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Dry sliding wear analysis OF Al5083/CNT/Ni/MoB hybrid composite using DOE Taguchi method
Wear ( IF 5 ) Pub Date : 2020-11-01 , DOI: 10.1016/j.wear.2020.203471
A.H. Sajeeb Rahiman , D.S Robinson Smart , Boby Wilson , Irshad Ebrahim , Bibin Eldhose , Basil Mathew , Rony Thomas Murickan

Abstract Aluminium alloys with its low density and high strength to weight ratio have extensive applications in aerospace, marine and automobile industries. In this work Al5083/CNT/MoB/Ni hybrid composite has been compo casted to improve the corrosion resistance and to compensate the well-known low strength, deficient hardness and inadequate wear resistance of Aluminium alloys. Fabrication of the hybrid is done with 1.5 wt % of CNT, 8 wt% of Ni and varying wt% of MoB from 1 to 4 (composite A to D). Dry sliding wear analysis of composites is conducted on a pin on disc tribotester at room temperature using Taguchi L16 orthogonal array with varying load (10 N, 20 N, 30 N and 40 N), sliding velocity (0.5 m, 1.5 m, 2.5 m and 3.5 m) and wt% of MoB (1–4) as parameters. The significance and contributions of parameters on wear behavior is investigated by analysis of variance (ANOVA) and the correlation between parameters is obtained by a regression equation. Weight percentage of MoB is found to be the most contributing parameter (57.09%), followed by sliding velocity and load. The paper includes study and analysis of wear rate, micro wear mechanisms and transfer of materials involved with the tribosystem. Analysis of Optical microscopy, Scanning Electron Microscopy and EDX of the worn surface reveals that there is a shift in wear mechanism from adhesive to abrasive with increase in wt% of MoB. The three body rolling abrasion, the oxide tribo layer and the formation of Mechanical Mixed Layer (MML) between the sliding surfaces are observed to be the reasons for the decreased wear rate of the optimum composite. The result from experimentation shows close tolerance with statistical analysis.

中文翻译:

使用 DOE Taguchi 方法对 Al5083/CNT/Ni/MoB 混合复合材料进行干滑动磨损分析

摘要 铝合金密度低、强度重量比高,在航空航天、船舶和汽车工业中有着广泛的应用。在这项工作中,Al5083/CNT/MoB/Ni 混合复合材料已被复合铸造,以提高耐腐蚀性并弥补众所周知的铝合金强度低、硬度不足和耐磨性不足的问题。混合体的制造是用 1.5 wt% 的 CNT、8 wt% 的 Ni 和从 1 到 4(复合材料 A 到 D)的不同重量百分比的 MoB 完成的。在室温下,使用田口 L16 正交阵列在不同载荷(10 N、20 N、30 N 和 40 N)、滑动速度(0.5 m、1.5 m、2.5 m)下,在圆盘摩擦试验机上的销上对复合材料进行干滑动磨损分析和 3.5 m) 和重量百分比的 MoB (1-4) 作为参数。通过方差分析(ANOVA)研究参数对磨损行为的重要性和贡献,并通过回归方程获得参数之间的相关性。发现 MoB 的重量百分比是影响最大的参数 (57.09%),其次是滑动速度和载荷。论文包括磨损率、微磨损机制和与摩擦系统有关的材料转移的研究和分析。对磨损表面的光学显微镜、扫描电子显微镜和 EDX 分析表明,随着 MoB 重量百分比的增加,磨损机制从粘合剂转变为磨料。观察到三体滚动磨损、氧化物摩擦层和滑动表面之间机械混合层(MML)的形成是最佳复合材料磨损率降低的原因。
更新日期:2020-11-01
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