A high-strength and high-ductility Zn–Ag alloy achieved through trace Mg addition and ECAP

Zhuo, Xiaoru; Zhao, Liyan; Liu, Huan; Qiao, Yanxin; Jiang, Jinghua; Ma, Aibin

doi:10.1016/j.msea.2023.145381

Cited by 16 publications

(1 citation statement)

References 56 publications

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“…An additional reason for the increase in ductility is probably the textural changes that occurred after ECAP. Zhuo et al previously showed that ECAP can increase the strength and ductility of the Zn-2.5Ag-0.08Mg alloy up to 393.1 MPa and 56.3%, respectively [ 38 ]. This combination of strength and ductility is due to strong grain refinement, suppression of deformation twinning and activation of <c + a> pyramidal sliding.…”

Section: Discussionmentioning

confidence: 99%

Bioactivity Features of a Zn-1%Mg-0.1%Dy Alloy Strengthened by Equal-Channel Angular Pressing

Martynenko,

Anisimova,

Shinkareva

et al. 2023

Biomimetics

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The structure, phase composition, corrosion and mechanical properties, as well as aspects of biocompatibility in vitro and in vivo, of a Zn-1%Mg-0.1%Dy alloy after equal-channel angular pressing (ECAP) were studied. The structure refinement after ECAP leads to the formation of elongated α-Zn grains with a width of ~10 µm and of Mg- and Dy-containing phases. In addition, X-ray diffraction analysis demonstrated that ECAP resulted in the formation of the basal texture in the alloy. These changes in the microstructure and texture lead to an increase in ultimate tensile strength up to 262 ± 7 MPa and ductility up to 5.7 ± 0.2%. ECAP slows down the degradation process, apparently due to the formation of a more homogeneous microstructure. It was found that the alloy degradation rate in vivo after subcutaneous implantation in mice is significantly lower than in vitro ones. ECAP does not impair biocompatibility in vitro and in vivo of the Zn-1%Mg-0.1%Dy alloy. No signs of suppuration, allergic reactions, the formation of visible seals or skin ulcerations were observed after implantation of the alloy. This may indicate the absence of an acute reaction of the animal body to the Zn-1%Mg-0.1%Dy alloy in both states.

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Section: Discussionmentioning

confidence: 99%