Transactions of Nonferrous Metals Society of China The Chinese Journal of Nonferrous Metals

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中国有色金属学报

ZHONGGUO YOUSEJINSHU XUEBAO

第26卷    第3期    总第204期    2016年3月

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文章编号:1004-0609(2016)-03-0526-09
时效处理对挤压态Mg-Gd-Nd-Sr-Zn-Zr合金力学与腐蚀性能的影响
章晓波1, 2,殷俏1, 2,马青龙1, 2,巴志新1, 2,王章忠1, 2,王强3

(1. 南京工程学院材料工程学院,南京 211167;
2. 江苏省先进结构材料与应用技术重点实验室,南京 211167;
3. 江苏康尚医疗器械有限公司,丹阳 212300
)

摘 要: 为提高生物镁合金的力学和腐蚀性能,对挤压态Mg-3Gd-1Nd-0.3Sr-0.2Zn-0.4Zr镁合金进行不同温度的时效处理,研究时效温度对合金显微组织、室温力学性能和在模拟体液中腐蚀性能的影响。结果表明:合金的析出相呈针状且富含Zr元素。时效处理后合金的显微硬度和屈服强度均比挤压态的高,且随时效温度的升高先升高后降低,当时效温度为185 ℃时,合金的显微硬度和屈服强度最高。腐蚀速率随着时效温度的升高先降低后升高,时效温度为230 ℃时,其质量损失腐蚀速率为挤压态的52%±7%。

 

关键字: 时效处理;生物镁合金;力学性能;腐蚀性能

Effect of aging treatment on mechanical and corrosionproperties of as-extruded Mg-Gd-Nd-Sr-Zn-Zr alloy
ZHANG Xiao-bo1, 2, YIN Qiao1, 2, MA Qing-long1, 2, BA Zhi-xin1, 2, WANG Zhang-zhong1, 2, WANG Qiang3

1. School of Materials Science and Engineering, Nanjing Institute of Technology, Nanjing 211167, China;
2. Jiangsu Key Laboratory of Advanced Structural Materials and Application Technology, Nanjing 211167, China;
3. Jiangsu Konsung Equipment Co., Ltd, Danyang 212300, China

Abstract:In order to improve the mechanical and corrosion properties of biomagnesium alloy, the aging treatments at different temperatures were conducted on the as-extruded Mg-3Gd-1Nd-0.3Sr-0.2Zn-0.4Zr alloy. The effects of the aging temperature on microstructure, room-temperature mechanical properties and corrosion properties in simulated body fluid of the alloy were studied. The results show that the Zr-rich needle-like precipitate is observed. The microhardness and yield strength of the alloy after aging treatment are higher than those of the as-extruded alloy, and they first increase and then decline with increasing aging temperature. The highest microhardness and yield strength are obtained at the aging temperature of 185 ℃. The corrosion rate of the alloy first decreases and then increases with increasing aging temperature, and the lowest corrosion rate of the alloy is acquired aged at 230 ℃, which is only 52%±7% compared to that of the as-extruded alloy obtained by mass loss test.

 

Key words: aging treatment; biomagnesium alloy; mechanical property; corrosion property

ISSN 1004-0609
CN 43-1238/TG
CODEN: ZYJXFK

ISSN 1003-6326
CN 43-1239/TG
CODEN: TNMCEW

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