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Excellent mechanical properties of UFG metals and alloys, subjected to combination of severe plastic deformation methods.
|Nikolay Krasilnikov 1,3, Witold Łojkowski 2, Ruslan Z. Valiev 1|
1. Institute of Physics of Advanced Materials, Ufa State Aviation Technical University, K.Marks St.12, Ufa 450000, Russian Federation
The Ni and Al-based alloy 2024 after different methods of severe plastic deformation (SPD) are investigated. The equal channel angular pressing (ECAP) and cold rolling nickel, subjected also to high-pressure torsion (HPT), is characterized of large strain degree, homogeneous structure with grain size 120 nm and shows at room temperature the record strength with ultimate tensile stress (UTS) (1270 MPa), but limited plasticity (6%). The combination of high strength and plasticity managed to be obtained using the annealing at 200C of Ni after ECAP and rolling. This treatment of Ni leads to UTS about 900 MPa and ductility 12%.
Presentation: oral at E-MRS Fall Meeting 2004, Symposium I, by Nikolay A. Krasilnikov
See On-line Journal of E-MRS Fall Meeting 2004
Submitted: 2004-06-17 11:49 Revised: 2009-06-08 12:55