학술논문
织构化钛合金减阻及耐腐蚀性能分析 / Analysis of Drag Reduction and Corrosion Resistance Behaviors of Textured Titanium Alloy
Document Type
Academic Journal
Author
Source
航空制造技术 / Aeronautical Manufacturing Technology. 66(20):14-19
Subject
Language
Chinese
ISSN
1671-833X
Abstract
寻找适合于航行体表面的新型防污减阻手段长期以来都是航行体研究领域的热点.钛合金具有密度小、比强度高、耐高温、耐腐蚀等优良特性,被广泛用于航行体外壳、桨叶等结构.在钛合金实现表面微织构减阻具有广泛的应用前景和重要的研究意义.本研究在TC4钛合金表面制造出具有连续结构的表面微织构,通过光镜观察、激光光聚焦观察等方式对其表面形貌进行表征,并采用悬挂位移式阻力测试法和电化学腐蚀磨损试验分析表面织构在一定流速下的减阻效果及耐腐蚀性能.试验结果表明,与光滑表面相比,具有一定连续性结构的非光滑表面能够减小流体的表面摩擦阻力;合理的表面微织构能显著减小钛合金材料表面摩擦系数,降低摩擦阻力,同时降低摩擦腐蚀电位,提高航行体结构在海洋环境下的耐腐蚀能力与工作寿命.
It has been a hot topic in the field of vehicle research to find a new anti-pollution and anti-drag means used for vehicle surface.In recent years,the traditional organic tin antifouling coatings are being eliminated.Titanium alloy has the advantages of low density,high strength,heat resistance and corrosion resistance,etc.,and is widely used in the structure of vehicle shell and blade.Therefore,the realization of surface microtexture drag reduction on titanium alloy has a wide application prospect and important research significance.In this paper,the surface microtexture was obtained on the surface of TC4 titanium alloy by nano laser machine.The structure was characterized by optical microscopy and laser focusing observation.The experimental results show that the non-smooth surface with continuous structure can reduce the frictional resistance of fluid compared with smooth surface.In order to obtain the electrochemical parameters of surface texture under seawater condition,the corrosion and wear experiments of TC4 titanium alloy disk marked with surface microtexture were carried out by electrochemical friction testing machine.The results show that suitable surface microtexture can significantly reduce the friction coefficient,friction resistance and wear corrosion potential of titanium alloy materials,and improve the corrosion resistance and working life of the vehicle structure in the marine environment.
It has been a hot topic in the field of vehicle research to find a new anti-pollution and anti-drag means used for vehicle surface.In recent years,the traditional organic tin antifouling coatings are being eliminated.Titanium alloy has the advantages of low density,high strength,heat resistance and corrosion resistance,etc.,and is widely used in the structure of vehicle shell and blade.Therefore,the realization of surface microtexture drag reduction on titanium alloy has a wide application prospect and important research significance.In this paper,the surface microtexture was obtained on the surface of TC4 titanium alloy by nano laser machine.The structure was characterized by optical microscopy and laser focusing observation.The experimental results show that the non-smooth surface with continuous structure can reduce the frictional resistance of fluid compared with smooth surface.In order to obtain the electrochemical parameters of surface texture under seawater condition,the corrosion and wear experiments of TC4 titanium alloy disk marked with surface microtexture were carried out by electrochemical friction testing machine.The results show that suitable surface microtexture can significantly reduce the friction coefficient,friction resistance and wear corrosion potential of titanium alloy materials,and improve the corrosion resistance and working life of the vehicle structure in the marine environment.