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 contribution||Comparative analysis of structure and properties of oxygen-free copper past different severe plastic deformation schemes|
|Number of pages||14|
|Journal||ФИЗИКА И ТЕХНИКА ВЫСОКИХ ДАВЛЕНИЙ|
|Publication status||Published - 2006|
- oxygen-free copper
- plastic deformation
- equal-channel angular pressing
- multiaxial deformation
- twist extrusion
- accumulative roll bonding
Dobatkin, S. V., Salischev, G. A., Kuznetsov, A. A., Reshetov, A. V., Synkov, A. S., & Konkova, T. N. (2006). Сравнительный анализ структуры и свойств бескислородной меди после различных способов интенсивной пластической деформации. ФИЗИКА И ТЕХНИКА ВЫСОКИХ ДАВЛЕНИЙ, 16(4), 23-36.