This study aims to investigate and present the tribological behaviour of recursively friction stir processed 7075 aluminium alloy.,In this work, aluminium 7075 alloy is friction stir processed recursively by varying the tool rotational speed, traverse speed and the number of passes. Wear pins for testing were extracted from the processed zone and the surfaces were prepared. Wear tests were conducted as per the standard on a pin-on-disc wear testing machine at constant testing conditions and the corresponding tribological properties were analysed. The worn surface and the debris were analysed using a field-emission scanning electron microscope with energy dispersive spectroscopy analysis and elemental mapping to identify the mode of wear mechanism.,The experimental results indicate that the specimen fabricated at 1,150 rpm of tool rotation speed and 60 mm/min of traverse speed with 4 passes had the highest wear resistance and the minimum friction coefficient.,This paper details the effect of recursive friction stir processing on the surface of AA 7075 to improve the tribological properties.,The peer review history for this article is available at: https://publons.com/publon/10.1108/ILT-02-2020-0070/

中文翻译：

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AA7075递归搅拌摩擦加工的摩擦学行为

本研究旨在研究和呈现递归搅拌摩擦加工的 7075 铝合金的摩擦学行为。在这项工作中，通过改变刀具转速、横移速度和道次次数，对 7075 铝合金进行递归摩擦搅拌加工。从加工区取出用于测试的耐磨销并制备表面。磨损试验是在销-盘式磨损试验机上按照标准在恒定试验条件下进行的，并分析了相应的摩擦学性能。使用场发射扫描电子显微镜对磨损表面和碎屑进行分析，结合能量色散光谱分析和元素映射来确定磨损机制。实验结果表明，试样在 1,