Abstract
In order to examine the effect of surplus phase on the microstructure and mechanical properties, different compositions with high Cu/Mg ratio of the T6-temper extruded Al-Cu-Mg-Ag alloys were studied in this investigation. The results show that the Al-5.6Cu-0.56Mg-0.4Ag alloy obtains superior mechanical properties at room temperature, while the yield strength of Al-6.3Cu-0.48Mg-0.4Ag alloy is 378 MPa at 200 °C, which is 200 MPa higher than that of Al-5.6Cu-0.56Mg-0.4Ag alloy. Although the excessive Cu content causes the slight strength loss and elongation decrease in the Al-6.3Cu-0.48Mg-0.4Ag alloy at room temperature, the surplus phases and recrystallized microstructure will play an effective role in strengthening the alloy at elevated temperature.
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This work was supported by The National Natural Science Foundation of China (No. 51071075) and The Deep Continental Scientific Drilling Equipment Development (SinoProbe-09-05), as well as by The 985 Project-Automotive Engineering of Jilin University.
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Xu, X., Zhao, Y., Wang, X. et al. Effect of Surplus Phase on the Microstructure and Mechanical Properties in Al-Cu-Mg-Ag Alloys with High Cu/Mg Ratio. J. of Materi Eng and Perform 24, 4322–4327 (2015). https://doi.org/10.1007/s11665-015-1722-8
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DOI: https://doi.org/10.1007/s11665-015-1722-8