Сравнительный анализ структуры и свойств бескислородной меди после различных способов интенсивной пластической деформации

Translated title of the contribution: Comparative analysis of structure and properties of oxygen-free copper past different severe plastic deformation schemes

S. V. Dobatkin, G.A. Salischev, A.A. Kuznetsov, A.V. Reshetov, A.S. Synkov, T.N. Konkova

Research output: Contribution to journalArticle

Abstract

The structure and properties of oxygen-free copper (99.98%) were studied after different schemes of severe plastic deformation (SPD): equal-channel angular pressing (ECAP), multiaxial deformation (MD), twist extrusion (TE), and accumulative roll bonding (ARB) as a function of the strain at room temperature (to a true strain of 30−50). The SPD causes the formation of submicrocrystalline structure with a grain size of 200−250 nm and predominantly high angle boundaries (75−94%). ECAP leads to the formation of the most uniform structure. The strength characteristics increase with increasing the strain and reach the steady stage at ε ≈ 5. At the steady stage, σВ = = 460−480 MPa at ARB, MD, and TE, while at ECAP σВ = 430−440 MPa. The smallest «steady» values of δ = 4−5% were obtained in the case of ARB, and the maximum δ = 18% was obtained at MD and ECAP.
Translated title of the contributionComparative analysis of structure and properties of oxygen-free copper past different severe plastic deformation schemes
Original languageRussian
Pages (from-to)23-36
Number of pages14
JournalФИЗИКА И ТЕХНИКА ВЫСОКИХ ДАВЛЕНИЙ
Volume16
Issue number4
Publication statusPublished - 2006

Keywords

  • oxygen-free copper
  • plastic deformation
  • equal-channel angular pressing
  • multiaxial deformation
  • twist extrusion
  • accumulative roll bonding

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