| Summary: | 碩士 === 國立中央大學 === 機械工程學系在職專班 === 101 === The research adopts the material of AA5083-O sheet alloy to be the subjective and do several experiments for two materials—the rolling sheet alloy and the rolling sheet ally after annealing. With different mechanic tests for these two materials, we find some differences of AA5083-O sheet alloy before and after rolling and its related change of inner microstructure. For the rolling sheet alloy after annealing, we also do experiments of hardness, room-temperature tensile strength and high-temperature tensile strength.
The research shows that the 5083 alloy can produce grain refining structure which is smaller than 10μm when it is processed by 90% rolling, 400℃ heating for 30 minutes and annealing. For high-temperature tensile strength experiment, the elenglation can achieve 413.33% which represents good quality of superplasticity
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