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Preparation, Microstructure and Properties of Medical Mg-Zn-Y-Nd Alloy Micro-tubes
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[1]Li Weiqing,Zhu Shijie,Sun Yufeng,et al.Preparation, Microstructure and Properties of Medical Mg-Zn-Y-Nd Alloy Micro-tubes[J].Journal of Zhengzhou University (Engineering Science),2021,42(02):94-98.[doi:10.13705/j.issn.1671-6833.2021.02.005]
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Journal of Zhengzhou University (Engineering Science)[ISSN 1671-6833/CN 41-1339/T] Volume: 42卷 Number of periods: 2021 02 Page number: 94-98 Column: Public date: 2021-04-12
Title:
Preparation, Microstructure and Properties of Medical Mg-Zn-Y-Nd Alloy Micro-tubes
Author(s):
Li Weiqing; Zhu Shijie; Sun Yufeng; Guan Shaokang;
School of Materials Science and Engineering, Zhengzhou University;
Keywords:
Mg-Zn-Y-Nd alloy;  micro-tube;  hot extrusion;  microstructure;  surface roughness
CLC:
-
DOI:
10.13705/j.issn.1671-6833.2021.02.005
Abstract:
In this study, Mg-Zn-Y-Nd alloy micro-tubes with an outer diameter of Φ2.46 mm and a wall thickness of 0.14 mm were successfully prepared by secondary hot extrusion, cold drawing and annealing. The outer diameter error, inner diameter error and wall thickness error of the micro-tubes were 0.51 %, 0.32 % and 3. 35 %, respectively. The yield strength, tensile strength and elongation of the drawn micro-tubes were 342.2±10 MPa, 350.4±10 MPa and 0.4±0.2 %. After annealing, the micro-tubes undergo static recrystallization, which resulted in grain refinement, texture weaken and dispersion of the second phase particles. The mechanical properties of the annealed micro-tubes were significantly improved. The yield strength, tensile strength and elongation of the annealed micro-tubes were 245.6±10 MPa, 305.6±10 MPa and 18.2±1.0 %, respectively. Moreover, the fractures of the annealed micro-tubes exhibited typical ductile fracture characteristics.
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