Hot compression behavior and microstructure analysis of as-rolled 6082-T6 aluminum alloy

doi:10.13251/j.issn.0254-6051.2022.02.005

Abstract

Abstract: Hot compression test of the as-rolled 6082-T6 aluminum alloy was carried out by using a thermal simulator. The flow stress of the alloy was analyzed under the condition of deformation temperature of 100-400 ℃ and strain rate of 0.01 s^-1, and the microstructure at different hot deformation temperatures was characterized. The results show that the mechanical properties of the as-rolled 6082 aluminum alloy are affected by deformation temperature and rolling direction. The stress of the alloy shows negative temperature sensitivity during deformation, that is, the higher the deformation temperature, the lower the stress. The alloy shows obvious anisotropy of mechanical properties. The compressive strength is higher at 0° and 90° to the rolling direction and lower at 45°. After hot compression deformation, the grain structure of the as-rolled 6082-T6 aluminum alloy in three directions is distorted along the direction of shear force, and the effect of deformation temperature on grain structure is slight. With the increase of deformation temperature, the dislocation density in the alloy matrix decreases obviously, and coarsening of the precipitates is observed.

Key words: 6082-T6 aluminum alloy, hot compression, mechanical properties, microstructure

CLC Number:

TG146.2

Ye Tuo, He Yubing, He Wenpeng, Liu Wei, Yuan Haodeng, Wu Yuanzhi, Liu Wei, Liu Jizhao. Hot compression behavior and microstructure analysis of as-rolled 6082-T6 aluminum alloy[J]. Heat Treatment of Metals, 2022, 47(2): 26-30.

References

[1]Kohar C P, Zhumagulov A, Brahme A, et al. Development of high crush efficient, extrudable aluminium front rails for vehicle lightweighting[J]. International Journal of Impact Engineering, 2016, 95: 17-34.
[2]Sun X, Meng F, Liu J, et al. Life cycle energy use and greenhouse gas emission of lightweight vehicle-A body-in-white design[J]. Journal of Cleaner Production, 2019, 220: 1-8.
[3]杨正斌, 李艳, 黄喆辉, 等. 冷轧变形量对Al-Mg-Si合金织构的影响[J]. 金属热处理, 2020, 45(3): 122-127.
Yang Zhengbin, Li Yan, Huang Zhehui, et al. Effect of cold rolling deformation on texture of Al-Mg-Si aluminum alloy[J]. Heat Treatment of Metals, 2020, 45(3): 122-127.
[4]Verma S, Misra J P. Study on temperature distribution during friction stir welding of 6082 aluminum alloy[J]. Materials Today: Proceedings, 2017, 4(2): 1350-1356.
[5]Kumar N, Rao P N, Jayaganthan R, et al. Effect of cryorolling and annealing on recovery, recrystallisation, grain growth and their influence on mechanical and corrosion behaviour of 6082 Al alloy[J]. Materials Chemistry and Physics, 2015, 165: 177-187.
[6]Bayat N, Carlberg T, Cieslar M. In-situ study of phase transformations during homogenization of 6005 and 6082 Al alloys[J]. Journal of Alloys and Compounds, 2017, 725: 504-509.
[7]Shang B C, Yin Z M, Wang G, et al. Investigation of quench sensitivity and transformation kinetics during isothermal treatment in 6082 aluminum alloy[J]. Materials and Design, 2011, 32(7): 3818-3822.
[8]Kai X, Chen C, Sun X, et al. Hot deformation behavior and optimization of processing parameters of a typical high-strength Al-Mg-Si alloy[J]. Materials and Design, 2016, 90: 1151-1158.
[9]Zhang P, Song A, Fang Y, et al. A study on the dynamic mechanical behavior and microtexture of 6082 aluminum alloy under different direction[J]. Vacuum, 2020, 173: 109119.
[10]王家毅, 米振莉, 李辉, 等. 基于热加工图6082铝合金锻造工艺优化及强化机制研究[J]. 稀有金属, 2019, 43(2): 113-121.
Wang Jiayi, Mi Zhenli, Li Hui, et al. Isothermal forging process and strengthening mechanism of 6082 aluminum alloy through processing map[J]. Rare Metals, 2019, 43(2): 113-121.
[11]邓鹏, 孙红亮, 陈志元, 等. T5态7N01铝合金挤压型材的组织及拉伸性能各向异性[J]. 金属热处理, 2020, 45(3): 7-10.
Deng Peng, Sun Hongliang, Chen Zhiyuan, et al. Microstructure and anisotropy tensile properties of T5 state 7N01 aluminum alloy extruded profile[J]. Heat Treatment of Metals, 2020, 45(3): 7-10.
[12]李旺珍, 孙有平, 何江美, 等. Al-Cu-Mg-Sc合金组织与性能的各向异性[J]. 金属热处理, 2020, 45(6): 119-123.
Li Wangzhen, Sun Youping, He Jiangmei, et al. Anisotropy of microstructure and properties of Al-Cu-Mg-Sc alloy[J]. Heat Treatment of Metals, 2020, 45(6): 119-123.
[13]王冠, 田昌龄, 寇琳媛, 等. 6063铝合金双道次热变形微观组织演变[J]. 金属热处理, 2020, 45(5): 23-28.
Wang Guan, Tian Changling, Kou Linyuan, et al. Microstructure evolution of 6063 aluminum alloy during double-pass hot deformation[J]. Heat Treatment of Metals, 2020, 45(5): 23-28.
[14]Qian F, Zhao D, Mørtsell E A, et al. Enhanced nucleation and precipitation hardening in Al-Mg-Si (-Cu) alloys with minor Cd additions[J]. Materials Science and Engineering: A, 2020, 792: 139698.
[15]Yang Q, Dong Y, Zhang Z, et al. Flow behavior and microstructure evolution of 6A82 aluminium alloy with high copper content during hot compression deformation at elevated temperatures[J]. Transactions of Nonferrous Metals Society of China, 2016, 26(3): 649-657.
[16]Zhang H, Li L, Yuan D, et al. Hot deformation behavior of the new Al-Mg-Si-Cu aluminum alloy during compression at elevated temperatures[J]. Materials Characterization, 2007, 58(2): 168-173.