Abstract For a given tribo system one of the methods to evaluate wear mechanism is to study the evolution of the wear debris. Environmental conditions alter the wear mechanism. In the present study, Ti–6Al–4V pins of 6.6 mm diameter were slid against a SS316L disc under ambient and vacuum conditions. Morphology of worn surfaces and wear debris were analyzed by Scanning Electron Microscopy (SEM), Energy Dispersive Spectroscopy (EDS) and X-Ray Diffraction (XRD). At high (137.3 N) load, plate like debris were observed at low speeds under both ambient and vacuum conditions where Adiabatic Shear Band (ASB) was dominate mechanism. And an ambient condition of higher speeds produced fine wear particles where tribo oxidation (TO) and mechanically mixed layers (MML) were dominant mechanism and at vacuum condition of same speeds produced large lump wear debris due to the cause of high plastic deformation and phase transition from HCP to BCC. The analysis of the debris clearly indicates the synergism influence of three mechanisms (ASB, TO and MML) playing a role.

中文翻译：

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Ti-6Al-4V与SS316L在环境和真空条件下干滑动过程中磨屑形态的演变

摘要 对于给定的摩擦系统，评价磨损机制的方法之一是研究磨屑的演化。环境条件会改变磨损机制。在本研究中，在环境和真空条件下，直径为 6.6 毫米的 Ti-6Al-4V 销在 SS316L 盘上滑动。通过扫描电子显微镜 (SEM)、能量色散谱 (EDS) 和 X 射线衍射 (XRD) 分析磨损表面和磨屑的形态。在高 (137.3 N) 负载下，在绝热剪切带 (ASB) 占主导地位的环境和真空条件下，在低速下观察到板状碎片。并且在更高速度的环境条件下产生细小的磨损颗粒，其中摩擦氧化 (TO) 和机械混合层 (MML) 是主要机制，并且在相同速度的真空条件下由于高塑性变形和相变的原因产生大块磨损碎片从 HCP 到 BCC。对碎片的分析清楚地表明了三种机制（ASB、TO 和 MML）的协同作用。