Microstructural Changes in a High-Manganese Austenitic Fe-Mn-Al-C Steel

• Autorzy: Witkowska M. , Zielińska-Lipiec A. , Kowalska J. , Ratuszek W.

Identyfikatory

DOI

10.2478/amm-2014-0163

Warianty tytułu

PL

Zmiany mikrostrukturalne w wysokomanganowej stali austenitycznej Fe-Mn-Al-C

• Języki publikacji: EN

Abstrakty

EN

Microstructural changes in the age-hardenable Fe-28wt.%Mn-9wt.%Al-1wt.%C steel during ageing at 550°C for various times have been investigated by transmission electron microscopy (TEM) and X-ray diffraction (XRD). The steel was produced in an induction furnace and the ingot, after homogenization at 1150°C for 3 hours under a protective argon atmosphere, was hot-rolled and subsequently cold-rolled up to 23% reduction. The sheet was then aged at 550°C for various times in an argon atmosphere and cooled in air. XRD analysis and TEM observations revealed a modulated structure and superlattice reflections produced by spinodal decomposition, which occurred during ageing at 550°C. Theexistence of satellites suggests that either (Fe, Mn)₃AlC_x carbides were formed within the austenite matrix by spinodal decomposition during cooling or chemical fluctuactions occurred between the (Fe, Mn)₃AlC_x carbides and the austenitic matrix.

PL

W pracy analizowano zmiany mikrostruktury w stali Fe-28%wt. Mn-9%wt. Al-1%wt.C zachodzące podczas starzenia w temperaturze 550°C w różnych czasach. Stal Fe-28Mn-9Al-1C wytopiono w próżniowym piecu indukcyjnym. Po odlaniu wlewek homogenizowano w temperaturze 1150°C przez 3 godziny w atmosferze argonu. Wlewek walcowano na gorąco a następnie na zimno do 23 % odkształcenia. Próbki po odkształceniu starzono w temperaturze 550°C dla różnych czasów w atmosferze argonu i chłodzono na powietrzu. Obserwacje elektronomikroskopowe starzonej stali Fe-28Mn-9Al-1C ujawniły modulowaną strukturę i refleksy od nadstruktury, co było efektem rozpadu spinodalnego, który miał miejsce podczas procesu starzenia. Występowanie satelitów na zapisach dyfrakcyjnych sugeruje, że węgliki (Fe, Mn)₃AlC_x powstały w osnowie austenitycznej na skutek rozpadu spinodalnego zachodzącego podczas chłodzenia czy fluktuacji chemicznych występujących pomiędzy węglikami Fe, Mn)₃AlC_x i osnową austenityczną.

Słowa kluczowe

EN

high-manganese austenitic steel hot-rolling; spinodal decomposition; carbides; microstructure

PL

wysokomanganowa stal austenityczna; rozpad spinodalny; węgliki; mikrostruktura

• Wydawca: Institute of Metallurgy and Materials Science of Polish Academy of Sciences ; Committee of Materials Engineering and Metallurgy of Polish Academy of Sciences
• Czasopismo: Archives of Metallurgy and Materials
• Rocznik: 2014
• Tom: Vol. 59, iss. 3
• Strony: 971--975
• Opis fizyczny: Bibliogr. 29 poz., rys., tab.

Twórcy

autor

Witkowska M.

• AGH University of Science and Technology, Faculty of Metals Engineering and Industrial Computer Science, Al. A. Mickiewicza 30, 30-059 Kraków, Poland

autor

Zielińska-Lipiec A.

• AGH University of Science and Technology, Faculty of Metals Engineering and Industrial Computer Science, Al. A. Mickiewicza 30, 30-059 Kraków, Poland

autor

Kowalska J.

• AGH University of Science and Technology, Faculty of Metals Engineering and Industrial Computer Science, Al. A. Mickiewicza 30, 30-059 Kraków, Poland

autor

Ratuszek W.

• AGH University of Science and Technology, Faculty of Metals Engineering and Industrial Computer Science, Al. A. Mickiewicza 30, 30-059 Kraków, Poland

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