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首页> 外文期刊>Tribology letters >Dry Sliding Wear Behaviour of Aluminium Al-Si12Cu/TiB2 Metal Matrix Composite Using Response Surface Methodology
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Dry Sliding Wear Behaviour of Aluminium Al-Si12Cu/TiB2 Metal Matrix Composite Using Response Surface Methodology

机译：响应面法研究Al-Si12Cu / TiB2铝基复合材料的干滑磨损行为

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摘要

An aluminium Al-Si12Cu/TiB2 metal matrix composite was fabricated using the liquid metallurgy route, and its dry sliding wear characteristics were investigated under various sliding parameters. The titanium diboride (TiB2) particles (10 wt%, average size 50-60 mu m) were incorporated into the matrix and its microstructural characteristic was examined. A five-level central composite design experiment was developed using response surface methodology; parameters such as load, velocity and sliding distance were varied in the range of 10-50 N, 1-5 m/s and 500-2500 m, respectively. Dry sliding wear tests were performed as per the experimental design using a pin-ondisc tribometer at room temperature. Significance tests, analyses of variance and confirmatory tests were performed to validate the developed model. Study of the microstructural characteristics revealed uniform dispersion of the reinforcement particles throughout the composite. The regression result showed that the developed model performed well in relating the wear process parameters with the response and predicting the wear behaviour of the composite. The surface plot showed that wear rate increased with increasing load at all velocities and distances, and decreased with increasing sliding distance. In the case of velocity, the wear rate decreased initially, increasing after the transition velocity had been reached. Scanning electron microscopy analysis revealed severe wear at a high load due to a higher level of deformation of the composite surface.
机译：采用液态冶金方法制备了铝-Al-Si12Cu / TiB2金属基复合材料，并研究了其在各种滑动参数下的干式滑动磨损特性。将二硼化钛（TiB2）颗粒（10 wt％，平均尺寸为50-60μm）掺入基体中，并检查其微结构特征。使用响应面方法开发了一个五级中央复合设计实验;负载，速度和滑动距离等参数分别在10-50 N，1-5 m / s和500-2500 m的范围内变化。根据实验设计，使用销钉盘式摩擦计在室温下进行干式滑动磨损测试。进行了显着性检验，方差分析和确认检验以验证开发的模型。对微结构特征的研究表明增强颗粒在整个复合材料中均匀分散。回归结果表明，所开发的模型在将磨损过程参数与响应相关联并预测复合材料的磨损行为方面表现良好。表面图表明，在所有速度和距离下，磨损率均随载荷的增加而增加，而随着滑动距离的增加，磨损率则下降。在速度情况下，磨损率最初降低，在达到过渡速度后增加。扫描电子显微镜分析显示，由于复合材料表面的变形程度较高，因此在高负荷下严重磨损。

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