Issues »  Volume 39, Issue 5

Segregation Refinement of the Grain Structure of Aluminium and Its Alloys

E. V. Lutsenko$^{1}$, V. A. Kreshchenko$^{2}$, M. D. Rud’$^{3}$, O. V. Sobol’$^{4}$, M. A. Glushchenko$^{4}$, A. I. Zubkov$^{4}$

$^{1}$National Science Center Kharkov Institute of Physics and Technology, NAS of Ukraine, 1, Akademicheskaya Str., 61108 Kharkov, Ukraine
$^{2}$State Enterprise Zorya-Mashproekt Gas Turbine Research and Development Complex, 42A Bogoyavlenskiy Ave., 54018 Mykolaiv, Ukraine
$^{3}$Motor Sich JSC, 15 Motorostroiteley Ave., 69068 Zaporizhzhya, Ukraine
$^{4}$National Technical University ‘Kharkiv Polytechnic Institute’, 21 Kyrpychov Str., 61002 Kharkiv, Ukraine

Received: 08.02.2017; final version - 16.03.2017. Download: PDF

The structure of condensates and cast samples of aluminium, Al–Fe and Al–Zr alloys crystallized from both the melt and the vapour phase in a vacuum is studied. As shown, the alloying of the vapour flow of a matrix metal, i.e. aluminium, with iron up to $\cong$ 3 at.% reduces the grain size of condensates from 2 $\mu$m to 50 nm. The dispersing effect of iron and zirconium on the grain structure of aluminium is demonstrated on the castings of this metal, where a decrease in the grain size is observed by more than one order of magnitude. Refinement of the grain structure of aluminium is explained by the formation of the grain-boundary segregation by atoms of alloying elements during crystallization from both the vapour and the melt.

Key words: condensation, crystallization, segregation, grain size, aluminium.

URL: http://mfint.imp.kiev.ua/en/abstract/v39/i05/0607.html

DOI: https://doi.org/10.15407/mfint.39.05.0607

PACS: 61.66.Dk, 64.75.Op, 68.35.Fx, 68.55.Ln, 81.05.Ni, 81.10.Fq, 81.15.Kk

Citation: E. V. Lutsenko, V. A. Kreshchenko, M. D. Rud’, O. V. Sobol’, M. A. Glushchenko, and A. I. Zubkov, Segregation Refinement of the Grain Structure of Aluminium and Its Alloys, Metallofiz. Noveishie Tekhnol., 39, No. 5: 607—620 (2017) (in Russian)

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