Abstract The influence of diamond-like carbon (DLC) coating positions—coated flat, coated cylinder, and self-mated coated surface tribopairs—on the fretting behaviors of Ti-6Al-4V were investigated using a fretting wear test rig with a cylinder-on-flat contact. The results indicated that, for tests without coating (Ti-6Al-4V–Ti-6Al-4V contact), the friction (Qmax/P) was high (0.8–1.2), wear volumes were large (0.08–0.1 mm3) under a large displacement amplitude of ±40 µm and small (close to 0) under a small displacement amplitude of ±20 µm, and the wear debris was composed of Ti-6Al-4V flakes and oxidized particles. For tests with the DLC coating, under low load conditions, the DLC coating was not removed or was only partially removed, Qmax/P was low (≤0.2), and the wear volumes were small. Under high load conditions, the coating was entirely removed, Qmax/P was high (0.6–0.8), and the wear volumes were similar to those in tests without coating. The wear debris was composed of DLC particles, Ti-6Al-4V flakes, and oxidized particles. The DLC coating was damaged more severely when deposited on a flat surface than when deposited on a cylindrical surface. The DLC coating was damaged more severely when sliding against a DLC-coated countersurface than when sliding against the Ti-6Al-4V alloy.

中文翻译：

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沉积位置对 DLC 涂层在 Ti-6AL-4V 上的微动行为的影响

摘要 类金刚石碳 (DLC) 涂层位置——涂层平面、涂层圆柱体和自配合涂层表面摩擦对——对 Ti-6Al-4V 微动磨损行为的影响使用带有圆柱体的微动磨损试验台进行了研究。平面接触。结果表明，对于无涂层的试验（Ti-6Al-4V-Ti-6Al-4V 接触），摩擦（Qmax/P）高（0.8-1.2），磨损量大（0.08-0.1 mm3）。 ±40 µm的大位移幅度和±20 µm的小位移幅度下的小（接近0），磨屑由Ti-6Al-4V薄片和氧化颗粒组成。对于DLC涂层的测试，在低负载条件下，DLC涂层未去除或仅部分去除，Qmax/P较低（≤0.2），磨损量较小。在高负载条件下，涂层被完全去除，Qmax/P 高 (0.6-0.8)，磨损量与没有涂层的测​​试相似。磨屑由 DLC 颗粒、Ti-6Al-4V 薄片和氧化颗粒组成。当沉积在平坦表面上时，DLC 涂层比沉积在圆柱形表面上时损坏得更严重。与在 Ti-6Al-4V 合金上滑动相比，DLC 涂层在与 DLC 涂层的反面滑动时受到的损坏更严重。