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Influence of rolling route on microstructure and mechanical properties of AZ31 magnesium alloy during asymmetric reduction rolling

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Transactions of Nonferrous Metals Society of China 2018年第5期28卷 902-911页

作者： Ru MA Yue LU Ling WANG Yi-nong WANG School of Materials Science and Engineering Dalian University of Technology Dalian 116024 China School of Materials and Metallurgy Northeastern University Shenyang 110819 China

Four different routes of asymmetric reduction rolling were conducted on AZ31 magnesium alloy to investigate their effect on the microstructure evolution and mechanical properties. Route A is the forward rolling; while during routes B and C the sheets are rotated 180o in rolling direction and normal direction, respectively; route D is the unidirectional rolling. The strain states of rolled sheets were analyzed by the finite element method, while the microstructure and texture were observed using optical microscopy, X-ray diffraction and electron back-scattered diffraction techniques, and the mechanical properties were measured by tensile test. The results show that route D produced the largest effective strain. Compared with other samples, sample D exhibited a homogeneous microstructure with fine grains as well as a weak and tilted texture, in corresponding, it performed excellent tensile properties, which suggested that route D was an effective way to enhance the strength and plasticity of AZ31 sheet.

关键词： AZ31 Mg alloy asymmetric reduction rolling rolling route fmite element analysis mechanical properties

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