| 退火工艺对生物可降解JDBM镁合金丝材力学性能与降解行为的影响 |
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| 引用本文： | 田圆,苗宏卫,牛佳林,黄华,康斌,曾晖,丁文江,袁广银. 退火工艺对生物可降解JDBM镁合金丝材力学性能与降解行为的影响[J]. 中国有色金属学会会刊, 2021, 31(9): 2615-2625. DOI: 10.1016/S1003-6326(21)65680-7 |
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| 作者姓名： | 田圆 苗宏卫 牛佳林 黄华 康斌 曾晖 丁文江 袁广银 |
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| 摘 要： | Mg?Nd?Zn?Zr生物可降解镁合金(JDBM)作为一种生物医用材料得到了广泛的关注和研究.为了加工高质量的JDBM丝材,通过显微镜观察、拉伸试验和浸没试验研究退火对拉拔后JDBM线材力学性能和降解行为的影响.对于直径为3 mm的挤压态合金丝,室温拉拔加工最多可连续进行9道次而无需退火,累积拉伸变形为125％.对拉拔...
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| 关 键 词： | Mg-Nd-Zn-Zr合金 拉拔 退火 力学性能 腐蚀速率 |
| 收稿时间： | 2020-11-18 |
Effects of annealing on mechanical properties and degradation behavior of biodegradable JDBM magnesium alloy wires |
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| Affiliation: | 1. National Engineering Research Center of Light Alloy Net Forming and State Key Laboratory of Metal Matrix Composite, Shanghai Jiao Tong University, Shanghai 200240, China;2. National & Local Joint Engineering Research Center of Orthopedic Biomaterials, Department of Bone & Joint Surgery, Peking University Shenzhen Hospital, Shenzhen 518036, China |
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| Abstract: | Mg–Nd–Zn–Zr magnesium alloy (JDBM) has been studied widely as biodegradable medical material. To process high quality JDBM wires, effects of annealing on the mechanical properties and degradation behavior after drawing were studied by microscopic observations, tensile and immersion tests. The as-extruded wires with a diameter of 3 mm could be drawn up to 9 passes without annealing until 125% cumulative drawing deformation. Complete recrystallization occurred after annealing at 325 °C for 30 min, 350 °C for 5 min or 450 °C for 3 min, respectively. Room temperature tensile tests and simulated body fluid immersion tests showed that annealing at slightly elevated temperature for short time could obtain better properties due to the finer grain size and more dispersive distribution of precipitates. For this study, annealing at 350 °C for 5 min is the best parameters which can be utilized to further fabricate fine wires. |
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| Keywords: | Mg–Nd–Zn–Zr alloy drawing annealing mechanical properties corrosion rate |
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