论文部分内容阅读
通过Ti-6Al-4V合金750℃条件下的置氢实验,分析了置氢过程的动力学规律,利用光学金相显微镜和二次离子质谱仪研究了保温时间对氢分布的影响规律.结果显示,Ti-6Al-4V合金置氢动力学遵循二维扩散机制,满足Valensi方程g(α)=α+(1-α)ln(1-α),氢在试样径向方向的二维扩散是置氢反应的控制步骤.置氢保温时间大于60min时,氢压趋于稳定,氢在试样径向方向的二维扩散停止,试样中心的微观组织和氢离子强度与边缘的相一致,氢均匀分布于试样当中.
The kinetics of the hydrogen production process was analyzed by setting hydrogen at 750 ℃ for Ti-6Al-4V alloy, and the effect of holding time on the distribution of hydrogen was studied by optical microscope and secondary ion mass spectrometer. The hydrogen kinetics of Ti-6Al-4V alloy follow the two-dimensional diffusion mechanism and satisfy the Valensi equation g (α) = α + (1-α) ln (1-α) Is the control step of the hydrogen set reaction.Hydrogen holding time is greater than 60min, the hydrogen pressure tends to be stable, hydrogen diffusion in the radial direction of the sample two-dimensional stop, the center of the sample microstructure and hydrogen ion intensity consistent with the edge of the phase , Hydrogen evenly distributed in the sample.