Suppressing abnormal grain growth and switching precipitation behaviors in ZK60 Mg profile by inducing pre-tension  

作　　者：Jianwei Tang Liang Chen Zhigang Li Biaohua Que Guoqun Zhao Cunsheng Zhang 

机构地区：[1]Key Laboratory for Liquid-Solid Structural Evolution and Processing of Materials(Ministry of Education),Shandong University,Jinan 250061,China

出　　处：《Journal of Materials Science & Technology》2023年第24期89-101,共13页材料科学技术（英文版）

基　　金：financially supported by the National Natural Science Foundation of China(Nos.51875317 and 52222510);the Key Research and Development Program of Shandong Province(No.2021ZLGX01).

摘　　要：The pre-tension was induced to suppress the abnormal grain growth(AGG)of ZK60 Mg profile during solution treatment.The effects of pre-tension on the microstructure evolution and mechanical properties were studied,and the suppressing mechanism was discussed.If the pre-tension strain was larger than 10%,AGG during solution could be effectively inhibited,resulting in a sharp decrease in the grain size.The suppression effects were realized by restricting the orientation dependent of AGG and promoting static recrystallization.The pre-tension reset the distributions of stored energy and sizes of the grains with〈11–20〉and〈10–10〉orientations,and thus retarded the orientation dependent of AGG.Moreover,the pre-tension introduced a mass of dislocations,twins,and stacking faults,all of which promoted the occurrence of static recrystallization,and the grain structure was further refined.The pre-tension accelerated the precipitation kinetics during aging,resulting in fine and dense precipitates.With the increase of pre-tension strain,the strength of ZK60 Mg profile monotonically increased.

关 键 词：Mg alloy Abnormal grain growth PRE-TENSION Microstructure Mechanical properties 

分 类 号：TG379[金属学及工艺—金属压力加工] TG146.22[一般工业技术—材料科学与工程]