The evolution of microstructure and texture of AZ80 Mg alloy cup-shaped pieces processed by rotating backward extrusion

作     者：Xin Che Qiang Wang Beibei Dong Mu Meng Zhi Gao Kai Liu Jin Ma Fulai Yang Zhiming Zhang 

作者机构：College of Materials Science and EngineeringNorth University of China3 Xueyuan RoadTaiyuan 030051PR China 

出 版 物：《Journal of Magnesium and Alloys》 (镁合金学报（英文）)

年 卷 期：2021年第9卷第5期

页      面：1694-1708页

核心收录：

学科分类：080503[工学-材料加工工程] 0806[工学-冶金工程] 08[工学] 0805[工学-材料科学与工程（可授工学、理学学位）] 080502[工学-材料学] 0703[理学-化学] 0802[工学-机械工程] 0801[工学-力学（可授工学、理学学位）] 080201[工学-机械制造及其自动化] 

基　　金：financially supported by the National Natural Science Foundation of China(No.51775520) the National Key Research and Development Program(No.2016YFB0301103-3) the Key R&D program of Shanxi Province(International Cooperation)(No.201903D421036) the Scientific and Technological Innovation Programs of Higher Education Institutions in Shanxi(No.2018002) 

主　　题：Rotating backward extrusion AZ80 magnesium alloy Dynamic recrystallizaton Texture 

摘      要：This study proposed an effective plastic deformation technique,rotating backward extrusion(RBE),for producing high performance AZ80 magnesium alloy cup-shaped *** RBE process was carried on the Gleeble-3500 test machine at 653 K,and the conventional backward extrusion(CBE)was also conducted for comparison.A detailed microstructure analysis was performed using the optical microscopy(OM)and electron back-scatter diffraction(EBSD).The results shown that the equivalent strain and deformation uniformity of the cup pieces could be substantially increased by the RBE process compared with the CBE ***,the RBE process could significantly improve the grain refining capacity and the proportion of dynamic recrystallization(DRX),of which the maximum reduction of grain size was 88.60%,and the maximum increase of DRX proportion was 55.30%in the cup *** main deformation mechanism of the RBE process was the discontinuous DRX(DDRX),while the continuous DRX(CDRX)was also occurred in the cup *** with the CBE sample,the texture of the cup bottom was weakened for the RBE *** microhardness value of the RBE sample was higher than that of the CBE sample,which can be attributed to the grain refinement strengthening.