Transactions of Materials and Heat Treatment

Title：Microstructure and mechanical property of aluminum alloy Al-Mg-Si under different deformation conditions

Authors： Guo Duanlu Huang Jianghua Lu Xin

Unit： China Academy of Machinery Science & Technology

KeyWords： aluminum alloy Al-Mg-Si cold deep drawing hot stretching hardness dynamic softening mechanism

ClassificationCode：TG304

year,vol(issue):pagenumber：2017,42(5):141-146

Abstract：

The deep drawing test of aluminum alloy 6014 at room temperature was carried out under different punch velocities, and its microstructure and mechanical property were studied in the deformation. Then, the hot stretching test for aluminum alloy 6016 was conducted, and its microstructure and mechanical property were studied at different temperatures with the same strain rate. The experimental results show that the drawing height increases with the increase of punch velocity (10-30 mm·min-1) for the former, while for the latter, the material hardness increases with the increase of stretching temperature （400-550 ℃）, and there is greater hardness value fluctuation along the stretching axis. However, the dynamic recrystallization process occurs obviously under the condition of stain rate of 1 s-1 and temperature of 500 ℃,and increasing temperature causes grain growth coarsening. Furthermore, there are a large number of (AlFeSi) crystalline phase in the two kinds of aluminum alloy of 6014 and 6016. Especially, it is more dispersion, uniform and concentrated near the grain boundary in the original microstructure for aluminum alloy 6016. Comparing the microstructures between the room temperature deep drawing aluminum alloy 6014 and the hot tension aluminum alloy 6016 room temperature, the former is more homogeneous, and the latter is of great diversity for grain size so as to decrease the material mechanical properties.

Funds：

国家科技重大专项“高档数控机床与基础制造装备”（2014ZX04002）

郭端路（1991-），男，硕士研究生陆辛（1957-），男，博士，研究员

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