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Microstructure and properties of A2017 alloy strips processed by a novel process by combining semisolid rolling, deep rolling, and heat treatment

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文摘 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.
来源 International Journal of Minerals , Metallurgy and Materials,2013,20(8):770-778 【核心库】
DOI 10.1007/s12613-013-0795-3
关键词 aluminum alloys ; semisolid rolling ; heat treatment ; microstructure ; mechanical properties
地址

College of Materials and Metallurgy, Northeastern University, Shenyang, 110819

语种 英文
文献类型 研究性论文
ISSN 1674-4799
学科 金属学与金属工艺
基金 supported by the National Natural Science Foundation for Outstanding Young Scholars of China ;  国家自然科学基金 ;  the Fok Ying Tong Education Foundation ;  the Basic Scientific Research Operation of Center Universities ;  国家973计划
文献收藏号 CSCD:4902923

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引证文献 1 篇

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