Hu Ting , Yin Dengfeng , Yu Xinxiang , Cheng Rence , Cao Hanquan
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引用次数: 2
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 was investigated. The grain structure near the surface transforms from fibrous to coarse elongated recrystallized grain structure during homogenization at 550 °C for 4 h. The grain in the interior tends to be equiaxed with the temperature increasing. The primary particles are broken up after homogenization at 450 and 500 °C for 4 h, and coarsened when the temperature increases to 550 °C. The evolution of dispersoids is controlled by nucleation and growth mechanisms at 450 and 500 °C for 4 h, whereas the coarsening and dissolution are predominant mechanisms during homogenization at 550 °C for 4 h. Many small Zr-bearing dispersoids are obtained during homogenization at 500 °C for 4 h.
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