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首页> 外文期刊>International Journal of Surface Science and Engineering >Ultrasonically nanostructured electric-spark deposited Ti surface layer on Ti6Al4V alloy: enhanced hardness and corrosion resistance
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Ultrasonically nanostructured electric-spark deposited Ti surface layer on Ti6Al4V alloy: enhanced hardness and corrosion resistance

机译：Ti6Al4V合金上的超声纳米结构电火花沉积Ti表面层：硬度和耐腐蚀性增强

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摘要

A complex approach for the production of corrosion resistant nanostructured surface layer on the Ti6Al4V alloy is reported in this article. Surface modification was conducted using sequential application of electric discharge surface alloying (EDSA) with alpha-titanium and ultrasonic impact treatment (UIT) induced the nanostructuring of the EDSA-formed Ti-layer. X-ray diffraction and TEM analysis show that the applied modifications form the outmost surface layer of 20 mu m thick comprised the nanoscale grain structure with a grain size of 10-30 nm. Additionally, the UIT-induced mechanochemical oxidation of the modified surface was observed by SEM with energy dispersive X-ray microanalysis. The produced nanostructured alpha-titanium surface layer shows enhanced microhardness and better corrosion behaviour in saline solution than those of the original and UIT-processed Ti6Al4V alloys. Thus, the complex treatment applied can be recommended for the surface finishing of the products made of multi-phase titanium alloys, such as biomedical implants.
机译：在本文中报道了一种在Ti6Al4V合金上生产耐腐蚀纳米结构表面层的复杂方法。使用α-钛和超声波冲击处理（UIT）的电放电表面合金（EDSA）的顺序施加表面改性，诱导EDSA形成的Ti层的纳米结构。 X射线衍射和TEM分析表明，施加的修改形成20μm厚的最外表面层，包括颗粒尺寸为10-30nm的纳米级晶粒结构。另外，通过SEM与能量分散X射线微基分析观察改性表面的UIT诱导的改性表面的机械化学氧化。所生产的纳米结构α-钛表面层显示出增强的显微硬度和盐水溶液中的更好的腐蚀行为而不是原始和UIT加工的Ti6Al4V合金。因此，可以推荐应用的复杂处理，用于由多相钛合金制成的产品的表面精加工，例如生物医学植入物。

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