SOME ASPECTS OF ESTIMATION ACCURACY OF MEAN TRUE INTERLLAMELAR SPACING
DOI:
https://doi.org/10.7494/mafe.2012.38.2.133Keywords:
true interllamelar spacing, lamellar microstructure, stereologyAbstract
Lamellar microstructures are characterized by interlamellar spacings: random, apparent and true. The mean value of true interlamellar spacing can be estimated by measurements of apparent spacings, random spacings or by counting number of intersections the secant with plates. In this paper the statistical errors in true interlamellar spacing measurements has been determined and discussed using the example of pearlite in eutectoid steel. The accuracy of estimation of true interlamellar spacing using all the methods is comparable and sufficient.
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References
Hillert M.: The formation of pearlite, in: V.F. Zakay, H.I. Aaronson (Eds.), Decomposition of austenite by diffusional processes, New York, NY Interscience, 1962, pp. 197-237
Hackney S.A., Shiflet G.J.: Pearlite growth mechanizm. Acta Metall., 35 (1987) 1019-1028
Doi S.N., Kestenbach H-J.: Determination of the pearlite nodule size in eutectoid steels. Metallography, 23 (1989) 135-146
Underwood E.E.: Quantitative Stereology. Addison-Weseley, 1970
DeHoff R.T., Rhines F.N.: Quantitative Microscopy. New York, McGraw-Hill, 1968
Vander Voort G.F., Roosz A.: Measurement of the interlamellar spacing of pearlite. Metallography, 17 (1984) 1-17
Ikeda T., Ravi V.A., Snyder G.J.: Evaluation of true interlamellar spacing from microstructural observations. Journal of Materials Research, 23 (2008) 2538-2544
Elwazri A.M., Wanjara P., Yue S.: Measurement of pearlite interlamellar spacing in hypereutectoid steel. Materials Characterization, 54 (2005) 473-478
Matusiewicz P., Czarski A., Adrian H.: Quantitative Microstructure Analysis with SigmaScanPro. Proc. of 9th ECSIA & 7th Stermat, (2005) 131-138
Czarski A., Głowacz E.: Relationship between mean values of interlamellar spacings in Case of Lamellar Microstructure Like Pearlite. Archives of Metallurgy and Materials, 55 (2010) 101-105
Lafond C., Moliexe F.: Some metallurgical applications of stereometry, Practical Metallography, spec. iss., 5 (1975) 200-223
Camard P., Chermant J.L., Coster M.: Morphology of an imbricate structure. Practical Metallography, spec. iss. 8 (1978) 126-132
Stiebler K., Otte B., Frebel M., Nembach E.: Investigation of periodic lamellar substructures by laser beam diffraction. Mat. Sc. and Eng., 56 (1982) 203-209
Fitta G.: Diffraction method for quantitative analysis of platelet-type structures (in Polish). AGH – Wydz. Metalurgiczny, Kraków, 1985 (PhD thesis)
Gensamer M., Pearsall E.B., Pellini W.S., Low J.R.: Tensile properties of pearlite, bainite and spheroidite. Trans. ASM, 30 (1942) 983-1020
Saltykov S.A.: Stereometric Metallography. 3rd Edition, Metallurgia, Moscow, 1970
Ryś J., Czarski A.: Quantitative analysis of lamellar structure. Proc. of IV Symposium on Metallography, Vysoke Tatry, Czechoslovakia, 1 (1986) 25-30
Czarski A., Ryś J.: Stereological realitonships for lamelar structure. Acta Stereologica, 6 (1987) 567-572
Chattopadhyay S., Sellars C.M.: Quantitative measurements of pearlite spheroidization. Metallography, 10 (1977) 89-105
Chojnowski E.A., Tegart W.J.: Accelerated spheroidization of pearlite. Metal Sc. J., 2 (1968) 14-18