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Effects of friction stir processing on the microstructure and mechanical properties of Al-Mg-Sc alloy

Journal Article


Abstract


  • Friction-stir processing (FSP) imposed a remarkable grain refining effect on Al-5Mg-0.2Sc alloy, changing typical dendritic microstructure into fine and equiaxed recrystallized grains. Such effect was found to be related to intense plastic deformation and high-temperature exposure, resulting in occurrence of dynamic recrystallization. During this process, Al3Sc dispersoids due to the addition of 0.2 % Sc in a high density were precipitated and effectively hindered the migration of grain boundaries and subsequent grain growth, giving rise to a significant grain-refining strengthening effect. On the other hand, these Al3Sc precipitates caused an additional substructure strengthening and precipitation strengthening effect. An attractive comprehensive property of Al-5Mg-0.2Sc alloy subjected to FSP was obtained.

Publication Date


  • 2018

Citation


  • Pan, D., Zhou, S., Li, Y., Zhan, Z., Li, H., & Wu, Y. (2018). Effects of friction stir processing on the microstructure and mechanical properties of Al-Mg-Sc alloy. Praktische Metallographie/Practical Metallography, 55(6), 370-386. doi:10.3139/147.110527

Scopus Eid


  • 2-s2.0-85049103643

Web Of Science Accession Number


Start Page


  • 370

End Page


  • 386

Volume


  • 55

Issue


  • 6

Abstract


  • Friction-stir processing (FSP) imposed a remarkable grain refining effect on Al-5Mg-0.2Sc alloy, changing typical dendritic microstructure into fine and equiaxed recrystallized grains. Such effect was found to be related to intense plastic deformation and high-temperature exposure, resulting in occurrence of dynamic recrystallization. During this process, Al3Sc dispersoids due to the addition of 0.2 % Sc in a high density were precipitated and effectively hindered the migration of grain boundaries and subsequent grain growth, giving rise to a significant grain-refining strengthening effect. On the other hand, these Al3Sc precipitates caused an additional substructure strengthening and precipitation strengthening effect. An attractive comprehensive property of Al-5Mg-0.2Sc alloy subjected to FSP was obtained.

Publication Date


  • 2018

Citation


  • Pan, D., Zhou, S., Li, Y., Zhan, Z., Li, H., & Wu, Y. (2018). Effects of friction stir processing on the microstructure and mechanical properties of Al-Mg-Sc alloy. Praktische Metallographie/Practical Metallography, 55(6), 370-386. doi:10.3139/147.110527

Scopus Eid


  • 2-s2.0-85049103643

Web Of Science Accession Number


Start Page


  • 370

End Page


  • 386

Volume


  • 55

Issue


  • 6