Transactions of Materials and Heat Treatment

Title：Influence of deformation aging on microstructure and mechanical properties of 6061 aluminum alloy plate

Authors： Tang Jianjiang Wang Jia Liu Jiale Lyu Qi Yu Fangli Li Tianqi Zhang Haihong

Unit： Xi′an Aeronautical University

KeyWords： 6061aluminum alloy deformation aging hardness tensile strength elongation

ClassificationCode：TG335

year,vol(issue):pagenumber：2019,44(7):165-169

Abstract：

The microstructure, hardness, tensile strength and elongation of rolling plate for 6061 aluminum alloy were compared and analyzed by studying the deformation and aging process. The results indicate that before and after aging, the microstructure of 6061 aluminum alloy is fibrous mainly composed of Al matrix phase and Mg2Si strengthening phase. With the increasing of aging temperature, the Mg2Si strengthening phase gradually precipitates and grows up between the fibrous structures, while the grain size is the largest under 190 ℃/1 h aging process. Furthermore, there is work hardening in the 6061 aluminum alloy before aging, and the hardness, tensile strength and elongation of alloy are 66.8 HV, 234 MPa and 12%, respectively. The deformation aging increases the plasticity of alloy, and the mechanical properties of alloy increase first and then decrease with the increasing of aging temperature. Under 180 ℃/1 h aging process, the hardness, tensile strength and elongation of 6061 aluminum alloy reaches the peak values of 66.4 HV, 279 MPa and 16.8%, respectively.

Funds：

陕西省教育厅科学研究项目（18JK0409）；西安航空学院校级科研基金项目（2017KY0102）

唐健江（1984-），男，博士，工程师，E-mail：Tangjianjiang@xaau.edu.cn

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