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Simulation of Two-Stage Hot Forging of Porous Workpieces Involving Severe Plastic Deformation

  • THEORY AND TECHNOLOGY OF FORMING PROCESSES
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Powder Metallurgy and Metal Ceramics Aims and scope

The evolution of the stress-strain state and the relative density distribution throughout a porous workpiece in the two-stage hot forging process was studied. The primary stage involved hot deformation of a cylindrical preform with the application of force to its lateral surface to form an intermediate semi-finished product with a cross-section shaped as a truncated cone. Further deformation in the secondary stage involved hot forging of the conical workpiece into a prism. These process stages were simulated using the finite-element method with the DEFORM 2D/3D software package. The starting preform was a cylinder with uniformly distributed porosity throughout the volume. The simulation results revealed significant uneven strains εi across the workpiece following the primary process stage, leading to an area with increased strains εi concentrated near the upper punch. Conversely, the secondary process stage noticeably evened out the strain values across the forged workpiece. This occurred because the severe deformation area in the secondary process stage matched the stagnant area in the primary stage. The proposed two-stage deformation pattern achieved sufficiently high strains (1.3–1.7), allowing the production of forged materials with excellent mechanical properties.

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Authors and Affiliations

  1. Frantsevich Institute for Problems of Materials Science, National Academy of Sciences of Ukraine, Kyiv, Ukraine

    G. A. Bagliuk, S. F. Kyryliuk & N. K. Zlochevska

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  1. G. A. Bagliuk
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  2. S. F. Kyryliuk
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  3. N. K. Zlochevska
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Correspondence to G. A. Bagliuk.

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Translated from Poroshkova Metallurgiya, Vol. 62, Nos. 7–8 (552), pp. 57–67, 2023.

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Bagliuk, G.A., Kyryliuk, S.F. & Zlochevska, N.K. Simulation of Two-Stage Hot Forging of Porous Workpieces Involving Severe Plastic Deformation. Powder Metall Met Ceram 62, 427–435 (2023). https://doi.org/10.1007/s11106-024-00404-w

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  • DOI: https://doi.org/10.1007/s11106-024-00404-w

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