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effects of creep-aging processing on the corrosion resistance and mechanical properties of a typical al-cu-mg alloy

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materials science&engineeringa605(2014)192–202,-0001,():

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摘要/描述

creep-aging forming, combining both the aging treatment and forming process, has recently drawn much attention of researchers. in this study, the effects of creep-aging processing on the corrosion resistance and mechanical properties of a typical al-cu-mg alloy are investigated by electrochemical corrosion, exfoliation corrosion and uniaxial tensile experiments. the results show that the corrosion resistance and mechanical properties of the studied al-cu-mg alloy are strongly sensitive to the creep-aging processing parameters. the creep-aging processing can change the dimension and density of nanoprecipitates, which greatly affects the corrosion resistance and mechanical properties of the studied al-cu-mg alloy. with the increase of creep-aging temperature, the corrosion resistance and the elongation decrease, while the yield strength and ultimate tensile strength increase. for the materials creep-aged in “under aging” and “peak aging” conditions, the applied stress can increase the ultimate tensile strength, but deteriorate the corrosion resistance.

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