| Summary: | 博士 === 崑山科技大學 === 機械與能源工程研究所 === 106 === Damage caused by the mechanical parts caused by wear and tear always seriously affect the accuracy of machinery. Hence, it is necessary to improve the material properties of the mechanical elements for mechanical engineers. Furthermore, low friction plays an important role in saving energy. It is important to establish a key technology for wear resistance and low friction through appropriate materials science for related industries. In general, the tribological properties of aluminum alloys are very different from those of steels. Hence, aluminum alloys should be specially considered and clarified for their tribological properties before being applied industrially.
This paper therefore aims to further investigate the effects of the content of doping elements on the friction and wear of the selected aluminum alloys. Moreover, effects of T6 heat treatment on Tribological properties are also investigated. From the experimental results, it can be concluded that the higher the silicon content, the smaller the friction coefficient. The higher the content of iron and copper, the more materials are removed, showing better machinability. Moreover, three frictional models and wear mechanisms that describe the effects of the content of doping elements on the friction and wear are proposed. The wear mechanisms change as the silicon content increases, from the junction growth to the wedge and the ploughing particles. By the three models, better choices of aluminum alloys with regards to friction and wear can then be made. These results have great practical importance.
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