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<p>Production of AA5754 by twin-roll casting followed by cold rolling has been receiving much attention recently due to economical and environmental advantages. High solidification rates experienced during twin-roll casting result in differentiated as-cast microstructure compared to that of direct chill casting and lead to different recrystallization kinetics. In this study, recrystallization behavior of twin-roll cast cold-rolled AA5754 alloy was investigated. AA5754 alloy was cast with two different manganese contents, and samples were subjected to three different processing routes involving annealing and cold rolling. Recrystallization behavior was expressed in terms of Johnson-Mehl-Avrami-Kolmogorov equation according to the yield strengths. Results show that addition of Mn into AA5754 retards the recrystallization and increases the apparent activation energy. On the other hand, regardless of the Mn content, intermediate annealing leads to higher activation energy. Lower amount of cold deformation prior to soft annealing also results in higher activation energy.</p>

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Influence of Chemical Composition and Processing on Softening Behavior of Twin-Roll Cast AA5754 Alloy

  • 期刊论文

  • 发表日期：

    2025年4月3日

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  • Ahmet Kabil,
  • Hatice Mollaoğlu Altuner,
  • Onur Meydanoğlu

摘要

Production of AA5754 by twin-roll casting followed by cold rolling has been receiving much attention recently due to economical and environmental advantages. High solidification rates experienced during twin-roll casting result in differentiated as-cast microstructure compared to that of direct chill casting and lead to different recrystallization kinetics. In this study, recrystallization behavior of twin-roll cast cold-rolled AA5754 alloy was investigated. AA5754 alloy was cast with two different manganese contents, and samples were subjected to three different processing routes involving annealing and cold rolling. Recrystallization behavior was expressed in terms of Johnson-Mehl-Avrami-Kolmogorov equation according to the yield strengths. Results show that addition of Mn into AA5754 retards the recrystallization and increases the apparent activation energy. On the other hand, regardless of the Mn content, intermediate annealing leads to higher activation energy. Lower amount of cold deformation prior to soft annealing also results in higher activation energy.