MECHANICAL PROPERTIES OF TWIN-ROLL CAST ALUMINUM SHEETS AFTER CONSTRAINED GROOVE PRESSING

1 BAJER Jan
Co-authors:
1 CIESLAR Miroslav 1 ŠLAPÁKOVÁ Michaela 1 ZIMINA Maria 2 ZRNÍK Josef 3 MATERNA Aleš
Institutions:
1 Charles University in Prague, Faculty of Mathematics and Physics, Prague, Czech Republic, EU
2 COMTES FHT, Dobřany, Czech Republic, EU
3 Czech Technical University in Prague, Faculty of Nuclear Sciences and Physical Engineering, Prague, Czech Republic, EU
Conference:
25th Anniversary International Conference on Metallurgy and Materials, Hotel Voronez I, Brno, Czech Republic, EU, May 25th - 27th 2016
Proceedings:
Proceedings 25th Anniversary International Conference on Metallurgy and Materials
Pages:
1216-1221
ISBN:
978-80-87294-67-3
ISSN:
2694-9296
Published:
14th December 2016
Proceedings of the conference were published in Web of Science and Scopus.
Metrics:
83 views / 19 downloads
Abstract

Severe plastic deformation methods preserve dimensions of the material and reduce the grain size down to submicrometer scale. Twin-roll cast strips prepared from AA 3003 aluminum alloy (in wt.%) with 1 % Mn, 0.2 % Fe, 0.5 % Si, 0.2 % Cu and small additions of zirconium (0.2 %) and chromium (0.1 %) were subjected to deformation by Constrained Groove Pressing (CGP). The microhardness distribution along the strip cross-section reflects an inhomogeneous distribution of total equivalent strain simulated by finite element method only for one CGP cycle. Subsequently, after third CGP cycle, microhardness saturates and its distribution becomes more homogenous. Evolution of microstructure and mechanical properties during subsequent annealing was studied by transmission electron microscopy and electron backscatter diffraction. Inhomogeneous recovery of dislocation structure and recrystallization were observed during this annealing.

Keywords: Al-Mn-Zr alloy, twin-roll casting, CGP, recrystallization, electron microscopy

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