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Han D.,Northwestern Polytechnical University | Yang H.,Northwestern Polytechnical University | Zhang L.-W.,Xian Aerospace Power Machinery Factory | Mou S.-Z.,Xian Aerospace Power Machinery Factory | And 2 more authors.
Guti Huojian Jishu/Journal of Solid Rocket Technology | Year: 2010

Based on analysis of microstructure and properties of 3A21 aluminium alloy, the effects of annealing temperature on properties and spinning technology of thin wall cylinder were studied under different reduction. The different mechanical properties and plasticity of workpiece were obtained through adjusting annealing temperature. The trials show that the residual stress of spinning can be properly eliminated and higher material strength gained at the low temperature annealing. Recrystallization annealing can refine grain and recover plasticity. The spinning process under too low forming temperature can not improve the plasticity, leading to defects and diameter growth, while the process under too high temperature can lead to grain growth, the pile-up of material can lead to defects. The corresponding material performance can be achieved through different heat treatment methods. Source


Han D.,Northwestern Polytechnical University | Yang H.,Northwestern Polytechnical University | Zhan M.,Northwestern Polytechnical University | Zhang L.-W.,Xian Aerospace Power Machinery Factory | And 2 more authors.
Suxing Gongcheng Xuebao/Journal of Plasticity Engineering | Year: 2011

The finite element mechanical model of conical nozzle spinning was set up with the boundary conditions being established. The results show the deformation mechanism of shear spinning and that the order of the three-dimensional stress state is Pr>Pz>Pt. The rational technologic parameters have been obtained through analyzing the distribution of equivalent stress, equivalent strain and wall thickness. The simulation results are verified by experimental test. Source

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