Abstract
Post-heat treatment was conducted on the Al-Zn-Mg-Cu-Sc-Zr alloy treated by friction stir processing (FSP) to optimize its strength and corrosion resistance. Different post-heat routes had significant bearing on the phase composition of the FSP sample, while its fine equiaxed grain structure could be retained during post heating. Enhanced strength of the FSP sample was obtained by post-heat treatments. The FSP sample after T6 treatment (artificial aging to peak hardness value after solid solution treatment) exhibited the highest strength in virtue of its high precipitation strengthening effect, and the high ductility of the FSP sample could be retained after solid solution treatment. Furthermore, the FSP sample presented better corrosion resistance after artificial aging and T6 treatment by reducing its solution atom numbers.
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This work was funded by the Science and Technology Major Project of Guangxi (Grant No. GKAA17202007)
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Hou, Y.F., Xiao, J.J., Liu, C.Y. et al. Effect of Heat Treatment on the Microstructure, Mechanical Properties, and Corrosion Resistance of Friction Stir Processed Al-Zn-Mg-Cu-Sc-Zr Alloy. J. of Materi Eng and Perform 30, 3398–3405 (2021). https://doi.org/10.1007/s11665-021-05608-4
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DOI: https://doi.org/10.1007/s11665-021-05608-4