Effect of equal channel angular extrusion on wear and corrosion behavior of the orthopedic Ti–13Nb–13Zr alloy in simulated body fluid
Effect of equal channel angular extrusion on wear and corrosion behavior of the orthopedic Ti–13Nb–13Zr alloy in simulated body fluid
复制标题
DOI：
10.1016/j.msec.2012.01.022
复制
发表时间：
2012-05
期刊：
影响因子：
--
通讯作者：
K. Suresh;M. Geetha;C. Richard;J. Landoulsi;H. Ramasawmy;S. Suwas;R. Asokamani
中科院分区：
文献类型：
--
作者：
K. Suresh;M. Geetha;C. Richard;J. Landoulsi;H. Ramasawmy;S. Suwas;R. Asokamani
研究了等通道转角挤压（ECAE）技术制备的超细晶Ti-13 Nb-Zr合金的织构、腐蚀和磨损行为。采用X射线衍射、扫描电镜和电子背散射衍射等手段对样品的微观结构进行了表征。我们专注于耐腐蚀性和微动行为，主要考虑这样的生物材料，在模拟体液。为此，进行了动电位极化测试以评估UFG合金在37°C的Hanks溶液中的腐蚀行为。在相同条件下对轴承钢进行微动磨损试验。还测量了样品的粗糙度，以检查形貌对样品的磨损行为的影响。我们的研究结果表明，ECAE过程显着提高合金作为骨科植入物的性能。尽管在微动磨损行为上没有观察到显著差异，但发现UFG合金的耐腐蚀性高于未经处理的材料。
We report investigations on the texture, corrosion and wear behavior of ultra-fine grained (UFG) Ti–13Nb–Zr alloy, processed by equal channel angular extrusion (ECAE) technique, for biomedical applications. The microstructure obtained was characterized by X-ray line profile analysis, scanning electron microscope (SEM) and electron back scattered diffraction (EBSD). We focus on the corrosion resistance and the fretting behavior, the main considerations for such biomaterials, in simulated body fluid. To this end, potentiodynamic polarization tests were carried out to evaluate the corrosion behavior of the UFG alloy in Hanks solution at 37°C. The fretting wear behavior was carried out against bearing steel in the same conditions. The roughness of the samples was also measured to examine the effect of topography on the wear behavior of the samples. Our results showed that the ECAE process increases noticeably the performance of the alloy as orthopedic implant. Although no significant difference was observed in the fretting wear behavior, the corrosion resistance of the UFG alloy was found to be higher than the non-treated material.