Transactions of Materials and Heat Treatment

Title：Elongation and bulging limit of 5083 aluminum alloy sheet under different temperatures

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ClassificationCode：TG146.2+1

year,vol(issue):pagenumber：2019,44(4):151-156

Abstract：

The elongation changing rule of 5083 aluminum alloy sheet was obtained by uniaxial tensile experiment at different deformation temperatures and deformation rates，and the maximum elongation is 131% at the deformation rate of 1 mm·min-1 and the deformation temperature of 350 ℃. Then, the warm forming experiments of 5083 aluminum alloy sheet at different temperatures were simulated by software Dynaform, and the experimental verification was conducted by the self-designed warm forming device. Furthermore, the forming limit diagrams（FLD） of numerical simulation and physical experiment were obtained at different temperatures. By contrast, it is found that the bulging limit of 5083 aluminum alloy sheet increases with the increasing of temperature, and the forming limit of material is highest at 300 ℃. Finally, the warm deep drawing rupture experiments of 5083 aluminum alloy sheet at different temperatures were simulated, and the experimental verification was conducted by the warm forming device of aluminum alloy sheet to obtain the limit drawing diameter of sheet at different temperatures. Furthermore, the limit drawing coefficient at different temperatures were calculated. The results show that the limit drawing coefficient shows a high-low-high changing rule with the increasing of temperature, and the optimum temperature of warm forming for 5083 aluminum alloy sheet is 250 ℃.

Funds：

国家自然科学基金资助项目（51375521）

吕琳（1968-），女，硕士，教授 E-mail：lulin@cqut.edu.cn 通讯作者：邓明（1960-），男，硕士，教授 E-mail：dm@cqut.edu.cn

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