Transactions of Materials and Heat Treatment

Title：Analysis on mechanical properties and microstructure evolution of 6061 aluminum alloy for vehicles in three-stage rolling process

Authors： Wei Yutang Cai Jianjun

Unit： Hebei University of Science and Technology

KeyWords： aluminum alloy rolling mechanical properties microstructural evolution aging treatment

ClassificationCode：TG146.2

year,vol(issue):pagenumber：2019,44(6):173-177

Abstract：

The 6061 aluminum alloy was machined by three-stage rolling processing method, and tested and analyzed by the test methods of structure and mechanical properties. The results show that the recrystallization of T6 aluminum alloy occurs after the solid solution and hot rolled treatment, and the samples are transformed into fibrous structures after room-temperature deformation treatment. Then, the dislocation density of 6061 aluminum alloy samples with aging 6 h reaches the maximum, and the dislocation density of aluminum alloy begins to decrease when the aging time increases. Furthermore, a large number of precipitated phase η′ precipitates out from the alloy matrix after aging treatment for 6 h. With the increasing of aging time, aluminum alloy generates some thick precipitated phase η′, and the density of phase η′ decreases from the TEM image. The mechanical properties of 6 h aging sample reaches the highest level. When the aging time increases, the elongation first increases and then decreases. The corrosion depth of T6 aluminum alloy sample reaches 80.2 μm. When the aging time increases, the aluminum alloy sample has better corrosion resistance.

Funds：

河北省自然科学基金资助项目（E2016202008）

韦玉堂（1964-），男，硕士，副教授 E-mail：wujuanbo831109@126.com

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