High Strength and Ductility of Nanostructured Al Alloy 2024 Subjected to
High Pressure Torsion
|
| Journal |
Solid State Phenomena (Volume 114) |
| Volume |
High Pressure Technology of Nanomaterials |
| Edited by |
Witold Lojkowski and John R. Blizzard |
| Pages |
85-90 |
| DOI |
10.4028/www.scientific.net/SSP.114.85 |
| Online since |
July, 2006 |
| Authors |
D. Vorona,
Alfred V. Sharafutdinov,
Nikolay A. Krasilnikov
|
| Keywords |
High Pressure Torsion (HPT), Nanostructured Al-Based Alloy, Severe Plastic Deformation (SPD) |
| 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 the anvils at room temperature. The
nanostructured alloy possessed very high UTS (Ultimate tensile stress) above 1100 MPa at room
temperature, and superplastic behaviour at temperatures over 300°С. The microhardness of the
nanostructured alloy after superplastic deformation (1.5 GPa) was greater than that after the
standard treatment of the coarse-grained alloy (1.2 GPa). The influence of HPT parameters and heat
treatment on the structure and deformation behaviour of the alloy was studied.
The opportunity of achieving a combination high strength and good ductility in metals and alloys
opens perspectives for industrial applications, particularly, in micro-systems and for high-strength
items with complex geometry which could be obtained by superplastic forming. |
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