Microstructure evolution and corrosion resistance of AZ31 magnesium alloy tube by stagger spinning  

作　　者：Fanlin Zheng Hongsheng Chen Yuanqi Zhang Wenxian Wang Huihui Nie 

机构地区：[1]College of Mechanical and Vehicle Engineering,Taiyuan University of Technology,Taiyuan 030024,China [2]Shanxi Key Laboratory of Advanced Magnesium-Based Materials,Taiyuan 030024,China [3]College of Materials Science and Engineering,Taiyuan University of Technology,Taiyuan 030024,China

出　　处：《International Journal of Minerals,Metallurgy and Materials》2022年第7期1361-1372,共12页矿物冶金与材料学报（英文版）

基　　金：supported by the National Natural Science Foundation of China (Nos. 51805358 and 51775366);Key Research and Development Program of Jinzhong (No. Y201023);College Students’ Innovative Entrepreneurial Training Plan Program (No. 202010112011)

摘　　要：This study fabricates an AZ31 magnesium alloy tube by spinning technology-power stagger forward spinning.The microstructure evolution of the tube is investigated by combining electron backscatter diffraction and transmission electron microscopy analysis,and the corrosion resistance is measured by an electrochemical corrosion test.Results show that the grains are obviously more uniform and finer along the wall thickness’s direction of the AZ31 alloy tube after the third spinning pass.The number of twins ascends first and then descends,while the varying trend of low-angle grain boundaries(LAGBs)is opposite to that of the twins as the spinning pass increases.With the increase of the total spinning deformation,the deformation texture initially increases and the c-axis of the{0001}crystal plane gradually rotates to the axial direction of the tube;the deformation texture then decreases and the orientation of grains becomes more random.The main mechanism of grain refinement is dynamic recrystallization by the twin-induced way and bowing out of the nucleation at grain boundaries during the first and second pass.However,the dominant mechanism of the refined grain is the high-temperature dynamic recovery in the third pass,and the microstructure mainly consists of substructured grains.After the spinning deformation,the corrosion resistance of the AZ31 alloy tube decreases due to the combined effect of twins and high density-dislocations.

关 键 词：AZ31 magnesium alloy power stagger forward spinning microstructure evolution corrosion resistance 

分 类 号：TG146.22[一般工业技术—材料科学与工程]