Enhanced age-hardening response in Mg–Zn–Co alloys with Bi additions

He, Chao; Liu, C.Q.; Chen, H.W.; Nie, Jian Feng

doi:10.1016/j.jallcom.2019.152419

Cited by 12 publications

(3 citation statements)

References 33 publications

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“…Nanosized Mg 3 Bi 2 precipitates are usually formed during the age heat treatment of Mg-Bi alloys and they show rod-or plate-like shapes lying parallel to 〈1120〉 or 〈1010〉 directions of Mg matrix (Sasaki et al, 2009;Sun and Sun, 2018). Zn coworks with bismuth (Bi) in Mg to further refine the Mg 3 Bi 2 precipitates by around two-to fivefold while promoting the nucleation of Mg 3 Bi 2 (Sasaki et al, 2009;He et al, 2020). Nanosized Mg 3 Bi 2 particles could be obtained during the postthermal processing and the area fraction is in a positive linear relationship with Bi addition (Yu et al, 2020).…”

Section: Introductionmentioning

confidence: 99%

“…Nanosized Mg 3 Bi 2 particles could be obtained during the postthermal processing and the area fraction is in a positive linear relationship with Bi addition (Yu et al, 2020). The binary or multicomponent Mg-Bi-based alloys containing very fine precipitations were reported to show an improved hardening response (Sasaki et al, 2009;He et al, 2020). On the other hand, the constituent Mg 3 Bi 2 phase formed during solidification cannot dissolve comprehensively in homogenization, due to its high incipient melting temperature .…”

Section: Introductionmentioning

confidence: 99%

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Influence of Coarse Mg3Bi2 Particles on Deformation Behaviors of Mg-Bi Alloys

Guo

Varma

et al. 2021

Front. Mater.

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Mg-Bi binary alloys with concentrations of 1, 3, 6, and 9 wt% Bi and ternary Mg-9Bi-2.5Zn alloy were prepared by casting and hot extrusion. The results show that alloying with Bi refined as-cast grains of Mg alloys and the refinement efficiency of Bi is in between Al and Zr. It was also found that a critical value for the area fraction of constituent Mg3Bi2 particles seems to appear, which influences the dynamic recrystallization mechanism during extrusion. This influence results in either uniform or heterogenetic distribution of grain size and different extrusion texture intensities. Furthermore, the addition of Zn affected both the grain size and the area fraction/size of Mg3Bi2. Mechanical results and microstructure/fractography observation suggest that Mg3Bi2 particles do not impact the tensile nor compression yielding stress but act as fracture sources.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Influence of Coarse Mg3Bi2 Particles on Deformation Behaviors of Mg-Bi Alloys

Guo

Varma

et al. 2021

Front. Mater.

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“…It is reported that adding the cost-effective element bismuth (Bi) to Mg-based alloys could improve the mechanical properties and resistance to corrosion simultaneously when Bi presents in the α-Mg matrix with solutionized state and/or nano-scaled Mg-Bi precipitates (Tok et al, 2015;Majhi and Mondal, 2019). Bi has positive effects as it is able to form a thermally stable Mg 3 Bi 2 phase in the Mg alloys and because of its non-toxicity (He et al, 2019;Meng et al, 2020). Further, it is essential to introduce Al as a type of alloying element in applications that require grain refinement, thicker film formation, and castability (Lv et al, 2020).…”

Section: Introductionmentioning

confidence: 99%

Microstructural Characteristics, Mechanical and Corrosion Properties of an Extruded Low-Alloyed Mg-Bi-Al-Zn Alloy

Cheng

Liu

et al. 2020

Front. Mater.

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An extruded low-alloyed Mg-Bi-Al-Zn alloy combining excellent tensile properties (YS = 201 MPa, EL = 29. 4%) with high corrosion resistance (P i = 0.14 mm/a) for biomedical application is successfully developed in this study. The extruded alloy is mainly composed of dynamic recrystallized (DRXed) grains (2.32 ± 0.12 µm) and strongly textured coarse non-DRXed grains, as well as certain nano-scaled Mg 3 Bi 2 precipitates (135.68 ± 27.86 nm). Note that most basal planes for non-DRXed grains are preferentially distributed parallel to the extrusion direction. The study explored the dependences of the properties and relevant mechanisms of the studied alloy on its microstructural characteristics in terms of grain size, grain orientation, and precipitates.

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