Effect of Initial Microstructure Prior to Extrusion on the Microstructure and Mechanical Properties of Extruded AZ80 Alloy with a Low Temperature and a Low Ratio

作     者：Hang Zhang Haipeng Li Rongguang Li Boshu Liu Ruizhi Wu Dongyue Zhao Shanshan Li Hang Zhang;Haipeng Li;Rongguang Li;Boshu Liu;Ruizhi Wu;Dongyue Zhao;Shanshan Li

作者机构：School of Mechanical and Power EngineeringShenyang University of Chemical TechnologyShenyang 110142China Key Laboratory of Superlight Materials&Surface TechnologyMinistry of EducationHarbin Engineering UniversityHarbin 150001China 

出 版 物：《Chinese Journal of Mechanical Engineering》 (中国机械工程学报（英文版）)

年 卷 期：2023年第36卷第3期

页      面：339-349页

核心收录：

学科分类：0806[工学-冶金工程] 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）] 

基　　金：Supported by National Natural Science Foundation of China(Grant Nos.52171121,51971151,52201131 and 52201132) Liaoning Provincial Xingliao Program of China(Grant No.XLYC1907083) Liaoning Provincial Natural Science Foundation of China(Grant No.2022-NLTS-18-01) Open Foundation of Key Laboratory of Superlight Materials and Surface Technology of Ministry of Education of China(Grant No.HEU10202205) 

主　　题：Magnesium alloy Low temperature and low ratio extrusion Bimodal grain structure Dynamic precipitate Dynamic recrystallization 

摘      要：Magnesium(Mg)alloys are the lightest metal structural material for engineering applications and therefore have a wide market of ***,compared to steel and aluminum alloys,Mg alloys have lower mechanical properties,which greatly limits their *** is one of the most important processing methods for Mg and its ***,the effect of such a heterogeneous microstructure achieved at low temperatures on the mechanical properties is lacking *** this work,commercial AZ80 alloys with different initial microstructures(as-cast and as-homogenized)were selected and extruded at a low extrusion temperature of 220℃and a low extrusion ratio of *** microstructure and mechanical properties of the two extruded AZ80 alloys were *** results show that homogenized-extruded(HE)sample exhibits higher strength than the cast-extruded(CE)sample,which is mainly attributed to the high number density of fine dynamic precipitates and the high fraction of recrystallized ultrafine *** to the coarse compounds existing in CE sample,the fine dynamical precipitates of Mg17(Al,Zn)12form in the HE sample can effectively promote the dynamical recrystallization during extrusion,while they exhibit a similar effect on the size and orientation of the recrystallized *** results can facilitate the designing of high-strength wrought magnesium alloys by rational microstructure construction.