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首页> 外文期刊>Journal of Materials Engineering and Performance >Studies on Bio-acceptability of Thermo-Mechanically Processed Mg-4Li-0.5Ca Alloy and Its Microstructural Correlation
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Studies on Bio-acceptability of Thermo-Mechanically Processed Mg-4Li-0.5Ca Alloy and Its Microstructural Correlation

机译：热机械加工Mg-4LI-0.5CA合金生物可接受性及其微观结构相关性研究及其微观结构相关性

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In this study, in vitro corrosion behavior of rolled Mg-4Li-0.5Ca (wt.%) alloy at three temperatures (250, 300 and 350 degrees C) with 75% reduction and subsequent short annealing at 200 degrees C for 10min was systematically investigated. Microstructural evaluation, Mg2Ca precipitation and defects like twins were characterized by an optical microscope, scanning electron microscope and x-ray diffraction. Micrographs reveal an increase in grain size and comparatively reduction in twins density population with an increase in hot rolling temperature and subsequent short annealing. In vitro corrosion tests like dynamic bio-corrosion immersion test, hydrogen evolution test and electrochemical linear polarization test were carried out in simulated body fluid. From in vitro corrosion tests, it is observed that the alloy rolled at 350 degrees C and subsequently short-annealed shows better bio-corrosion resistance than other hot-rolled and short-annealed alloys. This is due to low twins density and uniformly dispersed Mg2Ca compound throughout the matrix.
机译：在该研究中，系统地，在有系统地，系统地相下调查。通过光学显微镜，扫描电子显微镜和X射线衍射表征微结构评价，Mg2Ca沉淀和缺陷。显微照片揭示了晶粒尺寸的增加，并在孪生密度群体中的增加，随后的热轧温度和随后的短退火。在模拟体液中进行了动态生物腐蚀浸渍试验，氢进化试验和电化学线性偏振试验等体外腐蚀试验。从体外腐蚀测试中，观察到在350℃下轧制的合金，随后短退火显示出比其他热轧和短退火的合金更好的生物耐腐蚀性。这是由于孪胞胎密度低，并且在整个基质中均匀分散Mg2Ca化合物。

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