Rare Earth Based Magnesium Alloys—A Review on WE Series

Calado, Lénia M.; Carmezim, M.J.; Montemor, M.F.

doi:10.3389/fmats.2021.804906

Cited by 39 publications

(16 citation statements)

References 181 publications

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“…These improvements can be useful for the industrial applications of magnesium alloys in casting technology. Furthermore, it is worth saying that the additives used are relatively inexpensive solutions compared to modification using, for example, rare elements such as yttrium or scandium [6,40,41].…”

Section: Discussionmentioning

confidence: 99%

Influence of Alkaline Earth Metals on Structure Formation and Magnesium Alloy Properties

et al. 2022

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The main aim of this work is to improve the structure and properties of the magnesium alloy ML5 by modifying it with alkaline earth metals (ALM). The separate and joint influence of calcium and barium on the macrostructure and microstructure of the alloy of Mg-Al-Zn system was investigated. The qualitative and quantitative estimation of the structural components was carried out. Alkali earth metals were included in complex intermetallic phases and serve as additional crystallization centers. Modification of magnesium alloys with alkaline earth metals is established in an amount of 0.05 to 0.1 wt. % increased the bulk percentage of intermetallic phases by ~1.5 times, shifting them towards smaller size groups while simultaneously forming spherical intermetallic phases located in the grain centre and serving as additional crystallization centers. In this case, grain size reduction and significant refinement of the alloy structural components were provided. The dependency of the separate and joint influence of alkali earth metals on the castings complex of properties of the magnesium alloy has been established. Thus, a separate modification of the ML5 alloy provided the maximum level of its strength and ductility with the addition of 0.1% Ca or Ba. The modification of the complex (0.1% Ca + 0.1% Ba) of the magnesium alloy decreased the dimensions of its structural components 1.5 times and increased the strength of the alloy by 20%, the ductility by 2 times and the long-term heat resistance 1.5 times due to the formation of the intermetallic phases of the complex composition. Linear dependences were obtained that describe the influence of the characteristics of the structural components of the modified magnesium alloy on its mechanical properties. The developed technology for modifying cast magnesium alloys with alkaline earth elements provides an improvement in casting quality and allows the reliability and durability of responsible casting operation.

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Section: Discussionmentioning

confidence: 99%

Influence of Alkaline Earth Metals on Structure Formation and Magnesium Alloy Properties

et al. 2022

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“…Magnesium alloys emerged as a promising candidate for lightweight structural materials [1][2][3][4] in engineering applications due to their low density [5], high specific strength [6], good damping [7,8] and electromagnetic shielding [9,10]. The magnesium alloys have the potential for wide application fields such as aerospace, automotive, and telecommunications [11][12][13].…”

Section: Introductionmentioning

confidence: 99%

Effect of T4 treatment on the corrosion resistance of Mg-4Al-6Er-0.3Mn alloy

Liang,

Ma,

Qin

et al. 2024

Mater. Res. Express

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The Mg-Al alloys exhibit poor corrosion resistance when they exposed to Cl- attack. To solve this problem, Erbium (Er) and Manganese (Mn) are added to the Mg-4Al alloy and the Mg-4Al-6Er-0.3Mn is T4 treated to enhance the corrosion resistance of the alloy. Then the corrosion behaviors of the as-extruded alloy and the T4 alloy are investigated in this paper. It is found that the effective cathode Mg17Al12 is significantly reduced in the alloy due to the precipitation of Mg17Al12 being suppressed by Al2Er and the dissolution of the Mg17Al12 in the alloy. It is observed that the corrosion products transform from needle-like to tetrahedral-shaped corrosion products during the transformation process, which leads to severe pit corrosion. The results show that the T4 treatment can delay the transformation of the morphologies of the corrosion products, thereby improved the alloy corrosion resistance during the early stages of corrosion.

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“…In order to improve such poor corrosion performance of the Mg-based alloys a different treatments could be used, as surface modification [16]. In the field of materials science it is also possible to improve by addition new elements, especially rare earth (RE) ones [17][18][19]. The potential of RE addition was proved and described e.g.…”

Section: Introductionmentioning

confidence: 99%

Investigations on the Microstructure and Corrosion Performance of Different WC-Based Cermet Coatings Deposited by High Velocity Oxy Fuel Process onto Magnesium Alloy Substrate

Jonda¹,

Łatka²,

Maciej³

et al. 2023

Adv. Sci. Technol. Res. J.

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In the field of surface engineering, thermal spraying is very wide adopted in many branches of the industry. The main reasons of such situation are its flexibility as well as cost effectiveness. Among others, high velocity oxy fuel (HVOF) technique is dedicated for spraying hardmetal and cermet coatings, especially for wear-and corrosion resistance. Such type of coating could be a promising candidate as protective layer for magnesium alloys elements. These materials need a strong improvement in the corrosion protection as well as on the field of wear resistance in order to be widely used in the industry. In this work, different WC-based coatings, namely: (i) WC-Co, (ii) WC-Co-Cr and (iii) WC-Cr 3 C 2 -Ni manufactured by HVOF spraying, were investigated. The form of all feedstock materials was agglomerated and sintered powder. All coatings were sprayed with the same technological parameters, especially spray distance which was equal to 400 mm on the AZ91 magnesium alloy substrate. The main aim of the studies was to investigate the influence of the powder material on the corrosion resistance of obtained coatings. The manufactured coatings were examined in terms of its microstructure, using scanning electron microscope (SEM) and corrosion performance, which was assessed in the electrochemical corrosion investigations in 3.5% NaCl solution by Tafel method. The study showed that the corrosion resistance increasing in such order: AZ91 < WC-Cr 3 C 2 -Ni < WC-Co < WC-Co-Cr. It should be stressed that WC-Cr 3 C 2 -Ni coating exhibits very low corrosion performance, which could be effected by relatively high porosity (c.a. 3 vol.%) and because of that the more complex composition promotes creation of many corrosion cells.

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Rare Earth Based Magnesium Alloys—A Review on WE Series

Cited by 39 publications

References 181 publications

Influence of Alkaline Earth Metals on Structure Formation and Magnesium Alloy Properties

Influence of Alkaline Earth Metals on Structure Formation and Magnesium Alloy Properties

Effect of T4 treatment on the corrosion resistance of Mg-4Al-6Er-0.3Mn alloy

Investigations on the Microstructure and Corrosion Performance of Different WC-Based Cermet Coatings Deposited by High Velocity Oxy Fuel Process onto Magnesium Alloy Substrate

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