Microstructure and properties of A2017 alloy strips processed by a novel process by combining semisolid rolling,deep rolling,and heat treatment
来源期刊：International Journal of Minerals Metallurgy and Materials2013年第8期
论文作者：Ren-guo Guan Xiang Wang Zhan-yong Zhao Wei-wei Wang Fu-rong Cao Chun-ming Liu
文章页码：770 - 778
摘 要：A novel short process for producing A2017 alloy strips with notable features of near net shape,saving energy,low cost,and high product performance was developed by combining semisolid rolling,deep rolling,and heat treatment.The microstructure and properties of the A2017 alloy strips were investigated by metallographic microscopy,scanning electron microscopy,transmission electron microscopy,X-ray diffraction,tensile testing,and hardness measurement.The cross-sectional microstructure of the A2017 alloy strips is mainly composed of near-spherical primary grains.Many eutectic phases CuAl 2 formed along primary grain boundaries during semisolid rolling are crushed and broken into small particles.After solution treatment at 495 C for 2 h the eutectic phases at grain boundaries have almost dissolved into the matrix.When the solution treatment time exceeds 2 h,grain coarsening happens.More and more grain interior phases precipitate with the aging time prolonging to 8 h.The precipitated particles are very small and distribute homogenously,and the tensile strength reaches its peak value.When the aging time is prolonged to 12 h,there is no obvious variation in the amount of precipitated phases,but the size and spacing of precipitated phases increase.The tensile strength of the A2017 alloy strips produced by the present method can reach 362.78 MPa,which is higher than that of the strips in the national standard of China.
Ren-guo Guan，Xiang Wang，Zhan-yong Zhao，Wei-wei Wang，Fu-rong Cao，Chun-ming Liu
College of Materials and Metallurgy,Northeastern University
摘 要：A novel short process for producing A2017 alloy strips with notable features of near net shape,saving energy,low cost,and high product performance was developed by combining semisolid rolling,deep rolling,and heat treatment.The microstructure and properties of the A2017 alloy strips were investigated by metallographic microscopy,scanning electron microscopy,transmission electron microscopy,X-ray diffraction,tensile testing,and hardness measurement.The cross-sectional microstructure of the A2017 alloy strips is mainly composed of near-spherical primary grains.Many eutectic phases CuAl 2 formed along primary grain boundaries during semisolid rolling are crushed and broken into small particles.After solution treatment at 495 C for 2 h the eutectic phases at grain boundaries have almost dissolved into the matrix.When the solution treatment time exceeds 2 h,grain coarsening happens.More and more grain interior phases precipitate with the aging time prolonging to 8 h.The precipitated particles are very small and distribute homogenously,and the tensile strength reaches its peak value.When the aging time is prolonged to 12 h,there is no obvious variation in the amount of precipitated phases,but the size and spacing of precipitated phases increase.The tensile strength of the A2017 alloy strips produced by the present method can reach 362.78 MPa,which is higher than that of the strips in the national standard of China.
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