Towards magnesium alloys for high-volume automotive applications

Joost, William J.; Krajewski, Paul E.

doi:10.1016/j.scriptamat.2016.07.035

Cited by 602 publications

(179 citation statements)

References 62 publications

Supporting

Mentioning

176

Contrasting

Unclassified

Order By: Relevance

“…[1][2][3] They have been widely used in the automotive industry, as aerospace components, and in the field of electronics. [4][5][6][7][8][9] However, Mg alloys have high chemical activities, and are susceptible to corrosion, especially galvanic corrosion arising from interactions with more noble materials such as steel. 10 Their active corrosion behavior is a barrier to wider applications.…”

mentioning

confidence: 99%

Corrosion Inhibition Study of Aqueous Vanadate on Mg Alloy AZ31

Feng

Hurley

et al. 2018

J. Electrochem. Soc.

View full text Add to dashboard Cite

Corrosion inhibition of AZ31 Mg alloy with aqueous vanadate was studied and has been attributed to the pH dependence of vanadate speciation. Immersion in tetrahedral coordinated vanadate species, present in neutral and alkaline solution, was shown to decrease corrosion current density and increase the breakdown potential, both of which were enhanced with longer immersion times. Exposure to octahedral coordinated vanadate, predominant in acidic solution, only slightly decreased corrosion current density. An acidic solution was adjusted to alkaline conditions and samples were immersed in the adjusted alkaline solution. Inhibition of these samples was weaker than that of samples immersed in initially alkaline solutions. Anodic inhibition was observed on samples treated in solutions containing tetrahedral species. SEM images showed that vanadate formed a film across secondary particles and the Mg matrix, and provided qualitative evidence that inhibition efficiency increased as the pH increased. XPS results indicated that film formation was associated with the reductive adsorption of vanadium oxoions. Exposure at pH 5.0 produced a film predominated by V 4+ . Exposure at pH values of 7.7 and higher, however, produced a film containing predominantly V 3+ . Mg alloys have attracted great attention due to their high strength/weight ratio, good thermal conductivity and other physical properties.1-3 They have been widely used in the automotive industry, as aerospace components, and in the field of electronics.4-9 However, Mg alloys have high chemical activities, and are susceptible to corrosion, especially galvanic corrosion arising from interactions with more noble materials such as steel.10 Their active corrosion behavior is a barrier to wider applications. Therefore, protection under various application conditions is a critical issue strongly worthy of investigation. 11,12Extensive research has been conducted with the goal of inhibiting corrosion and improving the corrosion resistance of Mg alloys. Many corrosion mitigation methods have been reported, including alloying, surface modification, coatings, and inhibitors.13-15 Birbilis et al. studied the effect of numerous alloying elements on the corrosion kinetics of Mg, graphically presenting the effect of anodic and cathodic kinetics on over 30 alloying elements. 16,17 These detailed studies of alloying elements provided beneficial information for the fabrication, modification and development of corrosion-resistant Mg alloys. Surface modification of Mg alloys includes anodizing, 18 hot diffusion, 19 laser treatment 20 and other treatments that affect the surface, but do not change the original mechanical properties of the alloy.15 Surface modification can increase polarization resistance and reduce the localized galvanic interactions that arise from the heterogeneous structure found in these alloys. 15,[18][19][20] Conversion coatings are another effective method to improve the corrosion resistance of Mg alloys.21 These coatings can provide excellent protection of the s...

show abstract

mentioning

confidence: 99%

Corrosion Inhibition Study of Aqueous Vanadate on Mg Alloy AZ31

Feng

Hurley

et al. 2018

J. Electrochem. Soc.

View full text Add to dashboard Cite

show abstract

“…Magnesium alloys were widely used in automotive, aerospace, weapons and other industries because of their advantage of high specific strength, specific stiffness, noise reduction and vibration absorption [1]. With the increasing application demand of material, the failure mechanism of quas-static deformation was hardly satisfied the requirement of the magnesium alloy application under high strain rate condition.…”

Section: Introductionmentioning

confidence: 99%

Localized deform behavior of AZ31B magnesium alloy by numerical simulation

Zhang

Liu

Mao

et al. 2019

Materialwissenschaft Werkst

View full text Add to dashboard Cite

The dynamic compression behavior of AZ31B magnesium alloy with hat shaped specimen was investigated at high strain rate in this paper. Based on the Johnson‐cook constitutive model and fracture model, the interaction of temperature, stress and strain fields of AZ31B magnesium alloy with hat shaped specimen were numerically simulated by using ANSYS/LS‐DYNA software under different strain rates, which was validated by experiment. It is found that the plastic strain is highly concentrated on the corner of the hat shaped specimen, which leads to large localized deformation. The voids are nucleated and extended by compression stress. Work harden effect is caused by remained plastic strain, which is located around adiabatic shear band. The stress collapse is discovered in gauge section, which is also discovered in experiment. Thermal soften effect is suppressed with the strain rate increased.

show abstract

“…Automotive [1] and aerospace [2], as well as biomechanics [3,4], are just a few examples of the main research and industry branches aimed at advanced lightweight materials, the everlasting research and development of which has resulted in the design of new innovative Mg-based alloys and their production technologies [5]. The mechanical and physical properties are not the greatest advantages of pure Mg; however, they can both be improved by structural unit refinement and the addition of alloying elements [6].…”

Section: Introductionmentioning

confidence: 99%

Comprehensive Characterisation of a Newly Developed Mg–Dy–Al–Zn–Zr Alloy Structure

Kunčická

Kocich

2018

Metals

View full text Add to dashboard Cite

This is a report on the structure phases and precipitates in a newly developed Mg-10Dy-3Al-1Zn-0.2Zr alloy. Specimens from the cast alloy were heat treated at temperatures of 480 • C, 520 • C and 560 • C, all for 8 and 16 h, and subsequently quenched. The structures were then analysed using scanning and transmission electron microscopy, while the mechanical properties were investigated using microhardness measurements. The results showed the different temperatures, as well as times, influence both the chemical composition and morphology of the precipitated phases. The occurrence of the β-phase changed with increasing temperature and time from grain boundary segregations through fine elongated particles to coarse plate-like precipitates. Polygon-shaped Dy-rich precipitates were observed in all the samples; however, their size decreased and their distribution homogenised with increasing annealing temperature and time. The samples annealed at 520 • C and 560 • C exhibited the presence of lamellar 18R-type long period stacking ordered (LPSO) phases. Microhardness measurements were in accordance with results of the microscopic analyses; although the values varied between 60 and 65 HV for all the material states, the most uniform distribution was observed for the 560 • C/8-h sample, which featured the finest precipitates and LPSO phases.

show abstract

Towards magnesium alloys for high-volume automotive applications

Cited by 602 publications

References 62 publications

Corrosion Inhibition Study of Aqueous Vanadate on Mg Alloy AZ31

Corrosion Inhibition Study of Aqueous Vanadate on Mg Alloy AZ31

Localized deform behavior of AZ31B magnesium alloy by numerical simulation

Comprehensive Characterisation of a Newly Developed Mg–Dy–Al–Zn–Zr Alloy Structure

Contact Info

Product

Resources

About