Curve extrusion processes,including symmetric curve extrusion(SCE)and asymmetric curve extrusion(ACE)processes,were proposed to fabricate Mg-3Al-1Zn(AZ31)alloy sheets with the aim of improving planar anisotropy.For comparison,traditional extrusion(TE)was conducted on producing AZ31 sheets.The dynamic recrystallization and flow behavior of AZ31 Mg alloy during extrusion were examined and analyzed,and the final microstructures and mechanical properties of AZ31 sheets were investigated.In comparison with the TE sheet,finer grain size,more uniform microstructure and weaker tilted basal tex-ture were achieved in the SCE and ACE sheets.Both the SCE and ACE sheets exhibited unique textures which basal poles tilted to extrusion direction(ED)and new transverse direction(TD)-tilted texture com-ponent was developed.The reasons were mainly ascribed to the introduction of additional flow velocity difference along TD during extrusion.Furthermore,the ACE sheet exhibited the lowest basal pole inten-sity,which was attributed to the introduction of extra asymmetric shear deformation during extrusion process.As a result,the ACE sheet showed the lowest yield strength and r-value,but highest elongation and n-value.Improving the planar anisotropy of AZ31 sheet was achieved by the ACE process.

Jun Xu;Bin Jiang;Yuehua Kang;Jun Zhao;Weiwen Zhang;Kaihong Zheng;Fusheng Pan

Institute of New Materials,Guangdong Academy of Sciences,Guangzhou 510650,China;National Engineering Research Centre of Near-net-shape Forming for Metallic Materials,South China University of Technology,Guangzhou,510641,China;State Key Laboratory of Mechanical Transmissions,College of Materials Science and Engineering,Chongqing University,Chongqing 400044,China;School of Mechanical and Electrical Engineering,Hunan City University,Yiyang,413002,China

材料科学技术（英文版）

[1]Jun Xu;Bin Jiang;Yuehua Kang;Jun Zhao;Weiwen Zhang;Kaihong Zheng;Fusheng Pan-.Tailoring microstructure and texture of Mg-3Al-1Zn alloy sheets through curve extrusion process for achieving low planar anisotropy)[J].材料科学技术（英文版）,2022(18):48-60

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