| Summary: | 碩士 === 國立高雄科技大學 === 機械工程系 === 107 === Aluminum alloy has been a popular metal since the 20th century. With the continuous advancement of technology, aluminum alloy has also been applied to more different fields. From being used in transportation initially, it has gradually developed to be used in aerospace, civilization engineering, construction, etc. The reason why the aluminum alloy can last for a long time is mainly because of its many advantages and meets different needs of different applications. Its characteristics include light weight and easy to use in transportation. The surface of aluminum forms a film to avoid oxidation; therefore， it can be used in different conditions. Different strength can be obtained by adding different ingredients or given heat treatment. In this paper，aluminum–scandiumalloy provided by Taiwan Hodaka is discussed. aluminum–scandiumalloy can be widely used in aerospace structure, car body structure, 3C products. Most existing studies about the alloy are discussing the microstructures and static tensile tests; there are few dynamic tensile researches. The test piece of this experiment is M9 aluminum–scandium alloy, its characteristics include high strength, high toughness, and it is often used in aerospace materials, bicycle racks, baseball bats, tennis rackets, etc. In this paper, the Hopkinson tension bar is used to investigate the dynamic tensile deformation behavior of M9 aluminum–scandium alloy at different strain rates. The experiment is carried out at room temperature 25 °C. In the static tension tests, the MTS universal testing machine is used and the static mechanical properties of the M9 aluminum–scandium alloy were examined at three different speeds: 0.9, 9, 90 mm/min. Scanning electron microscopy (SEM) of the Instrument Center of the National Cheng Kung University were used to examine the microstructure damage before and after the experiment.
|
|---|
