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首页> 外文期刊>Mechanics & Industry >Some aspects regarding the influence of the anisotropy of an AA2021-T351 rolled thick plate on its tribological behaviour
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Some aspects regarding the influence of the anisotropy of an AA2021-T351 rolled thick plate on its tribological behaviour

机译：关于AA2021-T351各向异性轧制厚板对其摩擦学行为的影响的一些方面

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摘要

This scientific paper aims to study the influence of the anisotropy of an aluminium AA2024-T251 rolled thick plate on the surface tribological properties based on previous experimental and numerical studies concerning bulk and surface mechanical behaviour. Experimental friction tests have been made on the aluminium alloy thick plate surface using sliding of an ultra-high-molecular-weight polyethylene (UHMWPE) cylindrical pin. The used tribological test involves the generation of local motion along specified trajectories with different orientations under the action of a constant normal force and a constant slip velocity. Three different normal forces (3N, 5N, 7N) have been applied using five different sliding speeds (0.005, 0.05, 0.5, 1 and 5mm/s) along a linear trajectory of 3?mm length. In order to analyze the influence of the aluminium alloy anisotropy, the tests have been performed along three directions: a longitudinal one, corresponding to the rolling direction of the sample (0°), a transverse one, perpendicular to the rolling direction (90°), and a median direction (45°). Taking into account the observed bulk and surface anisotropy, especially concerning a fractal nature of the surface topography, an investigation was performed in order to determine its influence on the anisotropic tribological properties. In this purpose, fractal friction characteristics have been determined for the sliding process using a constant normal force F _( n ?)=?7 N and the above five sliding speeds.
机译：这种科学论文旨在基于先前的实验和数值研究，研究AA2024-T251轧制轧制轧制厚板的各向异性的影响，基于先前的散装和表面力学行为的实验性和数值研究。使用超高分子量聚乙烯（UHMWPE）圆柱销的滑动，在铝合金厚板表面上制备了实验摩擦试验。二手摩擦学检测涉及沿着具有不同取向的指定轨迹产生局部运动，并在恒定的正常力和恒定滑移速度的作用下。使用3×mm长度的线性轨迹（0.005,0.05,0.5,1和5mm / s）施加三种不同的正常力（3n，5n，7n）。为了分析铝合金各向异性的影响，已经沿三个方向进行了测试：对应于样品的滚动方向（0°）的纵向，垂直于滚动方向的横向（90°）（90° ）和中位方向（45°）。考虑到观察到的散装和表面各向异性，特别是关于表面形貌的分形性质，进行研究以确定其对各向异性摩擦学特性的影响。从而以为此目的，已经使用恒定的正常力F _（n→）=Δ7n和上述五个滑动速度来确定用于滑动过程的分形摩擦特性。

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