Effect of preprocessing heat treatment of the Al-16Si-4Cu alloy on microstructure and tribological behavior of friction-surfaced coating

IF 7.5 Q1 CHEMISTRY, PHYSICAL Applied Surface Science Advances Pub Date : 2023-12-30 DOI:10.1016/j.apsadv.2023.100564

Seyedeh Marjan Bararpour , Hamed Jamshidi Aval , Roohollah Jamaati , Mousa Javidani

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Abstract

This study investigated the simultaneous effect of the consumable rod's preprocessing heat treatment conditions (homogenization, solid solution, and artificial aging treatment) and severe plastic deformation on the properties of Al-Si-Cu alloy friction surfaced on a commercially pure aluminum alloy substrate. The friction-surfaced coating's microstructural evolution, mechanical properties, and wear resistance were evaluated. The results showed that coatings fabricated using artificially aging (T6)-treated consumable rods resulted in the highest coating width (17.02±0.83 mm) and maximum efficiency (39.78 ± 1.23 %). Friction surfacing using artificially aged and solid solution-treated consumable rods results in minimum (2.78 ± 0.28 µm) and maximum (6.32±0.34 µm) coating grain sizes, respectively. Friction surfacing using T6-treated consumable rods results in smaller, more uniformly distributed Si particles in the coating microstructure. Compared to the other consumable rods, the coatings fabricated using T6-treated consumable rods result in the highest hardness (110.54±10.29 HV0.1), maximum bond strength (14.15±0.75 kN), and lowest wear rate (0.20±0.03 µg/Nm).

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Al-16Si-4Cu 合金的预加工热处理对摩擦表面涂层的微观结构和摩擦学行为的影响

本研究探讨了易损件棒材的预加工热处理条件（均质化、固溶和人工时效处理）和严重塑性变形对在商业纯铝合金基体上摩擦堆焊的铝硅铜合金性能的同时影响。对摩擦表面涂层的微观结构演变、机械性能和耐磨性进行了评估。结果表明，使用人工老化（T6）处理的耗材棒制造的涂层具有最高的涂层宽度（17.02±0.83 毫米）和最大的效率（39.78±1.23 %）。使用人工老化和固溶处理的易耗棒进行摩擦堆焊，涂层晶粒尺寸分别最小（2.78±0.28 µm）和最大（6.32±0.34 µm）。使用经 T6 处理的易耗棒进行摩擦堆焊，涂层微观结构中的硅颗粒更小、分布更均匀。与其他易耗棒相比，使用 T6 处理易耗棒制作的涂层硬度最高（110.54±10.29 HV0.1），结合强度最大（14.15±0.75 kN），磨损率最低（0.20±0.03 µg/Nm）。

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