Structure, phase composition, mechanical and corrosion properties of aluminum-based composites

Keywords

aluminum matrix composite materials, mechanical properties, corrosion properties, electrochemical corrosion, hot forging.

Cite as

Shishkina Yu. O., Shishkina Yu. O., Bagliuk G. A., Kyryliuk Ye. S., Kyryliuk S. F., Tolochyna O. V., and Talash V. M. Structure, phase composition, mechanical and corrosion properties of aluminum-based composites. Physicochemical Mechanics of Materials. 2023. 59(6), 034-039.

https://doi.org/10.15407/pcmm2023.06.034

Abstract

The structure, phase composition, basic mechanical and corrosion properties of powder aluminum matrix composites obtained by the hot forging (HF) were studied. The results of studies of the microstructure of synthesized master alloy of different composition revealed the presence of particles of the strengthening phase of different dispersion and shape, which are rather evenly distributed in the metal matrix. The method of X-ray phase analy­sis established the presence of titanium and aluminum carbide, and also a number of lines belonging to titanium aluminides Al₃Ti, Al₅Ti₃, Al₂Ti, AlTi₃, Al₅Ti₂. Aluminium compo­site materials were strengthened by the Al–C–Ti master alloy of various composition. Studies of the samples obtained after HF showed that the microstructure of the composites is characterized by the pre­sence of two phases: the basis is the aluminum matrix, in which the agglomerates of mas­ter alloy are distributed. The composites reinforced with 15 mass% of the master alloy (20Al–64Ti–16C) in the initial charge and obtained by the method of sintering and HF have increased strength characteristics and demonstrate absolute stability in a 3.5% NaCl solution, regard­less of the phase composition of the master alloy.

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