Investigator: prof. Ing. Václav Sklenička, DrSc.
Number of Project: IAA2041301
Agency: Grant Agency of the Academy of Sciences of the Czech Republic
Duration: 01. 01. 2003 - 31. 12. 2007

Ultrafine-grained (UFG) materials have emerged as a new class of materials with unusual microstructures, mechanical, physical and chemical properties compared with conventional coarse-grained materials. Research regarding UFG materials is considered as a matter of scientific and industrial importance worldwide. Equal-channel angular processing (ECAP) has become an important technique for refining grain size in metals. The ECAP technology has been used effectively to produce UFG materials with better strength at lower temperatures and faster strain rate. Despite the current interest in UFG materials there have been no systematic study on their creep behaviour. However, a good understanding of mechanisms of creep deformation and damage processes could be most valuable in the further design and processing of UFG materials. Thus, the main objective of the project is description and explanation of creep behaviour and operating mechanisms in selected UFG metals and alloys.

V.I.Betekhtin, A.G.Kadomtsev, P.Král, J. Dvořák, M.Svoboda,I.Saxl and V.Sklenička
Significance of Microdefects Induced by ECAP in Aluminium,
Al-0.2%Sc Alloy and Copper
Materials Science Forum Vols. 567-568 (2008) pp. 93-96

Král, P., Dvořák, J., Sklenička, V.
Microstructural evolution and creep of an Al-0.2wt.%Sc alloy after equal-channel angular pressing.
Mater. Sci. Forum Vols. 584-586, (2008), p. 846-851.

V. Slenička, J. Dvořák, M. Svoboda:
Effect of processing route on microstructure and mechanical behaviour of ultrafine grained metals processed by severe plastic deformation
Mater. Sci. Forum, 482 (2005),p. 83-88

V. Sklenička, J. Dvořák, M. Svoboda:
Creep in ultrafine grained aluminium
Mater. Sci. Eng. A, 387-389, (2004),p. 696-701

V. Sklenička, J. Dvořák, P. Král:
Creep processes in pure aluminium processed by equal-channel angular pressing
Mater. Sci. Eng. A,410-411,(2005), 408-412

V. Sklenička, P. Král, L. Ilucová,I. Saxl, J Dvořák, M. Svoboda:
Inhomogenity of microstructure and creep of ECAP aluminium
Mater. Sci. Forum, 503-504, (2006),p. 245-250.

Saxl, Ivan - Sklenička, Václav - Ilucová, Lucia - Svoboda, Milan - Král, Petr
Structure development during ECAP and subsequent creep of aluminium.
Materials Science Forum. Roč. 539-543, (2007), s. 493-498. ISSN 0255-5476

I.Saxl, V. Sklenička, L. Ilucova, M. Svoboda and P. Kral
Subgrain boundaries in ECAP aluminium
Materials Science Forum, Vols 561-565, (2007), pp 813-816

I. Saxl, V. Sklenička, L. Ilucova, M. Svoboda and P. Král
Subgrain boundaries in ECAP aluminium
Materials Science Forum, Vols. 561-565, (2007), pp 813-816

Betekhtin, V. I., Kadomtsev, A. G., Sklenička, Václav, Saxl, Ivan
Nanoporosity of fine-crystalline aluminium and an aluminium-based alloy.
Physics of the Solid State. Vol. 49, 10 (2007), p. 1874-1877. ISSN 1063-7834.

I. Saxl, V. Sklenička, L. Ilucová, M. Svoboda, J. Dvořák, P. Král
The link between microstructure and creep in aluminum processed by equal-channel angular pressing
Mater. Sci. Eng. A 503,(2009), p.82

V. Sklenička, J. Dvořák, P. Král, M. Svoboda, I. Saxl
Some factors affecting the creep behaviour of metallic materials processed by equal-channel angular pressing
Int. J. Mat. Res. (formelly Z. Metallkd.) 100, (2009), p. 762

Ivan Saxl, Lucia Ilucová, Milan Svoboda, Václav Sklenička,
Vladimir I. Betekhtin, Andrey G. Kadomtsev, Petr Král
Structural Non-homogeneity and Thermal Instability of ECAP
Aluminium
Materials Science Forum Vols. 567-568 (2008) pp. 193-196

Saxl, Ivan, Ilucová, Lucia, Svoboda, Milan, Sklenička, Václav, Betekhtin, V. I., Kadomtsev, A. G., Král, Petr
Structural non-homogenity and thermal instability of ECAP aluminium.
Materials Science Forum. Vol. 567-568, (2008), p. 193-196.