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首页> 外文期刊>Journal of Materials Engineering and Performance >Effects of Heat Treatment on Microstructure, Mechanical Properties, Corrosion Resistance and Cytotoxicity of ZM21 Magnesium Alloy as Biomaterials
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Effects of Heat Treatment on Microstructure, Mechanical Properties, Corrosion Resistance and Cytotoxicity of ZM21 Magnesium Alloy as Biomaterials

机译：热处理对ZM21镁合金作为生物材料的微观结构，力学性能，耐腐蚀性和细胞毒性的影响

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摘要

The effects of heat treatment on microstructure, mechanical properties, corrosion resistance and cytotoxicity of extruded Mg-2Zn-1Mn (wt.%) alloy were investigated for biomedical application in this study. The extruded alloy was T4 treated at 510 degrees C for 4h and T5 treated at 200 degrees C for 16h separately. The extruded Mg-Zn-Mn alloy mainly consists of MgxMny phases. After T4 treatment, the amount of MgxMny phases decreases and average grain size rises from 8 to 24m. After T5 treatment, Mg7Zn3 phase newly precipitates along the grain boundaries and the size of grain remains similar. Compared with the T4-treated samples, the extruded and T5-treated samples exhibit higher mechanical properties. The T5-treated samples have an ultimate tensile stress of 273MPa and an elongation of 19.7%. On the other hand, T4-treated samples present higher corrosion resistance in electrochemical tests. The degradation rates of extruded, T4-treated and T5-treated samples are 0.44mm/year, 0.48mm/year and 0.50mm/year, respectively, in Ringer's solution at 37 +/- 0.2 degrees C. In addition, T4-treated alloy does not induce toxicity to the L-929 cells in in vitro cytotoxicity test.
机译：研究了本研究的生物医学应用研究了对挤出Mg-2Zn-1Mn（重量％）合金的微观结构，机械性能，耐腐蚀性和细胞毒性的影响。将挤出合金在510℃处理4小时，T5分别处理16小时。挤出的Mg-Zn-Mn合金主要由MGXMNY相位组成。在T4处理后，MgXMny相的量降低，平均粒度从8到24米上升。在T5处理后，Mg7zN3相沿着晶界新沉淀，谷物的尺寸保持相似。与T4处理的样品相比，挤出和T5处理的样品具有更高的机械性能。 T5处理的样品具有273MPa的最终拉伸应力，伸长率为19.7％。另一方面，T4处理的样品在电化学测试中具有更高的耐腐蚀性。挤出，T4处理和T5处理样品的降解率分别为0.44mm /米/米，0.48mm /米/米/年，分别在林格氏溶液中，在37 +/- 0.2℃下，T4处理合金不会诱导体外细胞毒性试验中L-929细胞的毒性。

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