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Issues »  Volume 39, Issue 5

Segregation Refinement of the Grain Structure of Aluminium and Its Alloys

E. V. Lutsenko1, V. A. Kreshchenko2, M. D. Rud’3, O. V. Sobol’4, M. A. Glushchenko4, A. I. Zubkov4

1National Science Center Kharkov Institute of Physics and Technology, NAS of Ukraine, 1, Akademicheskaya Str., 61108 Kharkov, Ukraine
2State Enterprise Zorya-Mashproekt Gas Turbine Research and Development Complex, 42A Bogoyavlenskiy Ave., 54018 Mykolaiv, Ukraine
3Motor Sich JSC, 15 Motorostroiteley Ave., 69068 Zaporizhzhya, Ukraine
4National 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 ≅ 3 at.% reduces the grain size of condensates from 2 μm 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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