|Microstructure and texture evolution during ECAP of pure aluminium and Al - 4 vol.% Al4C3 powder alloy|
OROLINOVA, M., ĎURIŠIN, J., BESTERCI, M., ĎURIŠINOVÁ, K., KOČIŠKO, R., KVAČKAJ, T., SAKSL, K., OROLÍNOVÁ, Z.
vol. 50 (2012), no. 6, pp. 433 - 440
The study is focused on the microstructure and texture evolution in pure aluminium (prepared by the conventional casting technology) in comparison with the dispersion strengthened system Al - 4 vol.% Al4C3 (prepared by the powder metallurgy method) during the ECAP deformation. The ECAP process of the pure aluminium led to the dislocation cell and subsequent subgrain structure formation with a mean subgrain of 2 µm. An application of ECAP method in the powdered alloy led to the transversal fragmentation of as-received elongated grains and mainly nanosized grains formation. The final size of the grains was approximately 100 nm.
Pure aluminium after the ECAP contained a similar, but stronger, crystal orientation as-received Al (200) and in addition Al (311) orientation. In composite aluminium material the as-received Al (111) after the ECAP evolved into the dominating crystal orientation Al (220).
aluminium, dispersion strengthened Al, microstructure, texture, ECAP
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