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Tribological and wear performance of centrifuge cast functional graded copper based composite at dry sliding conditions

功能梯度铜基复合材料的制备及干摩擦磨损性能

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Abstract

Non lubricated slide performance of functional grade copper matrix composite, fabricated using horizontal centrifuge cast technique was investigated using pin-on-disc tribo-tester. Rate of wear and friction coefficient of the inner wall thickness of hollow cylindrical cast specimen was analyzed using Taguchi based L27 orthogonal array, where the percentage of graphite particles were observed higher. Variable process parameters those influenced the rate of wear directly or indirectly were: applied load (15, 25 and 35 N), slide velocity (1.5, 2.5 and 3.5 m/s) and slide distance (750, 1500 and 2250 m). Rate of wear and friction coefficient showed a proportional dependency with applied load and slide distance, whereas showing a decline during intermediate slide velocity. Signal-to-Noise ratio predicted the minimal tribo-condition, on ‘smaller-the-better’ basis. Analysis of Variance technique quantified the influence of affecting parameters, along with their interactions. Regression analysis was utilized for the validation of the experimental data. Micrographs and scanning electron microscopy exhibited the wear mechanisms and mechanically mixed layer formation during worn surfaces analysis.

摘要

采用水平离心铸造工艺, 制备功能梯度铜基复合材料, 并对其非润滑滑动性能进行了研究. 采用基于Taguchi 的L27 正交实验对石墨颗粒含量较高的空心圆柱铸件内壁厚度的磨损速率和摩擦系数进行分析. 直接或间接影响磨损速率的工艺参数包括: 施加的载荷(15, 25 和35 N)、滑动速度(1.5, 2.5 和3.5 m/s)和滑动距离(750, 1500 和2250 m). 磨损速率和摩擦系数与施加的载荷和滑动距离呈比例的依赖性, 而在中间滑动速度期间表现出下降. 信噪比在“较小-较好”的基础上预测最小三波条件. 方差分析量化参数的影响及其相互作用. 采用回归分析对实验数据进行验证. 在磨损表面分析过程中, 通过显微镜和扫描电子显微镜发现磨损机制和机械混合层的形成.

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Authors and Affiliations

  1. Deptartment of Mechanical Engineering, Amrita School of Engineering, Amrita Vishwa Vidyapeetham, Coimbatore, 641112, India

    N. Radhika & Manu Sam

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  1. N. Radhika
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  2. Manu Sam
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Correspondence to N. Radhika.

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Foundation item: Project(ERIP/ER/1503188/M/01/1587) supported by the Financial and Technological Support from Defense Research and Development Organization-DRDO, India

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Radhika, N., Sam, M. Tribological and wear performance of centrifuge cast functional graded copper based composite at dry sliding conditions. J. Cent. South Univ. 26, 2961–2973 (2019). https://doi.org/10.1007/s11771-019-4228-y

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  • DOI: https://doi.org/10.1007/s11771-019-4228-y

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