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Affiliation of Author(s):机电学院

Journal:Zhongguo Youse Jinshu Xuebao

Abstract:Hot forming test with synchronous cooling, metallographic and TEM observation and tensile test were performed to investigate the influence of hot forming with synchronous cooling operations on the microstructure evolution and strengthening mechanism of AA2024-H18 aluminum alloy. The results show that, the yield strength of hot formed AA2024 sheet with 96 h natural aging is 4%, which is superior to that of traditionally formed sheet, and meanwhile, the tensile strength is increased by 12%. Based on the microstructure observation and analysis, the strengthening is generated by the increase of the dislocation density and precipitation of some fine acicular particles in form of Al2CuMg (S'). The main strengthening mechanism of AA2024 aluminum alloy underwent hot forming with synchronous cooling is the pinning effect of dispersoid phase Al20Cu2Mn3(T) and precipitated phase Al2CuMg (S') on dislocation as well as the interaction of dislocation. © 2017, Science Press. All right reserved.

ISSN No.:1004-0609

Translation or Not:no

Date of Publication:2017-07-01

Co-author:Chen, Guo-Liang,wangning,Sun, Jia-Wei

Correspondence Author:cmh