Transactions of Materials and Heat Treatment

Title：Experimental research on aluminum alloy 7B04 under pre-plastic deformation in creep age forming

Authors： Lv Fenggong Huang Xia Zeng Yuansong Wang Mingtao

Unit： Beijing Aeronautical Manufacturing Technology Research Institute Aeronautical Key Laboratory for Plastic Forming Technologies Beijing Key Laboratory of Digital Plasticity Forming and Equipment

KeyWords： aluminum alloy 7B04 buckling analysis pre-plastic deformation creep age forming

ClassificationCode：TG306

year,vol(issue):pagenumber：2016,41(5):126-130

Abstract：

To obtain the buckling critical load at room temperature, eigenvalue buckling analysis for aluminum alloy 7B04-T651 stiffened structure part was performed by finite element method (FEM). Creep age forming (CAF) experiments within the critical load range were carried out at 160 ℃/20 h under different bending radii, and the influences of pre-plastic deformation on component configuration and mechanical performance at room temperature were analyzed. The results show that pre-plastic deformation can significantly reduce the springback rate, but large plastic strain causes the stiffener buckling during CAF. The strength of formed components is close to that of the artificial aging condition at 160 ℃/20 h, and it has a downward tendency with the increase of pre-plastic deformation. The strength of stiffener is slightly higher than that of skin on the same specimen. The elongation and elastic modulus show little change as a whole.

Funds：

国家自然科学基金资助项目(50975267)

吕凤工（1988-），男，硕士，工程师曾元松（1971-），男，博士，研究员，博士生导师

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