Microstructure, Mechanical Properties, and Corrosion Behavior of Mg–Al–Ca Alloy Prepared by Friction Stir Processing

Wang, Wen; Chen, Shanyong; Qiao, Ke; Peng, Pai; Han, Pengcheng; Wu, Bing; Wang, Chenxi; Wang, Jia; Wang, Yuhao; Wang, Kuaishe

doi:10.1007/s40195-021-01300-7

Cited by 13 publications

(3 citation statements)

References 38 publications

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“…Simultaneously, the rapid stirring motion of the pin causes the material to undergo substantial plastic deformation. The FSP can homogenize and densify the microstructure of the material as well as refine the grains, resulting in the improvement of material properties [17][18][19]. FSP has the following advantages over other methods.…”

Section: Introductionmentioning

confidence: 99%

AZ91 Magnesium Alloy CMT Cladding Layer Processed Using Friction Stir Processing: Effect of Traverse Speed on Microstructure and Mechanical Properties

Zhao,

Shen,

et al. 2024

Materials

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Friction stir processing (FSP) is a solid-state treating method to enhance the mechanical properties of materials by altering their microstructure. In this study, FSP was applied to the AZ91 magnesium alloy cladding layer prepared using cold metal transition (CMT) technology, and the purpose was to investigate the effect of the traverse speed of the H13 steel stirring head under a constant rotation speed on the microstructure and mechanical properties of the cladding layer. The results demonstrated that FSP could effectively decrease the grain size of the cladding layer and lead to the dispersion and dissolution of the coarse β-Mg17Al12 second phase into the α-Mg matrix. The mechanical characteristics of the processed cladding layer were significantly enhanced compared to the unprocessed cladding layer due to the grain refinement and second-phase strengthening induced by FSP. When the stirring head rotation speed was set at 300 r/min, the average microhardness and tensile properties of the specimens showed a tendency of initially increasing and then dropping as the traverse speed increased. The cladding layer, obtained at a traverse speed of 60 mm/min, displayed optimal mechanical properties with an average microhardness, tensile strength, and elongation of 85.6 HV0.1, 278.5 MPa, and 13.4%, respectively.

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Section: Introductionmentioning

confidence: 99%

AZ91 Magnesium Alloy CMT Cladding Layer Processed Using Friction Stir Processing: Effect of Traverse Speed on Microstructure and Mechanical Properties

Zhao,

Shen,

et al. 2024

Materials

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“…In addition to mechanical properties, corrosion resistance of RE-containing magnesium alloys is another important issue [22,23]. It is generally believed that the micro-galvanic corrosion between the second phase and the magnesium matrix is a key factor affecting the corrosion resistance of the magnesium alloy [24][25][26][27][28]. Some studies show that the addition of Gd and Y can improve the microstructure of magnesium alloys and weaken the micro-galvanic corrosion.…”

Section: Introductionmentioning

confidence: 99%

Comparative Study on Corrosion Behavior and Mechanism of As-Cast Mg–Zn–Y and Mg–Zn–Gd Alloys

Zhao

et al. 2022

Acta Metall. Sin. (Engl. Lett.)

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Rare earth (RE) elements have large solid solubility in magnesium and are widely used to regulate the microstructure and property of advanced magnesium alloys. However, different kinds of RE elements have different effects on microstructure and property of the alloy. In this study, a Mg-Zn-Y alloy and a Mg-Zn-Gd alloy with alloying elements of the same atomic percentage were designed to clarify the effect of yttrium (Y) and gadolinium (Gd) on the corrosion behavior of as-cast MgZn 2 Y 2.66 and MgZn 2 Gd 2.66 alloys. The results show that the MgZn 2 Y 2.66 alloy is mainly composed of α-Mg phase and long period stacking ordered (LPSO) phase, while MgZn 2 Gd 2.66 alloy is mainly composed of α-Mg phase and (Mg, Gd) 3 Zn phase (W phase). Generally speaking, the corrosion phenomena of the two alloys in 3.5 wt% NaCl solution are similar. In the early stages of exposure, the alloys underwent uniform corrosion at a relatively low corrosion rate. With prolonged exposure, localized corrosion became dominated and the corrosion rate was greatly increased. However, the corrosion rate of the MgZn 2 Y 2.66 alloy, in terms of the corrosion current density, is about one order of magnitude lower than that of the MgZn 2 Gd 2.66 alloy. The high corrosion resistance of the MgZn 2 Y 2.66 alloy is mainly attributed to the presence of LPSO phase in form of continuous networks and the relatively high corrosion resistance of the corrosion product layer on the alloy.

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“…However, the corrosion behavior of Mg–Al alloys reported thus far has mostly focused on NaCl solution [ 29 ]. In addition, there has been limited research on corrosion of Mg–Al–Ca alloys, and all the known studies were carried out in NaCl solution [ 30 ]. The human body fluid contains many ions, such as chloride, phosphate, carbonate, sulfate, etc.…”

Section: Introductionmentioning

confidence: 99%

Microgalvanic Corrosion of Mg–Ca and Mg–Al–Ca Alloys in NaCl and Na2SO4 Solutions

Yang

Feng

et al. 2021

Materials

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As a kind of potential biomedical material, Mg–Ca alloy has attracted much attention. However, the role of Ca-containing intermetallics in microgalvanic corrosion is still controversial. In 0.6 mol/L NaCl and Na2SO4 solutions, the microgalvanic corrosion behavior of the second phase and Mg matrix of Mg–Ca and Mg–Al–Ca alloys was examined. It was confirmed that the Mg2Ca phase acts as a microanode in microgalvanic corrosion in both NaCl and Na2SO4 solutions, with the Mg matrix acting as the cathode and the Al2Ca phase acting as the microcathode to accelerate corrosion of the adjacent Mg matrix. It was also found that Cl− and SO42− have different sensibilities to microgalvanic corrosion.

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Microstructure, Mechanical Properties, and Corrosion Behavior of Mg–Al–Ca Alloy Prepared by Friction Stir Processing

Cited by 13 publications

References 38 publications

AZ91 Magnesium Alloy CMT Cladding Layer Processed Using Friction Stir Processing: Effect of Traverse Speed on Microstructure and Mechanical Properties

AZ91 Magnesium Alloy CMT Cladding Layer Processed Using Friction Stir Processing: Effect of Traverse Speed on Microstructure and Mechanical Properties

Comparative Study on Corrosion Behavior and Mechanism of As-Cast Mg–Zn–Y and Mg–Zn–Gd Alloys

Microgalvanic Corrosion of Mg–Ca and Mg–Al–Ca Alloys in NaCl and Na2SO4 Solutions

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