Affiliation:
1. Ulyanovsk State University
2. Ufa State Aviation Technical University
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.
Publisher
Trans Tech Publications, Ltd.
Subject
Condensed Matter Physics,General Materials Science,Atomic and Molecular Physics, and Optics
Reference11 articles.
1. Kolachev B.A., Elagin V.I., Livanov V.A. Metallurgical science and thermal treatment of nonferrous metals and alloys. /- Textbook for high schools., M.: Metallurgia, 1999, 349 p. (in Russian).
2. Krasilnikov N.A., Lojkowski W., Valiev R.Z. Grain refinement and mechanical properties of nickel subjected to severe plastic deformation / EMRS Fall meeting Interfacial effects and novel properties in nanomaterials,: Warsaw. - 2002. - P. 15-19.
3. Krasilnikov N.A., Pakiela Z., Lojkowski W., Valiev R.Z. Excellent mechanical properties of nickel obtained high pressure technique. / Sol. St. Phen. - 2005. - V. 101-102. - P. 49-54.
4. 50 100 150 200 250.
5. [5] [10] [15] [20] [25] [30] [35] [40] δδδδ, % σσσσ, MPa.
Cited by
5 articles.
订阅此论文施引文献
订阅此论文施引文献，注册后可以免费订阅5篇论文的施引文献，订阅后可以查看论文全部施引文献