The Effects of Titanium Dioxide (TiO2) Content on the Dry Sliding Behaviour of AA2024 Aluminium Composite

Q4 Engineering Journal of Mechanical Engineering Pub Date : 2023-09-15 DOI:10.24191/jmeche.v20i3.23910

Mudhar A. Al-Obaidi

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引用次数: 1

Abstract

The low density, low expansion coefficient, and strong corrosion resistance at room temperature of Aluminium alloys have made them a popular choice for engineering applications. In this study, Aluminium AA2024 alloys are prepared with different weight contents of ceramic material, titanium oxide (TiO2) nanoparticles (0%, 2.5%, 5%, and 7.5% wt.) of a particle size of 30 nm using the metal stir casting method. The hardness property and wear resistance with the effect of heat treatment are investigated using a pin-on-disc wear device for both the base alloy and the reinforced alloys. The result shows the prosperity of 5wt.% of TiO2 to attain the optimum hardness and wear resistance. Using the optimum content of TiO2 and heat treatment, the hardness and wear resistance of 5wt.% TiO2-AA2024 nanocomposite has been significantly improved after heat treatment over the unreinforced Aluminium matrix. Statistically, the hardness and wear resistance are improved by 68% and 22%, respectively. This is due to an increased number of fine precipitates besides their uniformly distributed after heat treatment. Furthermore, casting AA2024 Aluminium alloy material mainly has S (Al2CuMg) and Al3TiCu phases. The appearance of a large number of S phases causes a significant improvement in the properties of the alloy.

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二氧化钛(TiO2)含量对AA2024铝复合材料干滑动性能的影响

铝合金的低密度、低膨胀系数和在室温下较强的耐腐蚀性使其成为工程应用的热门选择。在本研究中，采用金属搅拌铸造法制备了30 nm粒径的不同重量含量的陶瓷材料、氧化钛(TiO2)纳米颗粒(重量为0%、2.5%、5%和7.5%)。采用针盘式磨损装置，研究了基体合金和增强合金在热处理条件下的硬度和耐磨性。结果表明5wt的繁荣。以获得最佳的硬度和耐磨性。采用TiO2的最佳含量和热处理，硬度和耐磨性达到5wt。经过热处理后，TiO2-AA2024纳米复合材料的性能明显优于未增强铝基体。据统计，硬度和耐磨性分别提高了68%和22%。这是由于热处理后除均匀分布外，细小析出物数量增加所致。铸造AA2024铝合金材料主要有S (Al2CuMg)和Al3TiCu相。大量S相的出现使合金的性能得到显著改善。

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来源期刊

Journal of Mechanical Engineering Engineering-Mechanical Engineering

CiteScore

1.00

自引率

0.00%

发文量

审稿时长

16 weeks

期刊介绍： Journal of Mechanical Engineering (formerly known as Journal of Faculty of Mechanical Engineering) or JMechE, is an international journal which provides a forum for researchers and academicians worldwide to publish the research findings and the educational methods they are engaged in. This Journal acts as a link for the mechanical engineering community for rapid dissemination of their academic pursuits. The journal is published twice a year, in June and December, which discusses the progress of Mechanical Engineering advancement.