Hot Compression Deformation Behavior and Processing Maps of Mg-Gd-Y-Zr Alloy

Chen, Bin; Zhou, Weimin; Li, Song; Li, Xiaoling; Lü, Chen

doi:10.1007/s11665-013-0568-1

Cited by 27 publications

(15 citation statements)

References 25 publications

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“…Accordingly, the orientation maps of the grains after SPT at 450 °C were obtained by EBSD and the results are shown in In comparing with earlier studies of Mg-Gd-Y alloys, it is noted that the present results are consistent with those reported for other similar alloys [16][17][18][19][20]. For example, it was reported that grain growth occurs at 500 °C in an extruded Mg-8.90Gd-5.11Y-3.10Zn-0.47Zr alloy but fine DRX grains form at 400 °C [19].…”

Section: Microstructural and Textural Evolution After Sptsupporting

confidence: 90%

“…For example, it was reported that grain growth occurs at 500 °C in an extruded Mg-8.90Gd-5.11Y-3.10Zn-0.47Zr alloy but fine DRX grains form at 400 °C [19]. Also, the temperature range of 375-450 °C was suggested earlier as the appropriate temperature range for DRX of an as-cast and homogenized Mg-9.3Gd-2.9Y-0.3Zr alloy [17]. A microstructural characterization of a hot compressed as-cast binary Mg-1.5Gd alloy at 400 °C also revealed the local occurrence of DRX at the original grain boundaries and the development of necklace-like structures [32].…”

Section: Microstructural and Textural Evolution After Sptmentioning

confidence: 96%

“…Generally, discontinuous dynamic recrystallization (DDRX) has been invoked as the most important microstructural restoration process in Mg-Gd-Y alloys at elevated temperatures and a summary of the experimental conditions used in these reports is given in Table1 where all data relate to hot compression [16][17][18][19][20]. The processing condition, the resultant grain size where reported, the testing temperature and the strain rate ranges are all listed in Table1 and inspection shows that most reports relate to alloys in the cast condition and there is only one investigation of an Mg-Gd-Y alloy in the extruded condition [19].…”

Section: Introductionmentioning

confidence: 99%

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Microstructural evolution during hot shear deformation of an extruded fine-grained Mg–Gd–Y–Zr alloy

et al. 2017

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Abstract:Mg-Gd-Y-Zr alloys are among recently developed Mg alloys having superior mechanical properties at elevated temperatures. Dynamic recrystallization (DRX) and rare earth (RE)-rich particles play important roles in enhancing the high temperature strength of these alloys. Accordingly, the microstructural evolution of a fine grained extruded Mg-5Gd-4Y-0.4Zr alloy was investigated after hot shear deformation in the temperature range of 350-450 °C using the shear punch testing (SPT) method. The results reveal the occurrence of partial dynamic recrystallization at the grain boundaries at 350 °C while the fraction of DRX grains increases with increasing deformation temperature. A fully-recrystallized microstructure was achieved after SPT at 450 °C. The Gd-rich and Y-rich cuboid particles, having typical sizes in the range of ~50 nm to ~3 m, show excellent stability and compatibility after hot shear deformation and these particles enhance the high temperature strength during hot deformation at elevated temperatures. The textural evolution, examined using electron backscattered diffraction (EBSD), revealed a non-fibrous basal DRX texture after SPT which is different from the conventional deformation texture.

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Section: Microstructural and Textural Evolution After Sptsupporting

confidence: 90%

Section: Microstructural and Textural Evolution After Sptmentioning

confidence: 96%

Section: Introductionmentioning

confidence: 99%

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Microstructural evolution during hot shear deformation of an extruded fine-grained Mg–Gd–Y–Zr alloy

et al. 2017

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“…The first and second terms of the activation energy Q (equation (2) The calculated value of Q is 234.553095 kJ·mol −1 . Lastly, the value of A was determined to be 1.26608×10 16 by the slope of equation (5), as shown in figure 3. By substituting Q value in equation (8), the values of n and A3 can be obtained.…”

Section: Building Constitutive Equationsmentioning

confidence: 99%

Thermal compression, processing maps and microstructural evolution of as-cast Mg-Gd-Y-Zn-Zr alloy with long period stacking ordered phase

Zhang¹,

Luo²,

Zhao³

et al. 2020

Mater. Res. Express

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Thermal deformation of Mg-7.5Gd-2.5Y-1.5Zn-0.5Zr (wt%) as-cast alloy containing LPSO phase was been studied in a temperature range from 623 K to 723 K and a strain rate range from 0.001 to 1 s −1 . The microstructural evolution at the various strain rates was also analyzed. The results show that the flow stress decreases significantly with the increase of the deformation temperature. But the peak flow stresses of the alloy increase significantly at high deformation temperature, due to existing both the plentiful lamellar LPSO phase and the fine dynamic DRXed grains. Under the high strain rate conditions, the LPSO phase distorted and formed kink bands. The deformational activation energy (Q) of the alloy is about 234.6 kJ·mol −1 . This high Q value mainly owe to profuse lamellar LPSO phase hindering the movement of atoms. With the observation of established processing map of the alloy, some good thermal workabilities are observed in following zones: 723 K, 0.001<ε<1 s −1 ; and the zone with middle temperature and moderate strain rate condition, 673 K, 0.01<ε<0.1 s −1 . The thermal deformation instability zones are mainly located in the region with high strain rate and lower temperature.

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“…The low density, high specific strength and favorable recycling capability of magnesium alloys are particularly suitable for lightweight applications such as in the fields of automotive, aircraft industries, and electronic products [1][2]. However, their ductility and formability are very poor at room temperature due to their hexagonal close-packed crystal structure and the limited number of activated slip systems [3][4][5][6][7].…”

Section: Introductionmentioning

confidence: 99%

Hot Compression Deformation Behavior of the Mg-5Sn-2.5Pb Magnesium Alloy

Xie¹,

Zhu²,

Jin³

2014

Proceedings of the 2015 International Conference on Material Science and Applications

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Compressive deformation behavior of Mg-5Sn-2.5Pb magnesium alloy was investigated at the temperature range from 250 to 450°C , strain rate range from 0.001 to 10s-1 and the maximum deformation degree of 60% on Gleeble-3500 thermal simulator. The constitutive equations were established by taking peak stresses as the function of temperatures and strain rates. The results show that the flow stress significantly affected by deformation temperature and strain rate, and the flow stress decreases with the increase of deformation temperature and the decrease of strain rate. The deformation activation energy and stress exponent were evaluated by the hyperbolic-sine mathematics model and the hot deformation constitutive equation was established.

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Hot Compression Deformation Behavior and Processing Maps of Mg-Gd-Y-Zr Alloy

Cited by 27 publications

References 25 publications

Microstructural evolution during hot shear deformation of an extruded fine-grained Mg–Gd–Y–Zr alloy

Microstructural evolution during hot shear deformation of an extruded fine-grained Mg–Gd–Y–Zr alloy

Thermal compression, processing maps and microstructural evolution of as-cast Mg-Gd-Y-Zn-Zr alloy with long period stacking ordered phase

Hot Compression Deformation Behavior of the Mg-5Sn-2.5Pb Magnesium Alloy

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