A High-Ductility Mg–Zn–Ca Magnesium Alloy

Tu, Teng; Chen, Xianhua; Chen, Jiao; Zhao, Chaoyue; Pan, Fusheng

doi:10.1007/s40195-018-0804-7

Cited by 38 publications

(9 citation statements)

References 42 publications

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“…In recent years, transportation sectors have been making more and more efforts to reduce vehicle weight because energy conservation and emission reduction are economically and environmentally beneficial [1,2]. In such context, magnesium alloys have attracted extensive attention due to their unique low mass density [3]. After extrusion or rolling, magnesium alloys will exhibit better mechanical properties due to their refined microstructure and alleviated cast defects [4,5].…”

Section: Introductionmentioning

confidence: 99%

Effect of Pulsed Magnetic Field on the Residual Stress of Rolled Magnium Alloy AZ31 Sheet

Meng

Luo

et al. 2020

Acta Metall. Sin. (Engl. Lett.)

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A novel method of pulsed magnetic field (PMF) treatment was developed to eliminate the residual stress of rolled magnesium alloy AZ31 sheet in this study. The effect of PMF on residual stress of rolled AZ31 sheet was investigated and its mechanism was analyzed. The experimental results revealed that the pulse frequency had a significant impact on residual stress. After 10.0 Hz PMF treatment, the average and maximum reduction rates of residual stress along the rolled direction were 26.6% and 30.3%, respectively. It was found that the dislocation density and parallel dislocation in grains of the rolled sheet increased after it was treated by the pulsed magnetic field. The simulation results showed that the Lorentz force generated by the pulsed magnetic field can lead to basal slip, thereby resulting in local plastic deformation. Besides, the Joule heat produced during the PMF treatment was conducive to the elimination of residual stress.

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Section: Introductionmentioning

confidence: 99%

Effect of Pulsed Magnetic Field on the Residual Stress of Rolled Magnium Alloy AZ31 Sheet

Meng

Luo

et al. 2020

Acta Metall. Sin. (Engl. Lett.)

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“…However, it is generally recognized that the strain hardening rate shows a falling curve when the dislocation slip is predominant in the deformation process. Deformation was governed by twinning when the strain hardening rate exhibited three differentiable stages, and showed a clear increase in middle . As shown in Figure a, it is clear that the dislocation slip plays a dominant role in the strain hardening of as‐extruded Mg – Al alloys.…”

Section: Discussionmentioning

confidence: 93%

Strain Hardening Behavior in Mg–Al Alloys at Room Temperature

et al. 2018

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The effect of Al on the strain hardening behavior of as-extruded Mg-xAl (x ¼ 1, 2, 3 and 4 wt%) magnesium alloys is investigated using uniaxial tensile tests at 10 À3 s À1 at room temperature. The strain hardening rate, the strain hardening exponent, and the hardening capacity are obtained from true stress-true plastic strain curves. In as-extruded Mg-Al alloys, the Al element is completely dissolved in the α-Mg matrix. With increasing Al content, the average grain sizes of these samples decrease from 16.9 to 10.7 mm. The strain hardening rate increases from 515 to 924 MPa, then reduces to 818 MPa at (σ-σ 0.2 ) ¼ 90 MPa. The strain hardening exponent n increases from 0.125 to 0.149 and then reduces to 0.142, while the hardening capacity Hc increases from 0.71 to 0.90 and then reduces to 0.80. The train hardening rate, the strain hardening exponent n, and hardening capacity Hc reach peak value in Mg-3Al. The difference in the strain hardening responses of asextruded Mg-Al alloys may mainly be influenced by weaker basal texture and smaller average grain size with increasing Al content.

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“…In contrast, the preferential orientation for the unDRXed coarse-grain regions with a strong basal texture (I max : ~ 32.49 mud in Fig. 9d-f) are oriented toward ED, which is not conducive to the activation of basal slip under plastic deformation along the ED and results in a sharp fiber texture [38]. Zengin et al [39] found that the crystal orientation of the coarse deformed grain in the as-extruded Mg-Zn-Y-La-Zr alloy was unconducive to the initiation of basal slip when the plastic deformation occurs along the extruded direction, which contributes to the formation of the fiber texture.…”

Section: Texturementioning

confidence: 93%

Microstructure, Tensile Properties and Work Hardening Behavior of an Extruded Mg–Zn–Ca–Mn Magnesium Alloy

Nie

Zhu

Munroe

et al. 2020

Acta Metall. Sin. (Engl. Lett.)

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A new Mg-2.2 wt% Zn alloy containing 1.8 wt% Ca and 0.5 wt% Mn has been developed and subjected to extrusion under different extrusion parameters. The finest (~ 0.48 μm) recrystallized grain structures, containing both nano-sized MgZn 2 precipitates and α-Mn nanoparticles, were obtained in the alloy extruded at 270 °C/0.01 mm s −1 . In this alloy, the deformed coarse-grain region possessed a much stronger texture intensity (~ 32.49 mud) relative to the recrystallized fine-grain region (~ 13.99 mud). A positive work hardening rate in the third stage of work hardening curve was also evident in the alloy extruded at 270 °C, which was related to the sharp basal texture and which provided insufficient active slip systems. The high work hardening rate in the fourth stage contributed to the high ductility extruded at 270 °C/1 mm s −1 . This alloy exhibited a weak texture, and the examination of fracture surface revealed highly dimpled surfaces. The optimum tensile strength was achieved in the alloy extruded at 270 °C/0.01 mm s −1 , and the yield strength, ultimate tensile strength and elongation to failure were ~ 364.1 MPa, ~ 394.5 MPa and ~ 7.2%, respectively. Fine grain strengthening from the recrystallized fine-grain region played the greatest role in the strength increment of this alloy compared with Orowan strengthening and dislocation strengthening in the deformed coarse-grain regions.

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A High-Ductility Mg–Zn–Ca Magnesium Alloy

Cited by 38 publications

References 42 publications

Effect of Pulsed Magnetic Field on the Residual Stress of Rolled Magnium Alloy AZ31 Sheet

Effect of Pulsed Magnetic Field on the Residual Stress of Rolled Magnium Alloy AZ31 Sheet

Strain Hardening Behavior in Mg–Al Alloys at Room Temperature

Microstructure, Tensile Properties and Work Hardening Behavior of an Extruded Mg–Zn–Ca–Mn Magnesium Alloy

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