XRD and EBSD Measurements of Directional Solidification Fe-C Eutectic Alloy

• Autorzy: Trepczyńska-Łent M.
• Języki publikacji: EN

Abstrakty

EN

In a vacuum Bridgman-type furnace, under an argon atmosphere, directionally solidified sample of Fe-C alloy was produced. The pulling rate was v = 83 μm/s (300 mm/h) and constant temperature gradient G = 33,5 K/mm. The microstructure of the sample was examined on the longitudinal section using an Optical Microscope and Scanning Electron Microscope. The X-ray diffraction and electron backscatter diffraction technique (EBSD) have been used for the crystallographic analysis of carbide particles in carbide eutectic. The X-ray diffraction was made parallel and perpendicular to the axis of the goniometer. The EBSD shows the existence of iron carbide Fe₃C with orthorhombic and hexagonal structure. Rapid solidification may cause a deformation of the lattice plane which is indicated by different values of the lattice parameters. Such deformation could also be the result of directional solidification. Not all of the peaks in X–ray diffractograms were identified. They may come from other iron carbides. These unrecognized peaks may also be a result of the residual impurity of alloy.

Słowa kluczowe

EN

X-ray diffraction; EBSD technique; carbide eutectic; directional solidification

PL

dyfrakcja rentgenowska; dyfrakcja elektronów wstecznie rozproszonych; krzepnięcie kierunkowe

• Wydawca: Komisja Odlewnictwa Polskiej Akademii Nauk Oddział w Katowicach
• Czasopismo: Archives of Foundry Engineering
• Rocznik: 2016
• Tom: Vol. 16, iss. 4
• Strony: 169--174
• Opis fizyczny: Bibliogr. 13 poz., rys., tab., wykr.

Twórcy

autor

Trepczyńska-Łent M.

• Department of Materials Science and Engineering, Mechanical Engineering Faculty, UTP University of Science and Technology, Al. prof. S. Kaliskiego 7, 85-796 Bydgoszcz, Poland

Bibliografia

• [1] Gholizadeh, H. (2013). The influence of alloying and temperature on the stacking-fault energy of iron-based alloys. Dissertation, Leoben.
• [2] Khromov, K.Yu. & Vaks, V.G. (2008). On the theory of phase equilibria austenite cementite in steel and on interactions of carbon atoms in FCC and HCP iron. Journal of Experimental and theory Physics. 106(2), 265-279.
• [3] Okamoto, H. (1992). The C-Fe (Carbon-Iron) System, Journal of Phase Equilibria. 13(5).
• [4] Fang, C.M., van Huis, M.A., Thijsse, B.J. & Zandbergen, H.W. (2012). Stability and crystal structures of iron carbides, Physical Review. B 85, 054116.
• [5] Fang, C.M., van Huis, M.A. & Zandbergen, H.W. (2010). Structure and stability of Fe2C phases from density-functional theory calculations. Scripta Materialia. 63, 418-421.
• [6] Trepczyńska-Łent, M. (2013). Possibilities of the materials properties improvement for the cementite eutectic by means of unidirectional solidification. Archives of Metallurgy and Materials. 58(3), 987-991.
• [7] Senczyk D. (1974). Laboratory of X-ray crystallography. Poznań: Wydawnictwo Uczelniane Politechniki Poznańskiej 205 (in Polish).
• [8] www.msm.cam.ac.uk/phase-trans/2003/Lattices2/cementite. data.txt.
• [9] Battezzati, L., Baricco, M., Curiotto, S. (2005). Non-stoichiometric cementite by rapid solidification of cast iron. Acta Materialia. 53, 1849-1856.
• [10] Lv, Z.Q., Zhang, F.C., Sun, S.H. & other (2008). First-principles study on the mechanical, electronic and magnetic properties of Fe3C. Computational Materials Science. 44, 690-694.
• [11] Herbstein, F.H., Smuts, J. (1964). Comparison of X-ray and neutron-diffraction refinements of the structure of cementite Fe3C. Acta Crystallographica. 17, 1331-1332.
• [12] Stuart, H., Ridley, N. (1966). Thermal expansion of cementite and other phases. Journal of the Iron and Steel Institute. 711-717.
• [13] Trepczyńska-Łent, M. & Szykowny, T. (2015). X-ray diffraction study of directional solidification ledeburite. Archives of Foundry Engineering. 15(3), 71-76.

Uwagi

PL

Opracowanie ze środków MNiSW w ramach umowy 812/P-DUN/2016 na działalność upowszechniającą naukę.