|Biodegradable Mg-Zn-Y alloys with long-period stacking ordered structure: Optimization for mechanical properties|
|X. Zhao; L. L. Shi; J. Xu
|Source Publication||Journal of the Mechanical Behavior of Biomedical Materials
|Abstract||To optimize the mechanical properties for biodegradable orthopedic implant, microstructures and tensile properties of Mg-Zn-Y alloys containing long period stacking ordered (LPSO) phase were investigated. For the as-cast Mg100-3x(Zn1Y2)(x) (1 <= x <= 3)alloys, volume fraction of 18R LPSO phase increases with increasing the contents of Zn and Y. Mg97Zn1Y2 alloy exhibits the optimal combination of strength and plasticity. Substitution of bioactive element Ca for Y in the Mg97Zn1Y2 does not favor the formation of LPSO phase, but involving the formation of Mg2Ca phase. By micro-alloying with Zr as grain refinement agent, morphology of alpha-Mg in the Mg96.83Zn1Y2Zr0.17 alloy is changed into the equiaxial shape, together with a significant refinement in grain size to 30 mu m. It brings about an improvement not only in strength but also in plasticity, in contrast to the Zr-free alloy. In comparison with the as-cast state, warmextruded alloys manifest significantly improved properties not only in strength but also in plasticity due to the refinement of alpha-Mg grain by dynamic recrystallization and the alignment of LPSO phase along extrusion direction. (C) 2012 Elsevier Ltd. All rights reserved.|
; shi, ling-ling
; xu, jian] chinese acad sci, inst met res, shenyang natl lab mat sci, shenyang 110016, peoples r china.
; xu, j (reprint author), chinese acad sci, inst met res, shenyang natl lab mat sci, 72 wenhua rd, shenyang 110016, peoples r china.
Period Stacking Order
Solidified Mg97zn1y2 Alloy
X. Zhao,L. L. Shi,J. Xu. Biodegradable Mg-Zn-Y alloys with long-period stacking ordered structure: Optimization for mechanical properties[J]. Journal of the Mechanical Behavior of Biomedical Materials,2013,18:181-190.
X. Zhao,L. L. Shi,&J. Xu.(2013).Biodegradable Mg-Zn-Y alloys with long-period stacking ordered structure: Optimization for mechanical properties.Journal of the Mechanical Behavior of Biomedical Materials,18,181-190.
X. Zhao,et al."Biodegradable Mg-Zn-Y alloys with long-period stacking ordered structure: Optimization for mechanical properties".Journal of the Mechanical Behavior of Biomedical Materials 18(2013):181-190.
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