期刊
JOURNAL OF COMPOSITE MATERIALS
卷 56, 期 17, 页码 2727-2738出版社
SAGE PUBLICATIONS LTD
DOI: 10.1177/00219983221103636
关键词
Al-TiO2 nanocomposites; accumulative roll bonding; Microhardness; Tensile strength; wear resistance
资金
- Deanship of Scientific Research (DSR) at King Abdulaziz University, Jeddah [230-1351443]
In this study, an Al-TiO2 nanocomposite was processed using the ARB process. After five passes, the TiO2 particles were uniformly dispersed and the matrix had ultrafine and elongated grains. The addition of TiO2 nanoparticles significantly improved the microhardness and tensile strength of the specimens.
Aluminum (Al) composites have been extensively developed for automotive applications due to their high specific strength. Therefore, in this study, an Al-titanium dioxide (TiO2) nanocomposite was processed using the accumulative roll bonding (ARB) process. The mechanical characteristics of monolithic and nanocomposites specimens made with 0, 1, 2, and 3 wt% TiO2 nanoparticles as reinforcement were studied at several ARB passes. According to the microstructure of the composites, rolling after five passes achieves a homogenous distribution of reinforcement particles, ultrafine and elongated grains of the matrix. After five ARB passes, the TiO2 particles were uniformly dispersed. Finally, scanning electron microscopy and energy dispersive spectroscopy revealed that the Al-TiO2 nanocomposite had an appropriate dispersion of TiO2 nanoparticles. Vickers microhardness improves as the number of accumulative roll bonding passes increases. Furthermore, after five passes, Vickers microhardness testing revealed that the sample with 3%TiO2 has the greatest hardness value of 112 HV, which is significantly greater than the 44 HV hardness value of the ARB-processed aluminum. The mechanical properties of the specimens, yield and ultimate strengths, improved with the addition of TiO2 nanoparticles. Due to good bonding among the components, mechanical parameters such as microhardness and tensile strength were more than three times better than the Al matrix.
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