This study focused on the tribological performance and microstructure evolution of T20Z alloy after dry sliding in air and vacuum. After the tribological tests, normal load and sliding velocity were considered to be optimized based on specific wear rates using Taguchi technique. The results of S/N ratio showed that the optimization of the parameters was 10 N, 0.59 m s −1 for obtaining the minimum wear rates in both air and vacuum. Also, the worn surface and cross-section of T20Z alloy as well as wear debris and counterpart steel balls were analyzed by scanning electron microscopy. Raman spectrometer was performed to further analyze the worn surface. The topography of wear scar was observed using a three-dimensional optical profilometer. The microstructure evolution of T20Z alloy was analyzed by transmission electron microscopy. The results showed that the wear mechanisms in air varied from abrasive wear to delamination wear and severe abrasive wear, and the grain size ...

中文翻译：

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不同大气条件下T20Z合金的摩擦学性能和干滑诱导组织演变

这项研究的重点是在空气和真空中干滑后，T20Z合金的摩擦学性能和组织演变。经过摩擦学测试，使用Taguchi技术，根据特定的磨损率，认为正常载荷和滑动速度已得到优化。信噪比的结果表明，为了获得在空气和真空中的最小磨损率，参数的优化为10 N，0.59 ms -1。另外，通过扫描电子显微镜分析了T20Z合金的磨损表面和横截面以及磨损碎片和对应的钢球。进行拉曼光谱仪以进一步分析磨损的表面。使用三维光学轮廓仪观察磨损痕的形貌。用透射电子显微镜分析了T20Z合金的组织演变。