Optimizing microstructure and mechanical properties of heat-treated Al-Zn-Mg-Cu alloy by indirect hot deformation technology

作     者：ZHANG Quan-da SUN Fu-zhen LIU Meng LIU Wen-cai 张泉达;孙福臻;刘萌;刘文才

作者机构：State Key Laboratory of Advanced Forming Technology and Equipment(China Academy of Machinery Science&Technology)Beijing 100044China School of Mechanical EngineeringUniversity of Science and Technology BeijingBeijing 100083China National Engineering Research Center of Light Alloy Net Forming and State Key Laboratory of Metal Matrix Composite(Shanghai Jiao Tong University)Shanghai 200240China 

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

年 卷 期：2022年第29卷第11期

页      面：3544-3556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：Project(SKL2020005)supported by the Open Fund of State Key Laboratory of Advanced Forming Technology and Equipment,China Project(206Z1803G)supported by Local Science and Technology Development Fund Guided by the Central Government of China 

主　　题：strain rate pre-deformation forming temperature AA7075 compound tensile 

摘      要：In this paper,the indirect thermal tensile experiments of 7075 aluminum alloy including the pre-deformation process at room temperature and the final heat tensile process were carried out,the plastic deformation behavior and forming limit of the material in the compound forming process were investigated considering three pre-deformation amounts 4%,9%,14%,two strain rates 0.001 s^(-1),0.01 s^(-1) and four forming temperatures 300℃,350℃,400℃,450℃.In the indirect hot forming process,the material is sensitive to the pre-deformation,strain rate,and forming temperature,when the strain rate is 0.01 s^(-1),the pre-deformation amount is 4%,and the forming temperature is 400℃,respectively,the maximum tensile deformation is 50 ***,taking the process in which the forming temperature is 450℃ as an example,according to the observation of the microstructure appearance of fracture,the fracture type in the hot forming process was judged as the ductile *** analyzing the microstructure of the specimen treated with the quenching and artificial aging process,the eutectic T(AlZnMgCu)phase and α(Al)matrix formed a network of non-equilibrium alpha binary eutectic.