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胡婷,尹登峰,余鑫祥,程仁策,曹汉权.均匀化退火对低Fe/Si 比Al-Mn合金微观组织演变的影响[J].稀有金属材料与工程(英文),2018,47(9):2631~2636.[Hu Ting,Yin Dengfeng,Yu Xinxiang,Cheng Rence and Cao Hanquan.Evolution of microstructure in low Fe/Si Al-Mn alloy during homogenization[J].Rare Metal Materials and Engineering,2018,47(9):2631~2636.]
Evolution of microstructure in low Fe/Si Al-Mn alloy during homogenization
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Received:February 23, 2017  Revised:March 28, 2017
DOI:
Key words: Al-Mn alloy, homogenization, microstructure, dispersoids, primary particles
Foundation item:山东省重点研发计划项目 (2015GGX102021);广东省应用型科技研发专项资金项目(2015B090926007)
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Hu Ting,Yin Dengfeng,Yu Xinxiang,Cheng Rence and Cao Hanquan  
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Abstract:
      The evolution of microstructure in Al-Mn alloy with a low ratio of Fe/Si produced by twin-roll casting (TRC) during various homogenization treatments has been investigated. The grain structure near the surface transforms from fibrous to coarse elongated recrystallized grain structure during homogenization at 550℃ for 4h. The grain in the interior tends to be equiaxed with the temperature. The primary particles are broken up after homogenization at 450℃ and 500℃ for 4h, respectively, and coarsened when temperature increases to 550℃. The evolution of dispersoids is controlled by nucleation and growth mechanisms at 450℃ and 500℃ for 4h, respectively, whereas the coarsening and dissolution are predominant mechanisms during homogenization at 550℃ for 4h. Many small size Zr-bearing dispersoids are obtained during homogenization at 500℃ for 4h.