论文标题
表面粗糙度对625中Ni-base Superaly的早期氧化行为的影响
Effect of Surface Roughness on Early Stage Oxidation Behavior of Ni-Base Superalloy IN 625
论文作者
论文摘要
在目前的工作中，描述了在625中Ni-base Superaly的高温暴露期间表面粗糙度对氧化行为的影响。使用标准接触率仪以及新方法（分形分析）描述了表面粗糙度。发现与抛光样品相比，不同的表面制备导致了粗糙度的差异，与抛光样品相比，地面样品的参数增加至少一个数量级。氧化试验是在水平管炉中进行的。暴露后分析包括发光排放光发射光谱法（GD OES）和扫描电子显微镜（SEM），这表明磨削会降低625中的氧化动力学。发现表面制备会影响氧化物尺度的组成和形态。也提出了解释氧化行为变化机制的假设。
In the present work the effect of surface roughness on oxidation behavior during the early stages of high temperature exposure of Ni-base superalloy IN 625 is described. The surface roughness was described using standard contact profilometer as well as novel method, fractal analysis. It was found that the different surface preparation resulted in a difference in roughness with a parameter increase of at least one order of magnitude for the ground sample as compared with the polished sample. The oxidation test was performed in a horizontal tube furnace. Post exposure analyses including glow discharge optical emission spectrometry (GD OES) and scanning electron microscopy (SEM), which revealed that grinding lowers the oxidation kinetics of IN 625. It was found that surface preparation influences the oxide scale composition and morphology. The hypothesis explaining the mechanism responsible for the changes in oxidation behavior is proposed as well.
