Effect of Load on the Tribological Properties of Eutectic Al-Si Reinforced n-Al2O3 under Dry Sliding Conditions

IF 1.5 Q3 ENGINEERING, MECHANICAL
P. D. Srivyas, M. Charoo
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引用次数: 3

Abstract

Advanced composites are the materials of the new generation. Hence, the focus of the study is to determine the tribological properties of the eutectic Al-Si alloy reinforced with (2, 4, 6, 8, and10 wt. %) of n-Al2O3 against chrome-plated steel ball under dry sliding conditions. The novelty of this work is the fabrication of the composite sample with this elemental composition, which is not done before. Spark plasma sintering (SPS) nonconventional fabrication method is used to fabricate advanced composite samples. Friction coefficient (COF) and wear rate of the composite samples were studied under high load, varying from 50 N to 300 N, using the ball-on-disc tribometer configuration, with other parameters such as stroke, frequency, sliding distance, and sliding velocity remaining constant at 2 mm, 30 Hz, 120 meter, and 0.120 m/s, respectively. Reduction in wear volume for the advanced composite was reported in the range 15.45–44.58% compared to the base alloy (eutectic Al-Si alloy). An increase in friction coefficient was reported in the range 28.80–35.65% compared to the base matrix alloy material. It was also reported that the wear rate increases and the friction coefficient of the composite sample decreases with an increase in load for the tribo-pair. It was observed that an increase in the wt. % of reinforcement influences the friction and wear behavior of the composite. Wear mechanism at high load was characterized by plastic deformation, adhesion, delamination, and abrasion wear. For pre- and postcharacterization of surface and worn tracks, scanning electron microscopy (SEM) electron dispersion spectroscopy (EDS), 3D surface profilometer, and optical microscopy were used. This work aimed to investigate the influence of load on the tribological properties of Al-Si eutectic reinforced n-Al2O3 under dry sliding conditions. Its main objective was to provide a new contribution to the tribological behavior of these composites fabricated using the nonconventional spark plasma sintering method.
干滑动条件下载荷对共晶Al-Si增强n-Al2O3摩擦学性能的影响
高级复合材料是新一代的材料。因此,研究的重点是确定用(2、4、6、8和10 wt. %) n-Al2O3增强的共晶Al-Si合金与镀铬钢球在干滑动条件下的摩擦学性能。这项工作的新颖之处在于用这种元素组成制作复合样品,这是以前没有做过的。采用火花等离子烧结(SPS)非常规制备方法制备了先进的复合材料样品。在高载荷(50 ~ 300 N)条件下,采用球盘式摩擦计配置,研究复合材料试样的摩擦系数(COF)和磨损率,其他参数如行程、频率、滑动距离和滑动速度分别在2 mm、30 Hz、120 m和0.120 m/s下保持不变。据报道,与基体合金(共晶Al-Si合金)相比,先进复合材料的磨损体积减少了15.45-44.58%。与基基合金材料相比,摩擦系数增加了28.80 ~ 35.65%。随着摩擦副载荷的增加,复合材料试样的磨损率增加,摩擦系数降低。结果表明,增强体wt %的增加会影响复合材料的摩擦磨损性能。高载荷下的磨损机制主要表现为塑性变形、粘附、脱层和磨损。对于表面和磨损轨迹的前后表征,使用了扫描电子显微镜(SEM)、电子色散光谱(EDS)、3D表面轮廓仪和光学显微镜。本文旨在研究干滑动条件下载荷对Al-Si共晶增强n-Al2O3摩擦学性能的影响。其主要目的是为这些使用非常规火花等离子烧结方法制造的复合材料的摩擦学性能提供新的贡献。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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来源期刊
Advances in Tribology
Advances in Tribology ENGINEERING, MECHANICAL-
CiteScore
5.00
自引率
0.00%
发文量
1
审稿时长
13 weeks
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