are the primary elements influencing the corrosion resistance of the Mg-8.5Li-6.5Zn-1.2Y alloy. The existence of the I-phase and the border dividing the α-Mg phase and β-Li phase easily form galvanic corrosion. Although the I-phase and the boundary between the α-Mg phase and β-Li phase will be corrosion breeding sites, they are more effective in inhibiting corrosion.

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“…Magnesium alloys are commonly used in transportation, aerospace, electronics and other industries because of their light weight, exceptional damping capacity, high specific strength and specific modulus characteristics (Kainer, 2003;Pilliar, 2021). Nevertheless, the nature of its chemical properties is relatively active, and it is easy to react with corrosive medium, resulting in corrosion problems (Wang et al, 2019a;Esmaily et al, 2017;Song and Atrens, 2007;Atrens et al, 2020). Therefore, more attention should be paid to the corrosion behavior of magnesium alloy.…”

Section: Introductionmentioning

confidence: 99%

In situ study on the effect of stress on corrosion behavior of AZ91 magnesium alloy

Zhao

et al. 2022

ACMM

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Purpose This paper aims to investigate the corrosion evolution process of AZ91 magnesium alloy in 3.5 wt.% NaCl solution under different stresses by using in situ methods, thereby evaluate the influence of stress on the corrosion sensitivity of AZ91 magnesium alloy, and discuss the potential mechanism. Design/methodology/approach A four-point bending method was used to apply different loads to the magnesium alloy samples, a charge coupled device camera and electrochemical impedance spectroscopy test being used for in situ study. Scanning electron microscopy and X-ray diffraction (XRD) analysis were performed for corrosion product and morphology characteristics. Findings The observation results show that the corrosion of AZ91 magnesium alloy becomes more and more serious with the increase in the stress and generated many corrosion products. Originally, corrosion products prevented alloy matrix from contacting the corrosive medium. However, the increase in the stress facilitated the emergence of the corrosion holes in the corrosion products, which provided the microscopic channels for corrosive solution to attack the Mg alloy matrix, and accelerated the corrosion of the magnesium alloy, resulting in a lot of corrosion pits on the magnesium alloy surface under the corrosion product layer. Originality/value The evolution information of corrosion process is crucial to explore the mechanism of corrosion. Currently, most researches about corrosion of magnesium alloy used traditional testing techniques to obtain corrosion information, lacking the direct tracking and monitoring of the corrosion evolution process. Hence, this paper focuses on in situ corrosion study of AZ91 magnesium alloy. The technology with spatial resolution capability observed the changes in magnesium alloy surface at different times in the corrosion process in situ. Meanwhile, the in situ electrochemical technology was used to monitor the changes in micro-electrochemical signals during the corrosion process of magnesium alloy under different stresses.

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Research Progress on the Corrosion Behavior of Magnesium–Lithium-Based Alloys: A Review

Cited by 71 publications

References 81 publications

Tensile Properties and Microstructural Evolution of an Al-Bearing Ferritic Stainless Steel at Elevated Temperatures

Tensile Properties and Microstructural Evolution of an Al-Bearing Ferritic Stainless Steel at Elevated Temperatures

Effect of I-Phase on Microstructure and Corrosion Resistance of Mg-8.5Li-6.5Zn-1.2Y Alloy

In situ study on the effect of stress on corrosion behavior of AZ91 magnesium alloy

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