Detection of Intermediate Phases in Metal Alloys

Abstract:

In addition to property anomalies, a distinguishing feature of the intermediate phase is the qualitative change of the crystallization or recrystallization interval (Q∆LS) that occurs at congruent and incongruent melting phases, at eutectic or eutectoid points, at the ends of eutectic or eutectoid horizontals, and also at any nonmonotonicity of the liquidus, since the solidus or solidoid is a horizontal in eutectic or eutectoid systems. A technique has been developed that allows us to associate anomalies in the properties of industrial alloys with state diagrams based on the first established criterion - a qualitative change (length in temperature) of the crystallization (recrystallization) interval (Q∆LS), as well as with a difference in the structural heredity (genealogy) of the component atoms that make up dual system. A joint analysis of the anomalies in the properties of binary alloys with state diagrams (based on the established criterion (Q∆LS)) allows us to relate the latter to the presence of intermediate phases in Al − Si, Fe − C, Al − Cu systems. The intermediate phases AnBm-Q∆LS explaining the anomalies of properties are declared: ~Al₇Si, Al₄₁Cu₉ − correspond to the eutectic point; Fe₂₄C − eutectoid point; Al₁₁Si, AlSi₆ − the bend of the liquidus; Fe₄₂C − bending liquidoid; Al₄₉Cu, Al_98.5Si_1.5 − the end of the eutectic horizontal; Cu₄Al, Cu₇Al₃ − to the ends of the eutectoid horizontal.

• Periodical: Key Engineering Materials (Volume 854)
• Pages: 23-29
• DOI: https://doi.org/10.4028/www.scientific.net/KEM.854.23
• Online since: July 2020
• Authors: Karen Yu. Shakhnazarov*, E.I. Pryakhin
• Keywords: Al-Cu Systems, Al-Si, Fe-C, Intermediate Phases, Joint Analysis, Metal Alloys

References

[1] A.A. Bochvar, On the dependence of mechanical properties of alloys on their composition and structure, News of the USSR Academy of Science, Department of Technical Sciences 5 (1946) 743-752.

[2] I.I. Kornilov, Physical and Chemical Fundamentals of Heat Resistance of Alloys, USSR Academy of Sciences, Moscow, (1961).

[3] N.I. Belyaev, N.T. Gudtsov, Review of theoretical studies and practical works on the definition of elastic limit, Journal of the Russian Metallurgical Society, Part 1, 3 (1914)375-414.

[4] E. Gudremon, Special Steels, In 2 volumes, Vol. 1, Metallurgizdat, Moscow, (1959).

[5] P. Obergoffer, Technical Iron, Metallurgizdat, Moscow, (1940).

[6] A. E. Wol, I. K. Kagan, Structure and Properties of Double Metal Systems, In 4 volumes, Vol. 3, Nauka, Moscow, (1976).

[7] F. A. Shank, Structures of Double Alloys, Metallurgy, Moscow, (1973).

[8] N. S. Kurnakov, Selected Works, in 3 volumes, Vol. 2, USSR Academy of Sciences, (1961).

[9] M. Hansen, Binary Alloy Structures, in 2 volumes, Vol. 1, Metallurgizdat, Leningrad, Moscow, (1941).

[10] V. S. Meskin, Ferromagnetic Alloys and Their Properties, ONTI NKTP, Leningrad, Moscow, (1937).

[11] B. A. Baum, G. A. Hasin, G. V. Trashunov, E. A. Klimenkov, Yu. A. Bazin, L. V. Kovalenko, V. B. Mikhailov, G. A. Raspopova, Liquid Steel, Metallurgy, Moscow, (1984).

[12] D. A. Petrov, Issues of Aluminum Alloy Theory, Metallurgizdat, Moscow, (1951).

[13] A. A. Bochvar, Metal Science, Metallurgizdat, Moscow, (1956).

[14] G. G. Krushenko, V. I. Shpakov, V. I. Nikitin, S. I. Torshilov, On some peculiarities of structural-sensitive characteristics of Al-Si alloys, News of the USSR Academy of Sciences. Metals 4 (1977) 204-207.

[15] A. E. Vol, Structure and Properties of Double Metal Systems, in 4 volumes, Vol. 1, State publishing house of physical and mathematical literature, Moscow, (1959).

[16] A. A. Vertman, A. M. Samarin, Properties of Iron Melts, Nauka, Moscow, (1969).

[17] A. A. Bochvar, I. I. Novikov, On solid-liquid state of alloys during their crystallization, News of the USSR Academy of Sciences, Department of Technical Sciences 2 (1952) 217-224.

[18] L. F. Mondolfo, Structure and Properties of Aluminum Alloys, Metallurgy, Moscow, (1979).

[19] E. M. Savitsky, Influence of Temperature on Mechanical Properties of Metals and Alloys, USSR Academy of Sciences, Moscow, (1957).

[20] V. Ya. Anosov, S. A. Pogodin, Basic principles of physical and chemical analysis, USSR Academy of Sciences, Moscow, Leningrad, (1947).

[21] K. Yu. Shakhnazarov, E. I. Pryakhin, Substantiation of relation between anomalies in properties of steel melts (at ~0.5 %С) and presence of intermediate phase ~Fe42C, CIS Iron and Steel Review 12 (2016) 18-21.

DOI: 10.17580/cisisr.2016.02.04

[22] G. N. Elanskiy, Structure and Properties of Metal Melts, Metallurgy, Moscow, (1991).

[23] L. S. Moroz, Thin Structure and Strength of Steel, Metallurgizdat, Moscow, (1957).

[24] V. V. Tsukanov, N. V. Lebedeva, Yu M. Markova, Conditions of diffusion transformation of austenite into steel Cr-3Ni-Mo-V-composition with high austenite stability, Notes of Mining Institute 230 (2018) 153-159.

[25] A. M. Samarin, S. G. Fedotov, I. P. Fedotov, E. P. Synodova, Structure and properties of iron alloys with carbon, in: Metallurgical science. Materials of the Symposium on Metallurgy and Metal Science dedicated to the 100th anniversary of the discovery of iron polymorphism by D. K. Chernov, Nauka, Moscow, 1971, pp.231-235.

[26] P. Ya. Saldau, Method of Electrical Conductivity at High Temperatures, USSR Academy of Sciences, Moscow, Leningrad, (1952).

[27] V. S. Ivanova, V. F. Terentyev, Physical nature and destruction patterns, in: Metallurgical science. Materials of the seminar on Metallurgy and Metal Science dedicated to the 100th anniversary of the discovery of iron polymorphism by D. K. Chernov, Nauka, Moscow, 1971, pp.231-235.

[28] P. P. Arsentiev, L. A. Koledov, Metal Melts and Their Properties, Metallurgy, Moscow, (1976).