The load-induced dry-sliding wear behavior of alpha titanium (Ti) with low amount of boron (< 1 wt%) samples made through plasma transferred arc solid free form fabrication process were studied in the untreated and hardened shot-peened surface conditions. Shot peening conducted at 90 psi for two minutes for 100% coverage with S-550 steel shots, was found to lead to an increase in surface hardness, with a depth of penetration of approximately 1 mm. While shot peening in this scheme was found to have a limited influence on COF and wear rates, it did influence the wear mechanisms observed. Untreated samples had a shift in wear behavior from low to high loading conditions. Dominating wear mechanisms at low loads (≤ 10 N) for untreated samples were oxidative and abrasive wear accompanied by weight gain of the steel counterface balls. At higher loads (> 10 N), untreated samples experienced weight loss of the steel counterface balls and severe plastic deformation with the formation and onset delamination of mechanically mixed layers (MML). Comparatively, shot-peened samples exhibited limited changes in wear behavior, remaining dominated by oxidation wear over the loading range. With oxidation wear dominating and the shot peening treatment inhibiting the formation of a MML and its delamination, it is hypothesized that the transition to severe wear may be delayed to higher loads from this treatment.

在未经处理和硬化的喷丸表面条件下，研究了通过等离子体转移电弧固体自由形式制造工艺制成的具有少量硼 (< 1 wt%) 的 α 钛 (Ti) 的负载诱导干滑动磨损行为。发现在 90 psi 下用 S-550 钢丸 100% 覆盖两分钟的喷丸硬化导致表面硬度增加，穿透深度约为 1 毫米。虽然发现该方案中的喷丸处理对 COF 和磨损率的影响有限，但它确实影响了观察到的磨损机制。未经处理的样品磨损行为从低负载条件转变为高负载条件。未处理样品在低载荷 (≤ 10 N) 下的主要磨损机制是氧化磨损和磨料磨损，并伴随钢制配合球的重量增加。在更高的载荷 (> 10 N) 下，未经处理的样品经历了钢制反面球的重量损失和严重的塑性变形，机械混合层 (MML) 的形成和开始分层。相比之下，喷丸处理样品的磨损行为变化有限，在加载范围内仍以氧化磨损为主。由于氧化磨损占主导地位，喷丸处理抑制了 MML 的形成及其分层，据推测，从这种处理开始，向严重磨损的过渡可能会延迟到更高的负载。在负载范围内，其余主要是氧化磨损。由于氧化磨损占主导地位，喷丸处理抑制了 MML 的形成及其分层，据推测，从这种处理开始，向严重磨损的过渡可能会延迟到更高的负载。在负载范围内，其余主要是氧化磨损。由于氧化磨损占主导地位，喷丸处理抑制了 MML 的形成及其分层，据推测，从这种处理开始，向严重磨损的过渡可能会延迟到更高的负载。