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Changes in physical and mechanical properties of the Al-based alloy
1560 caused by severe plastic deformation
Krasnoveikin V.A. 2,а, Skripnyak V.A. 1,b, Moskvichev E.N.,
Kozulin A.A.1, Borodulin D.A.1
1Tomsk State University, 36, pr. Lenina, Tomsk, Russia
2Institute of Strength Physics and Materials Science of SB RAS, 2/4, pr. Akademicheskii, Tomsk, Russia
,
Keywords: Aluminum alloy; grain structure; mechanical properties; severe plastic deformation
The influence of severe plastic deformation (SPD) on the physical and mechanical properties of Al-
based alloy 1560 are investigated. SPD-method was realized according to the scheme of equal-channel an-
gular pressing (ECAP). The grain size distribution in coarse grain alloy varied in the range from 4 to 400
µm, and the average grain size was equal to about 50 µm. After four ECAP passes, a more uniform ul-
trafine-grained structure was obtained within the bulk with the average grain size about 3 μm. The average
microhardness of the alloy was increased after treatment by 50 % in the entire volume of the specimens. Ac-
cording to tensile test data, the yield strength and ultimate tensile strength were increased four ECAP passes
by 80 and 44 %, respectively. All experimental data prove that SPD in optimal treatment conditions en-
hances the strength characteristics of structural alloy 1560. The constants of approximating relationships for
the experimental tensile diagrams of the specimens from investigated alloy in as-received and processed
states were determined.