Effect of cross rolling on the microstructure and mechanical performance of a dual-phase structured Mg-8Li-6Zn-1Y(in wt.%)alloy

作     者：Dongliang Wang Daokui Xu Baojie Wang Changjian Yan Shuo Wang Xiangbo Xu Lan Zhang Cuilan Lu 

作者机构：Key Laboratory of Nuclear Materials and Safety AssessmentInstitute of Metal ResearchChinese Academy of SciencesShenyang 110016China School of Materials Science and EngineeringUniversity of Science and Technology of ChinaShenyang 110016China Binzhou Institute of TechnologyBinzhou 256606China Shandong Key Laboratory of Advanced Aluminium Materials and TechnologyBinzhou 256606China School of Environmental and Chemical EngineeringShenyang Ligong UniversityShenyang 110159China Institute of Corrosion Science and TechnologyGuangzhou 510070China Key Lab of Electromagnetic Processing of MaterialsMinistry of EducationNortheastern UniversityShenyang 110819China 

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

年 卷 期：2024年第176卷第9期

页      面：132-144页

核心收录：

学科分类：08[工学] 080502[工学-材料学] 0805[工学-材料科学与工程（可授工学、理学学位）] 

基　　金：supported by the National Natural Science Foundation of China Projects under Grant(Nos.52071220,U21A2049,51871211,51701129,and 51971054) China Postdoctoral Science Foundation(No.2023M733572) Liaoning Province’s project of“Revitalizing Liaoning Talents”(No.XLYC1907062) the Doctor Startup Fund of Natural Science Foundation Program of Liaoning Province(No.2019-BS-200) High level achievement construction project of Shenyang Ligong University(No.SYLUXM202105) Liaoning BaiQianWan Talents Program,the Domain Foundation of Equipment Advance Research of 13th Five-year Plan(No.61409220118) National Key Research and Development Program of China under Grant(Nos.2017YFB0702001 and 2016YFB0301105) the Innovation Fund of Institute of Metal Research(IMR),Chinese Academy of Sciences(CAS),the National Basic Research Program of China(973 Program)project under Grant No.2013CB632205 the Fundamental Research Fund for the Central Universities under Grant(No.N2009006) Bintech-IMR R&D Program(No.GYY-JSBU-2022–009) 

主　　题：Magnesium-lithium alloy Cross-rolling I-phase Microstructure Mechanical performance 

摘      要：The microstructure and mechanical performance of the unidirectionally and cross-directionally rolled Mg-8Li-6Zn-1Y(in wt.%)sheets have been investigated and *** reveals that after the unidirectional rolling(UR),the broken I-phase particles are aggregated at theα-Mg/β-Li phase ***,the cross-rolling(CR)process can not only severely break the bulk I-phase,but also cause the obviously uniform distribution of I-phase particles in the matrix ***,the average grain size of the CR samples is 3.61μm and about 50%that of the UR *** maximum texture intensities ofα-Mg andβ-Li phases in the CR samples are slightly stronger than those in the UR *** results demonstrate that the CR process can effectively enhance the tensile properties and remarkably reduce the mechanical anisotropy of the *** the UR samples,the yield strength,ultimate tensile strength,and elongation ratio along the rolling direction(RD)are 164 MPa,198 MPa,and 16.4%,whereas those along the transverse direction(TD)are 157 MPa,185 MPa,and 22.0%,*** the CR samples,their mechanical properties are basically the same and the mechanical anisotropy is almost *** yield strength,ultimate tensile strength,and elongation ratio along the cross-rolling direction 1(CRD1)and 2(CRD2)are respectively measured to be 181 MPa and 182 MPa,220 MPa and 218 MPa,20.6%and 20.7%.Failure analysis indicates that for the UR samples being tensile tested along the RD and TD,microcracks are preferentially initiated in the region of aggregated I-phase *** the CR samples being tensile tested along both two cross-rolling directions,the initiation of micro-cracks mainly occurs at the I-phase/matrix phase interfaces and in the interior of matrix phases.