Promoting hybrid twins structure to reduce yield asymmetry of rolled AZ31 plates by combining side-rolling and torsion

查看全文 作　　者：Bo [1]Song;Meng [1]Wang;Ruolan [1]Shi;Zhiwen [1]Du;Ning [1]Guo;Fang [1]Wang;Shengfeng [1]Guo

机构地区：[1]School of Materials and Energy,Southwest University,Chongqing,China

出　　处：《Journal of Magnesium and Alloys》索引2023年第11卷第6期,共10页

基　　金：supported by the National Natural Science Foundation of China,No.51601154。 摘　　要：In this work,an as-rolled AZ31 square bar with c-axis//ND(normal direction)texture was used.Side-rolling and reciprocating torsion were performed to treat the bar.Microstructure evolution and tensile-compressive properties were investigated in detail.Initial rolled AZ31 bar exhibits a large yield asymmetry along the rolling direction(RD).Reciprocating torsion can generate extension twins to introduce twin boundaries and twin-texture.The twin structure can reduce yield asymmetry.However,only limited regions in the rolled AZ31 bar can be twinned during torsion.Pre-side-rolling along the transverse direction(TD)can generate two texture components(c-axis//TD texture and c-axis//ND texture)by introducing profuse{10–12}twins.Such dual texture components help increase the regions which are favorable for twinning during torsion.Finally,combining side-rolling and reciprocating torsion generates hybrid{10–12}twins structure on the entire cross-section,resulting in a remarkably low yield asymmetry.The relevant mechanisms were discussed in detail. 关键词：AZ31 Square section TORSION Hybrid twins Orientation Yield asymmetry

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Promoting hybrid twins structure to reduce yield asymmetry of rolled AZ31 plates by combining side-rolling and torsion

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