Effect of the Al–Zr–Y master alloy composition on the modifying effect in the Al–4% Cu alloy
- Authors: Popova E.A.1, Kotenkov P.V.1,2
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Affiliations:
- Institute of Metallurgy, Ural Branch
- Ural Federal University
- Issue: Vol 2016, No 2 (2016)
- Pages: 167-169
- Section: Article
- URL: https://journals.rcsi.science/0036-0295/article/view/170364
- DOI: https://doi.org/10.1134/S0036029516020142
- ID: 170364
Cite item
Abstract
The results of modifying the Al–4% Cu alloy with test Al–1.04% Zr–0.70% Y and Al–1.23% Zr–0.39% Y master alloys are reported; the Zr-to-Y atomic-percentage ratio in the alloys is 1.41 and 3.08, respectively. The effect of small amounts of Zr and Y (from 0.1 to 0.3%) added in the form of test ternary master alloys of different compositions and binary Al–Zr and Al–Y master alloys on the grain refinement in the Al–4% Cu alloy has been studied. The structure of the initial alloy is characterized by pronounced directional solidification of the α phase. As the Zr + Y content increases, the columnar-crystal zone decreases and the equiaxed-crystal zone increases; at a (Zr + Y) content of 0.326%, only equiaxed crystals ~200 μm in size are present in an ingot. When Zr and Y are added with binary master alloys, the macrostructure of the modified Al–4% Cu alloys indicates that columnar crystals grow until their contact at the center of the ingot, and their growth is independent of the amount of added Zr and Y.
About the authors
E. A. Popova
Institute of Metallurgy, Ural Branch
Author for correspondence.
Email: p.kotenkoff@yandex.ru
Russian Federation, ul. Amundsena 101, Yekaterinburg, 620016
P. V. Kotenkov
Institute of Metallurgy, Ural Branch; Ural Federal University
Email: p.kotenkoff@yandex.ru
Russian Federation, ul. Amundsena 101, Yekaterinburg, 620016; st. Mira 19, Yekaterinburg, 620002