High strength and ductility of nanostructured Al-based alloy, subjected by high pressure technique

Dmitry A. Vorona 2A Sharafutdinov 1Nikolay A. Krasilnikov 2

1. Institute of Physics of Advanced Materials, Ufa State Aviation Technical University, K.Marks St.12, Ufa 450000, Russian Federation
2. Ulyanovsk State University (UlGU), L.Tolstoy, 42, Ulyanovsk 432700, Russian Federation

Abstract

The structure and mechanical properties of Al-based alloy 2024 after high-pressure torsion (HPT) was investigated. Alloy 2024 with homogeneous structure and grain size about 70 nm was obtained using HPT at 6 GPa pressure and 5 turns of anvils at room temperature. The nanostructured alloy at room temperature demonstrated very high UTS above 1100 MPa, and superplastic behavior at temperature higher then 300С. The microhardness of nanostructured alloy after superplastic deformation (1.5 GPa) was more than after standard treatment of coarse-grained alloy (1.2 GPa). The influence parameters of HPT and heat treatment on structure and deformation behavior of alloy were studied.
Opportunity of achievement in metals and alloys of combination high strength and good ductility opens perspectives of its application in industry, particularly, for mirco-systems and for high-strength details with complex geometry obtained due to superplastic forming.

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Presentation: oral at E-MRS Fall Meeting 2005, Symposium I, by Dmitry A. Vorona
See On-line Journal of E-MRS Fall Meeting 2005

Submitted: 2005-04-26 06:03
Revised:   2009-06-07 00:44
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