Transactions of Materials and Heat Treatment

Title：Influence of non-isothermal dies on bending springback and residual stress for aluminum alloy 2024

Authors： Xia Liangjun Deng Lei Jin Junsong Wang Xinyun

Unit： Huazhong University of Science and Technology

KeyWords： aluminum alloy 2024 non-isothermal dies V-shaped bending springback residual stress

ClassificationCode：TG389

year,vol(issue):pagenumber：2016,41(9):92-95

Abstract：

The regulations of springback and residual stress in non-isothermal dies bending process of

aluminum alloy 2024 were researched. The V-shape bending tests were conducted that the blank

was set at 25 ℃(room temperature), and the punch and the die were set at 25 ℃, 200 ℃, 300

℃, 400 ℃ respectively. Then the isothermal bending of blank and die at 200 ℃ was conducted

to compare with the non-isothermal bending. The results show that the springback and residual

stress decrease when the punch and die temperatures rise. When the blank temperatures of non-

isothermal bending after processing before springback is close to that of isothermal bending,

the springback and the residual stress of inner and outer layers and their difference with

non-isothermal bending are close to the value with isothermal bending or even less due to the

temperature gradient during processing and the influence of the temperature rise after

hydroforming. By controlling the temperature of punch and die properly, the springback and

residual stress of blank with room temperature are as small as those of the high temperature

isothermal bending.

Funds：

国家自然科学基金资助项目（51205143）

夏良俊（1987-），男，硕士王新云（1973-），男，博士，教授

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