Transactions of Materials and Heat Treatment

Title：Influence of cold pressing with corrugated surface on residual stress for 7050 aluminum alloy thick plate with ribs

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ClassificationCode：TG166.3；TG115.22

year,vol(issue):pagenumber：2022,47(4):119-125

Abstract：

Through quenching test, cold pressing test and finite element simulation, the influence law of corrugated surface structure on residual stress reduction after quenching and cold pressing of 7050 aluminum alloy thick plate with ribs was studied, and the influences of deformation amount, corrugation direction and corrugation shape on the residual stress reduction effect after the cold pressing were analyzed. The results show that the corrugated surface structure has no obvious effect on the distribution of quenching residual stress, but the residual stress is greatly reduced after cold pressing. With the increasing of the deformation amount, the area and stress value of the compressive stress zone at the rib and edge positions on both sides of sample decrease, and the stress value at the trough position increases gradually. Significantly, due to the influence of the ribs on the metal flow, the corrugation in width direction is more conducive to the reduction of residual stress after cold pressing than the length direction. Finally, the residual stress reduction effect of corrugated corrugation is better than that of symmetrical corrugation, and the overall distribution is more uniform. Thus, when the cold pressing deformation amount is 3% and the corrugated corrugation structure is used in the width direction, a better residual stress reduction effect can be obtained of 7050 aluminum alloy thick plate with ribs.

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作者简介：李晨（1983-），女，硕士，高级工程师 E-mail：lichen_1983_2002@163.com 通信作者：袁武华（1973-），男，博士，教授 E-mail：yuan46302@163.com

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