Transactions of Materials and Heat Treatment

Title：Influences of upsetting reduction on microstructure and property anisotropy for Al-Zn-Mg-Cu aluminum alloy forgings

Authors： Peng Zhenling Huang Lanping Wang Huiping Ma Yunlong Chen Songyi Jiao Huibin Yang Zhen1 Chen Kanghua

Unit： Central South University Beijing Institute of Astronautical Systems Engineering

KeyWords： aluminum alloy multiaxial free forging upsetting reduction mechanical properties corrosion resistance property anisotropy

ClassificationCode：TG316.2

year,vol(issue):pagenumber：2018,43(10):13-22

Abstract：

In order to produce ultrahigh strength aluminum alloy forgings with high comprehensive properties, the influences of the ultimate upsetting reduction on microstructure and property anisotropy of AlZnMgCu aluminum alloy forgings were studied by hardness, electrical conductivity, mechanical tensile and exfoliation corrosion tests combining with various microstructure observation methods such as OM and SEM. The results show that with the increasing of the ultimate upsetting reduction, the comprehensive mechanical properties are basically unchanged, and the anisotropy is first reduced and then increased. However, the corrosion resistance property is decreased, and the anisotropy is increased. When the amount of the ultimate upsetting reduction is 20%-40%, the strength, elongation and corrosion resistance property of forgings are the least, and its comprehensive performance is optimal. Furthermore, the change in the grain shape and size and the change in the second phase distribution caused by the ultimate upsetting reduction are the main causes of this phenomenon.

Funds：

国家重点研发计划（2016YFB0300801）；国家自然科学基金重大科研仪器设备研制专项（51327902）

彭振凌（1993-），男，硕士研究生，E-mail：pengzhenling@csu.edu.cn；通讯作者：黄兰萍（1973-），女，博士，副教授，博士生导师，E-mail: christie@mail.csu.edu.cn

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