Achieving high ductility and low in-plane anisotropy in magnesium alloy through a novel texture design strategy  

作　　者：Shi Liu Cheng Wang Hong Ning Zhao-Yuan Meng Kai Guan Hui-Yuan Wang 

机构地区：[1]State Key Laboratory of Automotive Simulation and Control,Jilin University,PR China [2]Key Laboratory of Automobile Materials of Ministry of Education&School of Materials Science and Engineering,Nanling Campus,Jilin University,No.5988 Renmin Street,Changchun,130025 PR China [3]State Key Laboratory of Reliability and Intelligence of Electrical Equipment,School of Material Science and Engineering,Hebei University of Technology,Tianjin,300130 PR China

出　　处：《Journal of Magnesium and Alloys》2024年第7期2863-2873,共11页镁合金学报（英文）

基　　金：supports from The National Natural Science Foundation of China(nos.52222409,52074132,and U19A2084);The National Key Research and Development Program(no.2022YFE0122000)are greatly acknowledged;support from The Science and Technology Development Program of Jilin Province(no.20210301025GX).

摘　　要：Texture regulation is a prominent method to modify the mechanical properties and anisotropy of magnesium alloy.In this work,the Mg-1Al-0.3Ca-0.5Mn-0.2Gd(wt.%)alloy sheet with TD-tilted and circular texture was fabricated by unidirectional rolling(UR)and multidirectional rolling(MR)method,respectively.Unlike generating a strong in-plane mechanical anisotropy in conventional TD-tilted texture,the novel circular texture sample possessed a weak in-plane yield anisotropy.This can be rationalized by the similar proportion of soft grains with favorable orientation for basalslip and{10.12}tensile twinning during the uniaxial tension of circular-texture sample along different directions.Moreover,compared with the TD-tilted texture,the circular texture improved the elongation to failure both along the rolling direction(RD)and transverse direction(TD).By quasi-in-situ EBSD-assisted slip trace analysis,higher activation of basal slip was observed in the circular-texture sample during RD tension,contributing to its excellent ductility.When loading along the TD,the TD-tilted texture promoted the activation of{10.12}tensile twins significantly,thus providing nucleation sites for cracks and deteriorating the ductility.This research may shed new insights into the development of formable and ductile Mg alloy sheets by texture modification.

关 键 词：Magnesium alloy TD-tilted texture Circular texture In-plane yield anisotropy DUCTILITY 

分 类 号：TG146.22[一般工业技术—材料科学与工程]