Kinetics of static recrystallization in the coarse-grained Fe–40 at.%Al–Zr–B alloy

• Autorzy: Schindler I. , Kopeček J. , Kawulok P. , Jabłońska M. , Hadasik E. , Jóźwik P. , Opěla P. , Hanus P. , Polkowski W. , Bojar Z.

Identyfikatory

DOI

10.1016/j.acme.2017.03.004

• Języki publikacji: EN

Abstrakty

EN

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.

Słowa kluczowe

EN

iron aluminide; hot compression test; isothermal annealing; EBSD; static recrystallization

PL

ściskanie na gorąco; rekrystalizacja; wyżarzanie izotermiczne

• Wydawca: Springer ; Wrocław University of Science and Technology
• Czasopismo: Archives of Civil and Mechanical Engineering
• Rocznik: 2017
• Tom: Vol. 17, no. 4
• Strony: 816--826
• Opis fizyczny: Bibliogr. 36 poz., rys., tab., wykr.

Twórcy

autor

Schindler I.

• VSB – Technical University of Ostrava, Faculty of Metallurgy and Materials Engineering, 17. listopadu 15, 708 33 Ostrava, Czech Republic

autor

Kopeček J.

• Institute of Physics AS CR, v. v. i., Na Slovance 1999/2, 182 21 Praha 8, Czech Republic

autor

Kawulok P.

• VSB – Technical University of Ostrava, Faculty of Metallurgy and Materials Engineering, 17. listopadu 15, 708 33 Ostrava, Czech Republic

autor

Jabłońska M.

• Silesian University of Technology, Faculty of Metallurgy and Materials Engineering, Krasińskiego 8, 40-019 Katowice, Poland

autor

Hadasik E.

• Silesian University of Technology, Faculty of Metallurgy and Materials Engineering, Krasińskiego 8, 40-019 Katowice, Poland

autor

Jóźwik P.

• Military University of Technology, ul. Gen. Sylvester Kaliski 2, 00-908 Warsaw 49, Poland

autor

Opěla P.

• VSB – Technical University of Ostrava, Faculty of Metallurgy and Materials Engineering, 17. listopadu 15, 708 33 Ostrava, Czech Republic

autor

Hanus P.

• Technical University of Liberec, Faculty of Mechanical Engineering, Studentska 1402/2, 461 17 Liberec I, Czech Republic

autor

Polkowski W.

• Military University of Technology, ul. Gen. Sylvester Kaliski 2, 00-908 Warsaw 49, Poland

autor

Bojar Z.

• Military University of Technology, ul. Gen. Sylvester Kaliski 2, 00-908 Warsaw 49, Poland

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Uwagi

PL

Opracowanie ze środków MNiSW w ramach umowy 812/P-DUN/2016 na działalność upowszechniającą naukę (zadania 2017)