Transactions of Materials and Heat Treatment

Title：Influence of deformation and pre-aging on microstructure and properties for architectural aluminum profiles

Authors： Li Jianying Jiang Kui Luo Zhidong Zhang Zhisong

Unit： Changchun University of Architecture Jilin University Changchun North Movie Metropolis Film and Television Culture Industry Investment Co. Ltd.

KeyWords： 6061 aluminum alloy solid solution aging deformation pre-aging hardness mechanical properties corrosion resistance

ClassificationCode：TG146.1

year,vol(issue):pagenumber：2022,47(10):265-271

Abstract：

The influences of deformation and pre-aging on the microstructure, hardness, tensile properties and corrosion resistance of 6061 aluminum alloy profiles for construction were studied by means of metallographic microscope, tensile testing machine and electrochemical workstation. The results show that adding deformation and pre-aging between the traditional solution and aging (G+S) treatment processes can shorten the time of peak hardness appearance, and the hardness is improved to different degrees. Compared with 6061 aluminum alloy in G+S state, the tensile strength and yield strength of 6061 aluminum alloy in solid solution+30% deformation+aging (G+30% B+S), solid solution+60% deformation+aging (G+60% B +S) and solid solution+pre-aging+60% deformation+aging (G+YS+60% B+S) state are improved to varying degrees, and the elongation after fracture is decreased to varying degrees. The order of corrosion resistance from high to low is G+60% B+S > G+30% B+S>G+YS+60% B+S. Under the same aging time, the order of conductivity from small to large is G+60% B+S<G+30% B+S<G+YS+60% B+S<G+S. The deformation and pre-aging+deformation are helpful to improve the hardness and strength of 6061 aluminum alloy in G+S state, but the pre-aging reduces the corrosion resistance of 6061 aluminum alloy in G+60% B+S state.

Funds：

国家自然科学基金资助项目（50978168）；吉林省自然科学基金资助项目（20170101252JC）

李建英（1982-），女，硕士，副教授，E-mail：115363115@qq.com

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