Enhancing the Strength and Ductility in Mg–Zn–Ce Alloy through Achieving High Density Precipitates and Texture Weakening

Du, Yuzhou; Zheng, M.Y.; Qiao, Xiaoguang; Jiang, Bailing

doi:10.1002/adem.201700487

Cited by 7 publications

(5 citation statements)

References 54 publications

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“…Among rare-earth element, many researchers reported that micro-alloying Mg-Zn with yttrium or cerium exhibited a comparable ductility and formability with commercial magnesium alloys. Tables 3 and 4 summarize the mechanical properties of the published alloys in Mg-Zn-Y [154][155][156][157] and Mg-Zn-Ce [48,71,81,85,[156][157][158], respectively. The addition of yttrium to Mg-Zn alloys enhances the formation of magnesium solid solution in ternary systems due to high solid solubility of yttrium in magnesium.…”

Section: Mechanical Properties Of Mg-zn-{ce Y} Alloysmentioning

confidence: 99%

Thermodynamic Modeling and Mechanical Properties of Mg-Zn-{Y, Ce} Alloys: Review

2021

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Magnesium alloys are a strong candidate for various applications in automobile and aerospace industries due to their low density and specific strength. Micro-alloying magnesium with zinc, yttrium, and cerium enhances mechanical properties of magnesium through grain refinement and precipitation hardening. In this work, a critical review of magnesium-based binary systems including Mg-Zn, Mg-Y, Mg-Ce, Zn-Y, and Zn-Ce is presented. Based on the CALPHAD approach and first-principles calculations, thermodynamic modeling of Mg-Zn-Y and Mg-Zn-Ce ternary phase diagrams have been summarized. The influence of micro-alloying (yttrium and cerium) on the mechanical properties of magnesium is discussed. A comparison between mechanical properties of magnesium commercial alloys and magnesium–zinc–{yttrium and cerium} have been summarized in tables.

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Section: Mechanical Properties Of Mg-zn-{ce Y} Alloysmentioning

confidence: 99%

Thermodynamic Modeling and Mechanical Properties of Mg-Zn-{Y, Ce} Alloys: Review

2021

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“…Currently, thermodynamic analysis of Mg-Zn-Ce-Zr alloys (Mg-rich angular region) gives information on the formation temperature, transformation reaction equations, and structure of various compounds [12,13]. The addition of Ce improves the yield strength (YS), ultimate tensile strength (UTS), and ductility of the alloy by refining the grains [14], promoting the formation of dynamic recrystallization, forming high density precipitation, and weakening the weave [15]. The mixed addition of Ce and other elements (Y, Ca, etc.)…”

Section: Introductionmentioning

confidence: 99%

The Effect of (Mg, Zn)12Ce Phase Content on the Microstructure and the Mechanical Properties of Mg–Zn–Ce–Zr Alloy

Guo

Cai

et al. 2022

Materials

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The quantitative study of rare earth compounds is important for the improvement of existing magnesium alloy systems and the design of new magnesium alloys. In this paper, the effective separation of matrix and compound in Mg–Zn–Ce–Zr alloy was achieved by a low-temperature chemical phase separation technique. The mass fraction of the (Mg, Zn)12Ce compound was determined and the effect of the (Mg, Zn)12Ce phase content on the heat deformation organization and properties was investigated. The results show that the Mg–Zn–Ce compound in both the as-cast and the homogeneous alloys is (Mg, Zn)12Ce. (Mg, Zn)12Ce phase formation depends on the content and the ratio of Zn and Ce elements in the initial residual melt of the eutectic reaction. The Zn/Ce mass ratios below 2.5 give the highest compound contents for different Zn contents, 5.262 wt.% and 7.040 wt.%, respectively. The increase in the amount of the (Mg, Zn)12Ce phase can significantly reduce the critical conditions for dynamic recrystallization formation. Both the critical strain and the stress decrease with increasing rare earth content. The reduction of the critical conditions and the particle-promoted nucleation mechanism work together to increase the amount of dynamic recrystallization. In addition, it was found that alloys with 6 wt.% Zn elements tend to undergo a dynamic recrystallization softening mechanism, while alloys with 3 wt.% Zn elements tend to undergo a dynamic reversion softening mechanism.

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“…There have been many reports of high performance Mg-Zn-Ce alloys processed by hot extrusion [13,14] and rolling [15][16][17]. It is found that the Ce/Zn ratio is a crucial factor of mechanical properties of wrought Mg alloy, which have significantly effects on deformation parameters [18], recrystallization behavior [19] and density of precipitates [20]. At present, some high strength Mg-Zn-Ce alloys were developed based on the Mg-(4-7)Zn alloys [13][14][15][16][17]21], however, the detailed microstructure, phase constitution and thermal-stability determined by Ce/Zn ratio were not clarified.…”

Section: Introductionmentioning

confidence: 99%

Effects of Ce on Microstructure of As-Cast Mg-6Zn Alloy

Yang

Cui

et al. 2022

MSF

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Phase constitution and phase transition temperature are important factors to influence deformation parameters, recrystallization behavior and density of precipitates of wrought Mg-Zn-Ce alloys. In this work the microstructures and phase constitution of as-cast Mg-6Zn-xCe (x = 0.6, 1, 2) alloys were characterized by XRD, SEM, TEM and DTA. The results show that the major compounds in Mg-6Zn-0.6Ce are blocky Mg4Zn7 phase, laminar Mg7Zn3 phase and cellular T phase. All compounds are almost blocky and cellular T phase in Mg-6Zn-1Ce alloy, and all T phase transformed to block in Mg-6Zn-2Ce alloy. The onset temperatures of phase transformation of T phase are increased with increasing Ce contents due to the decrease of solid solubility of Zn in T phase. The corresponding endothermic peaks of T phase in Mg-6Zn-0.6Ce, Mg-6Zn-1Ce and Mg-6Zn-2Ce are 358 °C, 494 °C and 514 °C, respectively. The increase of content of Ce result in the decrease of the concentrations of Zn in matrix, which leads to the decrease of β1′ precipitate density and the increase of onset temperatures of melting of matrix.

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Enhancing the Strength and Ductility in Mg–Zn–Ce Alloy through Achieving High Density Precipitates and Texture Weakening

Cited by 7 publications

References 54 publications

Thermodynamic Modeling and Mechanical Properties of Mg-Zn-{Y, Ce} Alloys: Review

Thermodynamic Modeling and Mechanical Properties of Mg-Zn-{Y, Ce} Alloys: Review

The Effect of (Mg, Zn)12Ce Phase Content on the Microstructure and the Mechanical Properties of Mg–Zn–Ce–Zr Alloy

Effects of Ce on Microstructure of As-Cast Mg-6Zn Alloy

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