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New technology of plastic flow machining of thin plate

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Document pages: 8 pages

Abstract: Recently, a new severe plastic deformation (SPD) process called plastic flow machining (PFM) was proposed to produce thin plates with gradient structure. In this paper, the effect of sheet thickness () on the properties of commercial pure aluminum (al1050) processed by PFM was studied, and the effect of die geometry was studied. The experimental results show that   mm is increased in the range of 0.65 to 1.5, and the forming efficiency is improved. The microstructure of the produced plate shows gradient structure, and the average grain size varies from 0.8 to 3.81   the thickness of the whole plate is µ M. Both experiments and finite element (FE) simulations show that the gradient degree in the microstructure becomes more significant when the temperature increasesreased. Sheets produced by PFM exhibited a better strength-ductility balance than sheets obtained in other SPD processes. Tensile strength of 160–175 MPa and total ductility of 18–25 were obtained for the processed samples after PFM. A rise of from 0.65 to 1.5 mm lowered the strength but enhanced the ductility of the produced sheet, which is due to the coarser microstructure at larger values of .

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