Enhanced Electromagnetic Interference Shielding in a Duplex-Phase Mg-9Li-3Al-1Zn Alloy Processed by Accumulative Roll Bonding

作     者：Jiahao Wang Lin Xu Ruizhi Wu Jing Feng Jinghuai Zhang Legan Hou Milin Zhang Jiahao Wang;Lin Xu;Ruizhi Wu;Jing Feng;Jinghuai Zhang;Legan Hou;Milin Zhang

作者机构：Key Laboratory of Superlight Materials and Surface TechnologyMinistry of EducationHarbin Engineering UniversityHarbin 150001China College of ScienceHeihe UniversityHeihe 164300China 

出 版 物：《Acta Metallurgica Sinica(English Letters)》 (金属学报（英文版）)

年 卷 期：2020年第33卷第4期

页      面：490-499页

核心收录：

学科分类：08[工学] 0817[工学-化学工程与技术] 0806[工学-冶金工程] 0807[工学-动力工程及工程热物理] 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] 0703[理学-化学] 0811[工学-控制科学与工程] 

基　　金：This work was financially supported by the National Natural Science Foundation of China(Nos.51671063,51771060,51871068,51971071) the Domain Foundation of Equipment Advance Research of 13th Five-year Plan(No.61409220118) the Fundamental Research Funds for the Central Universities(No.HEUCFG201834) the Harbin City Application Technology Research and Development Project(No.2017RAQXJ032). 

主　　题：Accumulative roll bonding(ARB) Mg-Li alloy Dual-phase alloys Electromagnetic interference Reflection loss 

摘      要：High electromagnetic shielding performance was achieved in the Mg-9Li-3Al-1Zn alloy processed by accumulative roll bonding(ARB).The microstructure,electromagnetic interference shielding effectiveness(SE) in the frequency of 30-1500 MHz and mechanical properties of the alloy were investigated.A model based on the shielding of the electromagnetic plane wave was used to theoretically discuss the EMI shielding mechanisms of ARB-processed alloy.Results indicate that the SE of the material increases gradually with the increase in the ARB pass.The enhanced SE can be attributed to the obvious microstructure orientation caused by ARB,and the alternative arrangement of alpha(Mg) phase and beta(Li)phase.In addition,with the increase in ARB pass,the number of interfaces between layers increases and the grain orientation of each layer tends to alignment along c-axis,which is beneficial to the reflection loss and multiple reflection loss of the incident electromagnetic wave.