Reduction effect of final-pass heavy reduction rolling on the texture development,tensile property and stretch formability of ZWK100 alloy plates

作     者：B.Q.Shi L.Y.Zhao X.L.Shang B.H.Nie D.C.Chen C.Q.Li Y.Q.Cheng B.Q.Shi;L.Y.Zhao;X.L.Shang;B.H.Nie;D.C.Chen;C.Q.Li;Y.Q.Cheng

作者机构：School of Materials Science and Hydrogen EnergyFoshan UniversityFoshan 528000China School of Materials and EnergyGuangdong University of TechnologyGuangzhouGuangdong 510006China GD Midea Air-Conditioning Equipment Co.Ltd.Foshan 528311China Guangdong Key Laboratory of Hydrogen Energy TechnologyFoshan 528000China YunFu(Foshan)R&D Center of Hydrogen Energy StandardizationYunfu 527326China 

出 版 物：《Journal of Materials Science & Technology》 (材料科学技术（英文版）)

年 卷 期：2022年第111卷第16期

页      面：211-223页

核心收录：

学科分类：08[工学] 0806[工学-冶金工程] 0805[工学-材料科学与工程（可授工学、理学学位）] 080502[工学-材料学] 0802[工学-机械工程] 080201[工学-机械制造及其自动化] 

基　　金：financially supported by Basic and Applied Basic Research Fund of Guangdong Province of China(No.2019A1515110573) National Natural Science Foundation of China(No.51901047) Special Innovation Projects of Universities in Guangdong Province(2018KTSCX240) Key Project of Department of Education of Guangdong Province(No.2016GCZX008) Project of Engineering Research Center of Foshan(No.20172010018)。 

主　　题：Magnesium alloys Texture Plane anisotropy Stretch formability Rolled sheets 

摘      要：Obviously planar anisotropy due to‘TD split’orthotropic texture(TD indicates Transverse direction)always exist in the Rare-earth(RE)or Ca containing Mg alloy sheets,which is likely caused by the lowreduction rolling(and annealing)as revealed in our previous research.In this work,the as-cast billets of a ZWK100 alloy were subjected to final-pass heavy reduction rolling(FHRR)at 500°C with different reductions(30%-70%)after rough rolling,aiming to investigate the reduction effect on the microstructure and texture formation.The results show that FHRR with higher reductions above 50%is in favor of shear banding formation but has little effect on the as-deformed texture components,and the excellent formability with single-pass reduction up to 70%is mainly ascribed to the activation of prismatic slip.FHRR with reduction above 50%and annealing can generate uniform grain structures of~10μm and symmetrical‘oblique-line split’texture in(0001)pole figures,with basal poles tilting by about 50°from ND(Normal direction)towards some oblique-line of TD and RD(Rolling direction)as well as uniform distribution of counter lines as an annular shape,resulting in excellent elongation to failure of~50%and ultra-low planar anisotropyΔr_of~0.1 and high stretch formability(Erichsen value:8.1).The formation‘oblique-line split’texture in(0001)pole figures is mainly correlated with the preferred growth tendency of grains with■//RD,which was suggested to relate to the high mobility of some special boundaries such as 40°-45°■.The influences of starting textures on the mechanical properties,planar anisotropy and related deformation modes,as well as their correlations with the stretch formability were comparatively investigated with the‘TD split’orthotropic texture as a counterpoint.