Influence of the inicial porous preform shape on the deformed state evolution and force parameters of the forging process in a semi-closed die

Authors

  • G. Bagliuk Institute for Problems of Materials Science NAS of Ukraine, Ukraine https://orcid.org/0000-0002-2392-2687
  • S. Kyryliuk Institute for Problems of Materials Science NAS of Ukraine, Ukraine

DOI:

https://doi.org/10.20535/2521-1943.2020.88.198649

Keywords:

forging, porosity, deformation, stress-strain state, densification, forces, forged piece, flash

Abstract

Abstract. The results of simulation of hot forging process for porous powder preforms of two initial configurations (cylindrical shape and in the form of a cut cone) in a die with detachable matrix are presented. Numerical assessment of the effect of the boundary conditions of the deformation scheme on the evolution of the stress-strain state of the forged piece was performed using the model of rigidly plastic porous body. The evolution of the relative density distribution, the deformed state along the cross section of the workpiece at different stages of deformation and the overall effort of deforming the process were studied. The fundamentally different nature of the evolution of density distribution and components of deformation tensor in the forged pieces volume is shown in deformation of the preforms of different initial configuration, which is manifested in a substantially higher level of deformations intensity in the volume for the initial preforms, which are made in the form of a cut cone in a cut cylindrical shape. The maximum value of the forging force for the initial preforms of both configurations is practically the same, but the intensity of the deformation force increase is much higher for the cylindrical blanks.

Author Biography

G. Bagliuk, Institute for Problems of Materials Science NAS of Ukraine

Заступник директора з наукової роботи

References

  1. Dorofeev Yu. G. Promyshlennaya tekhnologiya goryachego pressovaniya poroshkovykh izdelii, [Industrial technology of hot pressing of powder products]. / Yu. G. Dorofeev, B. G. Gasanov, V. Yu. Dorofeev. – Moskva: Metallurgiya, 1990. – 206 s.
  2. Kun Kh. A. Osnovnye printsipy shtampovki poroshkovykh zagotovok, [Basic principles for stamping powder blanks]. / Kh. A. Kun. // M.: Metallurgiya. – 1977. – S. 143–158.
  3. Bai Q., Lin J., Jiang J., Dean T.A., Zou J., Tian G. A study of direct forging process for powder superalloys // Materials Science & Engineering A. – 2015. – Vol. 621. – P. 68–75.
  4. Hendrickson A. A. Impact forging of sintered steel preforms / A. A. Hendrickson, P. M. Machmeier, D. W. Smith. // Powder Metallurgy. – 2000. – С. 327–344.
  5. Qui J.W., Liu Y., Liu Y.B., Liu B., Wang B., Ryba E., Tang H.P. Microstructure and mechanical properties of titanium alloy connecting rod made by powder forging process // Materials and Design. – 2012. – Vol. 33. – P. 213–219.
  6. Narayanasamy R. Some features of hot forging of powder metallurgy sintered high strength 4% titanium carbide composite steel preforms under different stress state conditions / R. Narayanasamy, V. Senthilkumar, K. Padney. // Materials and Design.. – 2008. – С. 1380–1400.
  7. Baglyuk G. Densification and Shape Change of Porous Billets in Closed and Open Dies // Recent Developments in Computer Modeling of Powder Metallurgy Processes. –IOS Press. NATO Science Series, 2001. – P.163–168.
  8. Pavlov V. A. Vliyanie deformirovannogo sostoyaniya na uplotnenie poroshkovykh metallov pri goryachei shtampovke, [The influence of the deformed state on the compaction of powder metals during hot stamping]. / V. A. Pavlov, M. I. Nosenko. // Poroshkova metallurgiya. – 1992. – №2. – S. 8–12.
  9. Baglyuk G. A. Optimіzatsiya protsesіv formoutvorennya pri garyachomu shtampuvannі poristikh zagotovok, [Optimization of Formation Processes in Hot Stamping of Porous Billets]. / G. A. Baglyuk. // Naukovі notatki. Mіzhvuz. zbіrnik. – 2009. – №25. – S. 4–8.
  10. O nakhozhdenii optimal'noi formy poristoi zagotovki pri goryachei shtampovke, [On finding the optimal shape of a porous billet during hot stamping]. / Е. А.Дорошкевич, В. М. Горохов, И. Н. Рябов, Е. В. Звонарев. // Порошковая металлургия. – 1988. – №4. – С. 11–15.
  11. Baglyuk G. A. Vliyanie deformatsionnykh parametrov na strukturu i svoistva goryacheshtampovannykh poroshkovykh materialov, [Influence of deformation parameters on the structure and properties of hot stamped powder materials]. / G. A. Baglyuk // Obrabotka materialov davleniem / G. A. Baglyuk. – Kramators'k, 2011. – S. 139–145.
  12. Bagliuk G. The influence of severe plastic deformation on structure and properties of aluminum matrix composite / G. Bagliuk, Y. Shishkina. // Euro PM 2014 Congress Proceedings. – 2014. – С. 21–24.
  13. Dorofeev V. Yu. Mezhchastichnoe srashchivanie pri formirovanii poroshkovykh goryachedeformirovannykh materialov, [Interparticle splicing during the formation of hot–deformed powder materials]. / V. Yu. Dorofeev, S. N. Egorov. – M.: ZAO Metallurgizdat, 2003. – 152 s.
  14. Pavlov V. A. Vliyanie goryachei deformatsii na formirovanie struktury i svoistv poroshkovykh metallov, [The effect of hot deformation on the formation of the structure and properties of powder metals]. / V. A. Pavlov, M. I. Nosenko. // Poroshkovaya metallurgiya. – 1988. – №2. – S. 16–20.
  15. Semenov E. I. Goryachaya shtampovka, [Hot stamping] / E. I. Semenov // Kovka i shtampovka / E. I. Semenov. – M.: Mashinostroenie, 1986. – (Spravochnik; t. 2). – S. 592.
  16. Eduardov M. S. Shtampovka v zakrytykh shtampakh, [Stamping in closed stamps] / M. S. Eduardov. – L.: Mashinostroenie, 1971. – 240 s.
  17. Baglyuk G. A. Uplotnenie poristogo materiala pri goryachei shtampovke v zakrytom shtampe s kompensatorom, [Compaction of porous material during hot stamping in a closed die with a compensator] / G. A. Baglyuk. // Poroshkovaya metallurgiya. – 1998. – №4/5. – S. 14–18.
  18. Vliyanie skhemy deformatsii na strukturu i svoistva goryacheshtampovannykh alyumomatrichnykh kompozitov, [The influence of the deformation scheme on the structure and properties of hot–pressed aluminomatrix composites] / Yu. A.Shishkina, G. A. Baglyuk, V. S. Kurikhin, D. G. Verbilo. // Poroshkova metallurgiya. – 2016. – №1/2. – S. 9–17.
  19. Vliyanie rezhimov obrabotki na strukturu i svoistva goryacheshtampovannogo intermetallida Fe3Al, [The influence of processing modes on the structure and properties of the hot stamped Fe3Al intermetallic] / [G. A. Baglyuk, A. I. Tolochin, A. V. Tolochina ta іn.]. // Poroshkova metallurgiya. – 2016. – №5/6. – S. 59–69.
  20. Patent na korisnu model' № 25067 (Ukraїna). Shtamp dlya garyachogo shtampuvannya poroshkovikh zagotovok, [Stamp for hot stamping of powder bars] / Baglyuk G.A., Shtern M.B., Grabchak O.K., Serdyuk G.G.// Byul. № 11. – 25.07.2007.
  21. Shima S. Plasticity Theory for Porous Metals / S. Shima, M. Oyane. // International Journal of Mechanical Sciences. – 1976. – Vol. 18. – С. 285–291.
  22. Khoei A. R. Computational Plasticity in Powder Forming Processes / A. R. Khoei. // Elsevier Science. – 2005. – С. 449.

Published

2020-04-24

How to Cite

[1]
G. Bagliuk and S. Kyryliuk, “Influence of the inicial porous preform shape on the deformed state evolution and force parameters of the forging process in a semi-closed die”, Mech. Adv. Technol., no. 1(88), pp. 49–57, Apr. 2020.

Issue

Section

Mechanics