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ArticleName Rheological behavior of 01570 and AA5182 wrought aluminum alloys under hot deformation conditions
DOI 10.17580/tsm.2019.03.09
ArticleAuthor Yashin V. V., Rushchits S. V., Aryshensky E. V., Latushkin I. A.

JSC “Arconic SMZ”, Samara, Russia:

V. V. Yashin, Manager, e-mail:

I. A. Latushkin, Leading Specialist, e-mail:


South Ural State University, Chelyabinsk, Russia:
S. V. Rushchits, Professor, Department of Materials Science and Physics and Chemistry of Materials


Samara University, Samara, Russia:
E. V. Aryshensky, Associate Professor of the Department of Metals Technology and Aviation Materials


The rheological properties under hot deformation of 01570 alloy containing scandium and zirconium micro-additives were studied in comparison with alloy AA5182. Hot deformation was performed by uniaxial compression on Gleeble 3800 thermomechanical processes physical simulator at the temperature range of 350–450 oС and strain rates of 0.001–10 s–1. Alloy samples were selected from ingots obtained under industrial conditions and subjected to standard homogenization. It is demonstrated, that alloys flow stresses increase with rate increase and deformation temperature decrease reflecting changes of Zener-Hollomon parameter, describing the temperature-rate deformation mode. At low Zener-Hollomon parameter values, two studied alloys have close flow stress values; at high parameter values 01570 alloy, micro-alloyed with scandium and zirconium, has higher strain resistance compared to AA5182 alloy. This effect is explained by the presence of fine Al3 (Sc, Zr) intermetallic compounds particles in 01570 alloy, causing dispersion hardening, as well as a higher magnesium content in this alloy. Obtained analytical expressions allow calculating the steady-state flow stresses of the alloys at specified temperature — rate parameters of hot deformation. These expressions application can be recommended for slab rolling practice calculation, being especially true 01570 type alloys, requiring strictly regulated temperature conditions during processing. A computer simulation of 01570 alloy reverse rolling was performed using the obtained analytical expressions with account for this alloy flow stress values. It is shown that the calculated and actual values of the torque on all passes of the reversing rolling coincide with the accuracy sufficient for engineering purposes.

keywords Aluminum alloys microalloying with scandium, hot rolling, rolling process simulation, DEFORM 2D, mechanical properties.

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