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1The effects of orientation control via tension-compression on microstructural evolution and mechanical behavior of AZ31 Mg alloy sheet显示文摘The grain orientation control via twinning activity on deformation features is of great significance to offer a key insight into understanding the deformation mechanism of Mg alloy sheets.The{10–12}twinning were performed by pre-strain paths,i.e.,tension(6%)and compression(5%)perpendicular to the c-axis along extrusion direction(ED),to investigate the microstructural evolution and mechanical properties of AZ31 Mg alloy sheets.The distinction in the texture evolution and strain hardening behavior was illustrated in connection with the pre-strain paths for the activities of twinning and slip.The result shows that the activation of the deformation mode was closely bound up with the grain orientation and the additional applied load direction.The{10–12}twin-texture components with c-axis//ED were generated by precompression,which can provide an appropriate alternative to accommodate the thin sheet thickness strain and enhance the room temperature formability of Mg alloy sheet.Qingshan Yang Bin Jiang Bo Song Zujian Yu Dewei He Yanfu Chai Jianyue Zhang Fusheng Pan 2022Journal of Magnesium and Alloys2022,10,2:4
2镁合金中孪生-退孪生行为的原位EBSD研究显示文摘通过沿轧制方向和法线方向交叉压缩,利用原位EBSD跟踪研究了孪生-退孪生行为。结果表明:c轴远离ND方向的初始晶粒,沿RD预压缩不会产生孪晶,c轴平行于ND方向的初始晶粒,沿RD预压缩形成2种形貌的孪晶,一种为互相交叉的孪晶,另一种为互相平行的孪晶;当沿着ND方向再压缩时,c轴远离ND方向的初始晶粒中会形核拉伸孪晶,而互相交叉和平行的拉伸孪晶会出现退孪生行为;互相交叉孪晶的退孪生速度较慢,而互相平行孪晶的退孪生速度较快。最后,基于实验观察,讨论了退孪生时孪晶界的迁移过程。席国强 陈艺 陈爽 付婧 郭非 麻彦龙 2020重庆理工大学学报(自然科学)2020,34,9:2
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