Enhancing strength and ductility in back extruded WE71 magnesium alloy cylindrical parts by introduction of multi-direction forging process

作     者：Dehao Bu Ting Li Xiaolei Han Zhiwei Du Jiawei Yuan Kui Zhang Yongjun Li Yonggang Peng Zheng Pang Chunlei Zhao Dehao Bu;Ting Li;Xiaolei Han;Zhiwei Du;Jiawei Yuan;Kui Zhang;Yongjun Li;Yonggang Peng;Zheng Pang;Chunlei Zhao

作者机构：National Center of Analysis and Testing for Nonferrous Metals and Electronic MaterialsGRINM Group Co.Ltd.Beijing 100088China Guobiao(Beijing)Testing&Certification Co.Ltd.China United Test&Certification Co.Ltd.Beijing 100088China General Research Institute for Nonferrous MetalsBeijing 100088China State Key Laboratory for Fabrication and Processing of Non-Ferrous MetalsGRIMAT Engineering Institute Co.Ltd.Beijing 101407China Gaona Aero Material Co.Ltd.Beijing 100081China 

出 版 物：《Journal of Rare Earths》 (稀土学报（英文版）)

年 卷 期：2023年第41卷第3期

页      面：462-470,I0006页

核心收录：

学科分类：080503[工学-材料加工工程] 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）] 0802[工学-机械工程] 080201[工学-机械制造及其自动化] 

基　　金：Project supported by the General Program of National Natural Science Foundation of China(51871195 51501015) 

主　　题：WE71 magnesium alloy Multi-direction forging Backward extrusion Bimodal grain structure Rare earths 

摘      要：Magnesium cylindrical parts have relatively poor mechanical properties and distinct anisotropy of microstructure,which hinder their application as structural *** improve the performance of WE71 cylindrical parts,multi-direction forging(MDF)was introduced before back extrusion,and the microstructure and mechanical properties were *** of microstructure show that the grain size in the outer of the cylindrical bottom is refined from 30.1 to 27.7μm,the micro structure is more uniform and the dislocation density is *** bimodal grain structure is formed in the outer of the cylindrical wall,which is ascribed to the formation of MgsRE phases along grain *** phases result in the Zener pinning effect on grain boundaries and the reduction of DRX volume *** texture type of the cylindrical bottom is‖ED and the cylindrical wall is‖ED,and the maximum pole intensity is 1.986 and 1.664,*** of the tensile test at room temperature show that combined improved strength and ductility of the cylindrical part is attained after introducing the MDF *** ultimate tensile strength(UTS),yield strength(YS)and elongation are279 MPa,185 MPa and 12%at the bottom and 299 MPa,212 MPa and 20%at the wall.