[1]李伟庆,朱世杰,孙玉峰,等.医用Mg-Zn-Y-Nd合金微细管材的制备及组织性能研究[J].郑州大学学报(工学版),2021,42(2):94-98.[doi:10.13705/j.issn.1671-6833.2021.02.005]
　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(2):94-98.[doi:10.13705/j.issn.1671-6833.2021.02.005]
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医用Mg-Zn-Y-Nd合金微细管材的制备及组织性能研究()
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《郑州大学学报(工学版)》[ISSN:1671-6833/CN:41-1339/T]

卷:
42
期数:
2021年2期
页码:
94-98
栏目:
出版日期:
2021-04-12

文章信息/Info

Title:
Preparation, Microstructure and Properties of Medical Mg-Zn-Y-Nd Alloy Micro-tubes
作者:
李伟庆,朱世杰,孙玉峰,关绍康
郑州大学 材料科学与工程学院，河南 郑州 450001
Author(s):
School of Materials Science and Engineering, Zhengzhou University, Zhengzhou 450001, China
关键词:
Keywords:
Mg-Zn-Y-Nd alloy;  micro-tube;  hot extrusion;  microstructure;  surface roughness
DOI:
10.13705/j.issn.1671-6833.2021.02.005
文献标志码:
A
摘要:

通过二次热挤压 、 冷拉拔以及退火等方法制备外径 2.46mm 、 壁厚 0.14mm 的 Mg-Zn-Y-Nd 合金微细管材 。 采用 OM 、 SEM 、 EBSD 以及拉伸试验对微细管材的显微组织 、 尺寸误差 、 表面粗糙度以及力学性能进行分析 。 结果表明 ： 微细管材的外径误差 、 内径误差以及壁厚误差分别为 0.51% 、 0.32% 、 3.35% 。 冷拉拔微细管材的屈服强度为 342MPa ， 抗拉强度为 350MPa ， 延伸率为 0.5% 。 经退火处理后 ， 微细管材发生静态再结晶!造成晶粒细化 、 织构弱化以及第二相颗粒的弥散分布 ， 其综合力学性能得到显著改善 。 退火态微细管材的断口表现出典型的韧性断裂特征 ， 其屈服强度 、 抗拉强度以及延伸率分别为 246MPa 、 306MPa 、 18.0% 。


Abstract:
In this study, Mg-Zn-Y-Nd alloy micro-tubes with an outer diameter of 2.46 mm and a wall thickness of 0.14 mm were prepared by secondary hot extrusion, cold drawing and annealing. The microstructure, dimension error, surface roughness and mechanical properties of the micro-tubes were analyzed by OM, SEM, EBSD and tensile test. The results showed that: 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 342MPa, 350MPa and 0.5%. After annealing, the micro-tubes under went static recrystallization, which resulted in grain refinement, texture weaken and dispersion of the secondphase particles. The mechanical properties of the annealed micro-tubes were significantly improved. The fractures of the annealed micro-tubes exhibited typical ductile fracture characteristics, and its yield strength, tensile strength and elongation were 246MPa, 306MPa and 18.0%, respectively.

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更新日期/Last Update: 2021-05-30