Effect of gases released during solidification of castings on microstructure of alloys
https://doi.org/10.21122/1683-6065-2020-2-12-14
Abstract
Thermodynamic calculation of formation of spherical gas bubbles different in water – wetting on flat surfaces by metal melt is made. This process consists of two stages. The first stage is formation of equilibrium gas bubble in the form of ball segment. The second stage is its swinging into a spherical bubble. Calculations were made for gas bubbles with constant volume. It is shown that Gibbs energy of spherical gas bubble formation on water – wetting metal melt substrate is three times less than on nonwettable melt substrate. Thus, gases released by solidification of the castings will preferably be formed and removed as bubbles on the molten metal surfaces of the crystallizable phases of the alloys and directly affect on their microstructure.
Keywords
gas bubbles,
thermodynamic calculation,
wetting,
castings,
alloys,
melts,
microstructure,
solidification
About the Authors
E. I. Marukovich
Institute of Technology of Metals of National Academy of Sciences of Belarus
Belarus
11, Bialynitskogo-Biruli Str., Mogilev, Belarus
Belarus
11, Bialynitskogo-Biruli Str., Mogilev, Belarus
V. Yu. Stetsenko
Institute of Technology of Metals of National Academy of Sciences of Belarus
Belarus
11, Bialynitskogo-Biruli Str., Mogilev, Belarus
Belarus
11, Bialynitskogo-Biruli Str., Mogilev, Belarus
References
1. . Chalmers B. Teoriya zatverdevaniya [Theory of hardening] . Moscow, Metallurgiya Publ ., 1968 . 288 p .
2. . Nikiforov G. D. Metallurgiya svarki plavleniem alyuminievyh splavov [Metallurgy of aluminum alloy fusion welding] . Moscow, Mashinostroenie Publ ., 1972 . 264 p .
3. . Dobatkin V. I., Gabidullin R. M., Kolachev B. A., Makarov G. S. Gazy i okisly v alyuminievyh deformiruemyh splavah [Gases and oxides in aluminium deformable alloys] . Moscow, Metallurgiya Publ ., 1976 . 264 p .
4. . Stroganov G. B. Vysokoprochnye litejnye alyuminievye splavy [High‑strength cast aluminium alloys] . Moscow, Metallurgiya Publ ., 1985 . 216 p .
5. . Nejmark V. E. Modificirovannyj stal’noj slitok [The modified steel ingot] . Moscow, Metallurgiya Publ ., 1977 . 154 p .
6. . Al’tman M.B., Stromskaya N. P. Povyshenie svojstv standartnyh litejnyh alyuminievyh splavov [Improving the Properties of Standard Aluminium Casting Alloys] . Moscow, Metallurgiya Publ ., 1984 . 128 p
Review
For citations:
Marukovich E.I., Stetsenko V.Yu. Effect of gases released during solidification of castings on microstructure of alloys. Litiyo i Metallurgiya (FOUNDRY PRODUCTION AND METALLURGY). 2020;(2):12-14. (In Russ.) https://doi.org/10.21122/1683-6065-2020-2-12-14
Views:
2094
Email this article 