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Surface modification and characterisation of Ti-Al-V alloys

机译：Ti-Al-V合金的表面改性和表征

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摘要

Ti-10V-3Al-2Fe and Ti-6Al-4V alloys used in aircraft industries were nitrided using a conventional d.c. plasma technique. The effect of nitriding time, temperature and atmosphere were investigated in detail. X-ray diffraction analysis confirm the formation of TiN and Ti_2N phases on the nitrided specimens. Load-dependent microhardness measurements combined with microsturctural analysis revealed the unique features of the case-hardened materials. The microhardness after the nitriding treatment was found to be 17.64 GPa (50 g). From the case of depth profile and microstructure (optical microscopy) the thickness of the nitrided layer was estimated to be 20-50 μm. The corrosion rate of the alloys investigated using potentiostatic polarisation method in sulphide environment was found to be lower than in chloride environment.
机译：飞机工业中使用的Ti-10V-3Al-2Fe和Ti-6Al-4V合金是使用常规dc氮化的。等离子技术。详细研究了氮化时间，温度和气氛的影响。 X射线衍射分析证实在氮化试样上形成TiN和Ti_2N相。载荷相关的显微硬度测量与显微结构分析相结合，揭示了表面硬化材料的独特功能。发现氮化处理后的显微硬度为17.64GPa（50g）。从深度分布和微观结构（光学显微镜）的情况，氮化层的厚度估计为20-50μm。发现在硫化物环境中使用恒电位极化法研究的合金的腐蚀速率低于氯化物环境。

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