Purpose

The purpose of this study is to design and process the optimal V-shaped microstructure for 7075 aluminum alloy and reveal its wear resistance mechanism and performance.

Design/methodology/approach

The hydrodynamic pressure lubrication models of the nontextured, V-shaped, circular and square microtextures are established. The corresponding oil film pressure distributions are explored. The friction and wear experiments are conducted on a rotating device. The effects of the microstructure shapes and sizes on the wear mechanisms are investigated via the friction coefficients and surface morphologies.

Findings

In comparison, the V-shaped microtexture has the largest oil film carrying capacity and the lowest friction coefficient. The wear mechanism of the V-shaped microtexture is dominated by abrasive and adhesive wear. The V-shaped microtexture has excellent wear resistance under a side length of 300 µm, an interval of 300 µm and a depth of 20 µm.

Originality/value

This study is conductive to the design of wear-resistant surfaces for friction components.

中文翻译：

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数值模拟和实验表征V型显微织构7075铝合金表面摩擦磨损性能

目的

本研究的目的是设计和加工7075铝合金的最佳V形显微组织，并揭示其耐磨机理和性能。

设计/方法论/途径

建立了无纹理、V形、圆形和方形微纹理的动压润滑模型。探索了相应的油膜压力分布。摩擦磨损实验是在旋转装置上进行的。通过摩擦系数和表面形貌研究微观结构形状和尺寸对磨损机制的影响。

发现

相比之下，V形微观结构具有最大的油膜承载能力和最低的摩擦系数。 V形显微组织的磨损机制以磨粒磨损和粘着磨损为主。 V形微观纹理在边长300μm、间隔300μm、深度20μm下具有优异的耐磨性。

原创性/价值

该研究有助于摩擦部件耐磨表面的设计。