Abstract— The deformation flow behavior of 2A14 aluminum alloys during multi-directional forging (MDF) under various cumulative strains (∑Δɛ) has been investigated by combining experiment with finite element method (FEM). The forging process has been performed at 450oC with a deformation speed of 0.15 mms-1 and a pass strain (Δɛ) of 0.4. Numerical simulations of MDF using a commercial software (DEFORM-3D), have shown that the vortex, cross-flow and fold defect of flow lines of the forgings do not occur during deformation, and the degree of bent and inhomogeneity of flow lines also increase steadily with ∑Δɛ increases. The FEM analysis coincides well with experimental results. The effective strain in various areas of the forgings has been significantly enhanced during MDF. The dynamic recovery is dominant during deformation. The proportion of recrystallized grains and the degree of fragmentation of second phases in various areas of the annealed forgings increase with the increase of effective strain.
Keywords— 2A14 aluminum alloy, Multi-directional forging, Flow behavior, Effective strain, DEFORM-3D.
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