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The aim of works was to describe mathematically the kinetics of static recrystallization of the alloy type Fe–40 at.%Al–Zr–B (with 24.6 Al–0.01 B–0.18 Zr–0.01 C in wt.%) with the coarse-grained structure. The microstructure of the laboratory castings made of this extremely brittle alloy was homogenized by hot rolling of the material in the protective capsules and by the long-term annealing at 1200 °C. An initial microstructure with average grain size 0.77 ± 0.27 mm was obtained. Based on the isothermal plastic deformation tests and EBSD analysis, the static recrystallization kinetics of the prepared coarse-grained B2 iron aluminide after strain 0.20 was mathematically described. Recrystallized fraction depends on deformation/annealing temperature (900–1100 °C) as well as on annealing time. The activation energy of static recrystallization was calculated as 255 kJ mol−1. Competition between dynamic recovery and static recrystallization was proved after strain 0.35 and annealing temperature 1100 °C. Static recrystallization starts relatively easily in the studied alloy, but a very long-term annealing is quite necessary for the complete course of recrystallization. The mean size of recrystallized grains falls with the decreasing annealing temperature (0.47 ± 0.15 mm for temperature 1100 °C, and 0.22 ± 0.04 mm for 900 °C). Even at a temperature of 1200 °C the annealing after deformation should last approx. 1 min for obtaining the fully recrystallized microstructure. That is why the standard hot forming technologies should be combined by an interpass annealing in order to refine sufficiently the coarse grains.
Czasopismo
Rocznik
Tom
Strony
816--826
Opis fizyczny
Bibliogr. 36 poz., rys., tab., wykr.
Twórcy
autor
- VSB – Technical University of Ostrava, Faculty of Metallurgy and Materials Engineering, 17. listopadu 15, 708 33 Ostrava, Czech Republic
autor
- Institute of Physics AS CR, v. v. i., Na Slovance 1999/2, 182 21 Praha 8, Czech Republic
autor
- VSB – Technical University of Ostrava, Faculty of Metallurgy and Materials Engineering, 17. listopadu 15, 708 33 Ostrava, Czech Republic
autor
- Silesian University of Technology, Faculty of Metallurgy and Materials Engineering, Krasińskiego 8, 40-019 Katowice, Poland
autor
- Silesian University of Technology, Faculty of Metallurgy and Materials Engineering, Krasińskiego 8, 40-019 Katowice, Poland
autor
- Military University of Technology, ul. Gen. Sylvester Kaliski 2, 00-908 Warsaw 49, Poland
autor
- VSB – Technical University of Ostrava, Faculty of Metallurgy and Materials Engineering, 17. listopadu 15, 708 33 Ostrava, Czech Republic
autor
- Technical University of Liberec, Faculty of Mechanical Engineering, Studentska 1402/2, 461 17 Liberec I, Czech Republic
autor
- Military University of Technology, ul. Gen. Sylvester Kaliski 2, 00-908 Warsaw 49, Poland
autor
- Military University of Technology, ul. Gen. Sylvester Kaliski 2, 00-908 Warsaw 49, Poland
Bibliografia
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- [5] Y.D. Huang, W.Y. Yang, Z.Q. Sun, Improvement of room temperature tensile properties for Fe3Al-based alloys by thermomechanical and annealing processes, Materials Science and Engineering A 263 (1) (1999) 75–84.
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- [8] M. Jabłońska, A. Jasik, A. Hanc, Structure and some mechanical properties of Fe3Al-based cast alloys, Archives of Metallurgy and Materials 54 (3) (2009) 731–739.
- [9] I. Bednarczyk, M. Jabłońska, Plasticity of low aluminium alloys from Fe–Al, Archives of Metallurgy and Materials 57 (1) (2012) 271–276.
- [10] M. Jabłońska, A. Hanc, A. Szostak, A study of points defects in the B2-phase region of Fe–Al system by Mössbauer spectroscopy, Solid State Phenomena 163 (2010) 299–302.
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- [31] F.J. Humpreys, M. Hatherly, Recrystallization and Related Annealing Phenomena, Pergamon Press, Oxford, 2002.
- [32] P. Kratochvíl, I. Schindler, P. Hanus, R. Král, P. Harcuba, Static recrystallization of cold rolled intermetallic Fe17Al4Cr0.3Zr alloy, Journal of Materials Engineering and Performance 21 (9) (2012) 1932–1936.
- [33] S. Wang, S.B. Kang, J.H. Cho, Effect of hot compression and annealing on microstructure evolution of ZK60 magnesium alloys, Journal of Materials Science 44 (2009) 5475–5484.
- [34] Y.V.R.K. Prasad, D.H. Sastry, R.S. Sundar, S.C. Deevi, Optimization of Hot Workability and Hot Deformation Mechanisms in FeAl and Fe3Al Based Alloys, Structural Intermetallics (Jackson hole), 2001.
- [35] Y. Yang, I. Baker, Recrystallization of FeAl and Ni3Al with and without boron, Scripta Materialia 34 (5) (1996) 803–807.
- [36] I. Schindler, E. Hadasik, J. Kopeček, P. Kawulok, R. Fabík, P. Opěla, S. Rusz, R. Kawulok, M. Jabłońska, Optimization of laboratory hot rolling of brittle Fe–40 at.%Al–Zr–B aluminide, Archives of Metallurgy and Materials 60 (3) (2015) 1693–1701.
Uwagi
PL
Opracowanie ze środków MNiSW w ramach umowy 812/P-DUN/2016 na działalność upowszechniającą naukę (zadania 2017)
Typ dokumentu
Bibliografia
Identyfikator YADDA
bwmeta1.element.baztech-55298524-419f-48a2-a21e-8bc3441655c7