Microstructure, texture, mechanical properties and electromagnetic shielding effectiveness of Mg–Zn–Zr–Ce alloys

Liu, Lizi; Chen, Xianhua; Pan, Fusheng; Tang, Aitao; Wang, Xiaolong; Liu, Juan; Gao, Shangyu

doi:10.1016/j.msea.2016.05.098

Cited by 72 publications

(19 citation statements)

References 32 publications

(41 reference statements)

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“…Wrought ZK60 alloys possess the best combination of room temperature strength and ductility among the available wrought Mg alloys [12]. Moreover, this alloy is known to be a suitable alloy for hot deformation and fabrication of wrought products [13][14][15][16][17][18][19][20][21][22] where DRX dominates microstructural evolution during hot deformation [23][24][25][26][27]. However, various studies have reported a bimodal grain microstructure consisting of fine recrystallized grains and elongated unrecrystallized ones, which resulted from hot deformation of ZK60 alloy due to partial DRX [25][26][27][28][29].…”

Section: Introductionmentioning

confidence: 99%

Bimodal grain microstructure development during hot compression of a cast-homogenized Mg-Zn-Zr alloy

Hadadzadeh

Mokdad

Amirkhiz

et al. 2018

Materials Science and Engineering: A

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Hot deformation of a cast-homogenized ZK60 alloy was studied by compression at a temperature of 450°C and a strain rate of 0.001s -1 to investigate microstructural evolution. The deformed microstructure was characterized using electron backscatter diffraction (EBSD) and high resolution transmission electron microscopy (HRTEM). EBSD observations of the deformed microstructure showed that hot deformation of this alloy resulted in a bimodal grain microstructure consisting of large pancaked unrecrystallized dendrites surrounded by recrystallized equiaxed fine grains. HRTEM studies revealed the presence of nano-(Zn-Zr)precipitates in the deformed microstructure. Due to the coherency of precipitates/matrix, the dislocations were pinned by the nano-precipitates inside the unrecrystallized grains and the dislocation motion inside the grains was impeded, hence, a substructure evolved. Consequently, dynamic recrystallization (DRX) was suppressed and deformation was concentrated inside the DRXed region.

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Section: Introductionmentioning

confidence: 99%

Bimodal grain microstructure development during hot compression of a cast-homogenized Mg-Zn-Zr alloy

Hadadzadeh

Mokdad

Amirkhiz

et al. 2018

Materials Science and Engineering: A

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“…With increasing extrusion speeds, the types of all the main phases are not changed, indicating that extrusion speed hardly influences the phase composition of Mg substrate in the composite rods. It has been reported that particles such as I phase probably plays an important role in the nucleation of the new grains rather than the suppression of the grain growth, and W phase could impede the migration of sub-grain and high-angle grain boundary to some degree [29,30], thereby causing high dislocation density and internal energy around the dispersed W phase produced by large amounts of deformation, which is favorable to nucleation of dynamically recrystallization [31]. Furthermore, large amounts of broken W phase, which is dispersed evenly in the interior of grains or grain boundaries in the Mg sleeve [28], can also suppress the growth of recrystallized grains by retarding the migration of the grain boundaries [32].…”

Section: Experimental Methodsmentioning

confidence: 99%

Influence of Extrusion Speed on the Microstructure Evolution, Interface Bonding and Mechanical Response of Mg MB26/Al 7075 Composite Rod

Zhang

Zhou

et al. 2018

Acta Metall. Sin. (Engl. Lett.)

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The Mg MB26/Al 7075 composite rod, in which Mg MB26 serves as the sleeve and Al 7075 serves as the core, is fabricated via the process of co-extrusion. The influence of extrusion speed on the microstructure evolution, interface bonding and mechanical response of the Mg MB26/Al 7075 composite rod is investigated. The results show that the typical extrusion texture of Mg sleeve does not change during co-extrusion; however, the average grain size in the Mg sleeve slightly changes from 1.57 lm in the case of extrusion speed of 0.3 mm/s to 2.78 lm in the case of extrusion speed of 2.1 mm/s. The thickness of interface transition layer increases significantly from 5.5 to 50 lm, and therefore, the interface bonding becomes deteriorative with increasing extrusion speed; in particular, many cavities emerge in the case of 1.2 and 2.1 mm/s.

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“…At present, most of the researches on the electromagnetic shielding properties of magnesium with rare earth (RE) have already been carried out [3,5,9,17,18]. For example, Chen et al explored the different Nb contents on the electromagnetic interference (EMI) shielding properties of an Mg-Y-Zr-Nd alloy, and it was found that the EMI shielding effectiveness of the alloy could be improved by the precipitated second phases of Mg24Y5, Mg41Nd5, and β phase with a Mg41Nd5Y composition [3]; Liu et al reported that Ce addition induced the formation of the Mn-Zn-Ce phase, which was beneficial to improve the SE [19]. However, the addition of RE increased the cost and density.…”

Section: Introductionmentioning

confidence: 99%

A Novel Processing for CNT-Reinforced Mg-Matrix Laminated Composites to Enhance the Electromagnetic Shielding Property

Zhang

Zhao

et al. 2021

Coatings

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The microstructure, electrical conductivity, and electromagnetic interference (EMI) shielding effectiveness (SE) of CNTs/Mg Matrix composites prepared by accumulative roll bonding (ARB) were systematically investigated to understand the effects of CNTs on the electromagnetic interference shielding effectiveness property of magnesium. A model based on the shielding of the electromagnetic plane wave was used to theoretically discuss the EMI shielding mechanisms of ARB-processed composites. The experimental results indicated that the methods were feasible to prepare laminated composites. The SE of the material increased gradually with the increase of electrophoretic deposition time. When the electrophoretic deposition time reached 8 min, the value of SE remained 87–95 dB in the frequency range of 8.2–12.4 GHz. The increase in SE was mainly attributed to the improvement in the reflection and multiple reflection losses of incident electromagnetic wave due to the increased amounts of CNTs and interfaces. The methods provided an efficient strategy to produce laminated metal matrix composites with high electromagnetic shielding properties.

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Microstructure, texture, mechanical properties and electromagnetic shielding effectiveness of Mg–Zn–Zr–Ce alloys

Cited by 72 publications

References 32 publications

Bimodal grain microstructure development during hot compression of a cast-homogenized Mg-Zn-Zr alloy

Bimodal grain microstructure development during hot compression of a cast-homogenized Mg-Zn-Zr alloy

Influence of Extrusion Speed on the Microstructure Evolution, Interface Bonding and Mechanical Response of Mg MB26/Al 7075 Composite Rod

A Novel Processing for CNT-Reinforced Mg-Matrix Laminated Composites to Enhance the Electromagnetic Shielding Property

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