MECHANISM OF SUPERPLASTIC DEFORMATION IN ALUMINIUM ALLOY 2214
LIU Runguang;JIANG Haomin;JIANG Yong(Harbin Institute of Technology;Harbin 150001);PENG Fulin;YIN Fulin;ZHANG Hongzheng(Harbin Aeroplane Manufacture Coporation;Harbin 150066)(Manuscript received 1995-01-31;in revised form 1996-03-25)
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LIU Runguang;JIANG Haomin;JIANG Yong(Harbin Institute of Technology;Harbin 150001);PENG Fulin;YIN Fulin;ZHANG Hongzheng(Harbin Aeroplane Manufacture Coporation;Harbin 150066)(Manuscript received 1995-01-31;in revised form 1996-03-25). MECHANISM OF SUPERPLASTIC DEFORMATION IN ALUMINIUM ALLOY 2214. Acta Metall Sin, 1996, 32(12): 1244-1247.
Abstract During the superplastic deformation of warm-rolled aluminium alloy 2214,the dislocation density in the grain remains equilibration to some extent because of the effect of dynamic recovery and recrystallization. The dominant deformation mechanism is grain-boundary sliding.The dislocation sliding in grain and diffusion creep, as two kinds of important coordination mechanism,promote the development of grain-boundary sliding.The superplastic deformation mechanism accords with the model of dislocation coordinating grain-boundary sliding.