Effects of content and distribution of Zn and Gd on formation ability of I phase and W phase in Mg‒Zn‒Gd‒Zr alloy

Guo, Feng; Fang, Liqiang; Zhao, Xueping; Li, Yuguang; Cai, Huisheng

doi:10.1016/j.jallcom.2020.158543

Cited by 16 publications

(1 citation statement)

References 35 publications

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“…The secondary phases formed by adding Gd or Er elements could act as heterogeneous nucleation sites, especially the W phase and I phase. The I phase changes the texture through a discontinuous dynamic recrystallization (DDRX) mechanism, while the W phase refines the grain size through continuous dynamic recrystallization (CDRX) [16][17][18]. Moreover, the solid solubility of Gd and Er elements in Mg alloy decreased significantly with the decrease in temperature, and the trace of Gd and Er can observably refine the precipitates and increase their number density, which has an outstanding precipitation strengthening and solution strengthening [13,19].…”

Section: Introductionmentioning

confidence: 99%

Hot Compression Mechanical Behavior of Solution Heat-Treated and Pre-aged Mg–Zn–Gd–Er Alloys

Che

Lu²,

Liu³

et al. 2022

Acta Metall. Sin. (Engl. Lett.)

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The mechanical behavior of solution heat-treated and pre-aged Mg-6Zn-1Gd-1Er alloys during hot compression (from 180 to 330 °C) has been investigated. The results showed that the flow stress curves of the pre-aged sample (PAS) intersected with that of the solution heat-treated sample (SHTS) during hot compression. At 180 °C, when the true strain is 0.27 and 0.47, the PAS showed larger and smaller stress (210.80 MPa vs. 207.58 MPa and 205.67 MPa vs. 207.93 MPa) than the SHTS, respectively. These phenomena were due to the stronger interaction of W phase and dislocations/twins under the strain of 0.27, while dynamic recrystallization softening occurred under the strain of 0.47. When the temperature increased to 330 °C, the flow stress of PAS and SHTS showed an opposite trend to that of 180 °C. Continuous dynamic recrystallization and particle stimulated nucleation based on slip operations are the main deformation mechanisms under 330 °C. At the true strain is 0.33 and 0.53, the PAS has smaller and larger stress (61.32 MPa vs. 63.69 MPa and 58.75 MPa vs. 57.09 MPa) than the SHTS, respectively. The increasing deformation resistance of dynamic precipitation improved the flow stress under smaller strain and dynamic recrystallization decreased the flow stress under high strain, which resulted the opposite phenomena of SHTS.

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Section: Introductionmentioning

confidence: 99%

Hot Compression Mechanical Behavior of Solution Heat-Treated and Pre-aged Mg–Zn–Gd–Er Alloys

Che

Lu²,

Liu³

et al. 2022

Acta Metall. Sin. (Engl. Lett.)

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Effect of neodymium doping on structural, optical, and dielectric properties of Ni ferrites synthesized by citrate gel auto-combustion method

Shanthakumari,

kumar,

Edukondalu

et al. 2023

J Mater Sci: Mater Electron

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Influence of Er/Fe Substitution on Mg-Zn Nanoparticles’ Electromagnetic Properties and Applications

Baburao

Kumar²,

Edukondalu

et al. 2023

Braz J Phys

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Mg 0.8 Zn 0.2 Er x Fe 2-x O 4 (x = 0.00, 0.005, 0.01, 0.015, 0.02, and 0.025) nanoparticles made using the citrate gel autocombustion process were examined for their structure, morphology, and behavior. The single-phase cubic spinel structure was formed according to the diffraction pattern. Observations revealed that as the Er focus went from to 0.0 to 0.025, the average crystallite size ( D ) increased from 12.4 to 18.6 nm. The findings of the SEM and EDAX analyses reveal that the particles are uniform, with just a little amount of agglomeration and no impurity pickup. Nanoparticles from transmission electron microscopes (TEM) were present, the range from 12 to 19 nm. In IR spectroscopy using the Fourier transform (FTIR), nearly all the spinel ferrites presented generate two absorption bands that have wavelengths of around 400 cm and 600 cm. The BET surface area of the Er 3+ ion doping Zn-Mg ferrites rises from 23.860 m 2 /gm to 29.845 m 2 /gm. The TG–DTA analysis of the prepared samples confirms the thermal stability of the samples; the temperature ranges from 100 to 750 °C.The transition temperature (Seebeck coefficient) of the samples was studied using thermoelectric power (TEP) measurement studies, and it was found that all the samples showed N-type semiconductor behavior. With an increase in erbium concentration, DC conductivity decreases. At room temperature, the magnetic characteristics of hysteresis loops, squareness ratio (SQR), anisotropy constant (K), magnetic moment (), coercivity (Hc), saturation magnetization (Ms), and retentivity (Mr) were examined. When erbium concentration rises, the magnetic moment (B) increases. The saturation magnetization values were 288.4615 and 244.5266 emu/g, and squareness ratio values from 0.01554 to 0.03303 were observed. These materials are converted from hard permanent magnet materials to soft magnet materials.

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Effects of content and distribution of Zn and Gd on formation ability of I phase and W phase in Mg‒Zn‒Gd‒Zr alloy

Cited by 16 publications

References 35 publications

Hot Compression Mechanical Behavior of Solution Heat-Treated and Pre-aged Mg–Zn–Gd–Er Alloys

Hot Compression Mechanical Behavior of Solution Heat-Treated and Pre-aged Mg–Zn–Gd–Er Alloys

Effect of neodymium doping on structural, optical, and dielectric properties of Ni ferrites synthesized by citrate gel auto-combustion method

Influence of Er/Fe Substitution on Mg-Zn Nanoparticles’ Electromagnetic Properties and Applications

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