Effect of isothermal compression and subsequent heat treatment on grain structures evolution of Al-Mg-Si alloy

作     者：LI Ze-cheng DENG Yun-lai YUAN Man-fa ZHANG Jin GUO Xiao-bin 李泽程;邓运来;袁满发;张劲;郭晓斌

作者机构：Light Alloy Research InstituteCentral South UniversityChangsha 410083China State Key Laboratory of High Performance Complex ManufacturingCentral South UniversityChangsha 410083China School of Materials Science and EngineeringCentral South UniversityChangsha 410083China 

出 版 物：《Journal of Central South University》 (中南大学学报（英文版）)

年 卷 期：2021年第28卷第9期

页      面：2670-2686页

核心收录：

学科分类：0810[工学-信息与通信工程] 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] 0812[工学-计算机科学与技术（可授工学、理学学位）] 080201[工学-机械制造及其自动化] 

基　　金：Project(2016YFB0300901)supported by the National Key R&D Program of China Project(TC190H3ZV/2)supported by the National Building Project of Application Demonstration Platform on New Materials Products,China Project(15308469779)supported by Key Laboratory of National Science and Technology for Equipment Pre-research,China 

主　　题：Al-Mg-Si alloy Zener-Hollomon parameter dislocation recrystallization grain boundaries 

摘      要：The constitutive relationships of Al-Mg-Si alloy deformed at various strain rates,temperatures and strains were *** microstructure evolution was quantitatively characterized and analyzed,including recrystallization fraction,grain sizes,local misorientation,geometrically necessary dislocation and stored strain energy during hot deformation and subsequent heat *** results show that the dislocation density and energy storage are linear with ln Z during hot deformation and subsequent heat treatment,indicating continuous recrystallization occurring in both *** higher ln Z,the dislocation density declines more sharply during subsequent heat *** ln Z is less than 28,dislocation density becomes more stable with less reduction during subsequent heat treatment after hot *** these dislocations distribute along low angle grain boundaries,the subgrain has good stability during subsequent heat *** main recrystallization mechanism during hot deformation is continuous dynamic recrystallization,accompanied by geometric dynamic recrystallization at higher ln Z.