Austenite Grain Size Estimtion from Chord Lengths of Logarithmic-Normal Distribution

• Autorzy: Adrian H. , Wiencek K.

Identyfikatory

DOI

10.1515/amm-2017-0300

• Języki publikacji: EN

Abstrakty

EN

Linear section of grains in polyhedral material microstructure is a system of chords. The mean length of chords is the linear grain size of the microstructure. For the prior austenite grains of low alloy structural steels, the chord length is a random variable of gamma- or logarithmic-normal distribution. The statistical grain size estimation belongs to the quantitative metallographic problems. The so-called point estimation is a well known procedure. The interval estimation (grain size confidence interval) for the gamma distribution was given elsewhere, but for the logarithmic-normal distribution is the subject of the present contribution. The statistical analysis is analogous to the one for the gamma distribution.

Słowa kluczowe

EN

austenite grain size; linear section methods; modelling

• 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: 2017
• Tom: Vol. 62, iss. 4
• Strony: 2015--2019
• Opis fizyczny: Bibliogr. 17 poz., rys., tab., wykr., wzory

Twórcy

autor

Adrian H.

• AGH University of Science and Technology, Al. A. Mickiewicza 30, 30-059 Krakow, Poland

autor

Wiencek K.

• AGH University of Science and Technology, Al. A. Mickiewicza 30, 30-059 Krakow, Poland

Bibliografia

• [1] T. Gladman, The Physical Metallurgy of Microalloyed Steels, The Institute of Materials, 1998.
• [2] C. S. Smith, Grains, Phases and Interfaces: An Interpretation of Microstructure, Trans. AIME 175, 15-31 (1948).
• [3] J. G Speer, J.R Michael, S.S. Hansen, Carbonitride Precipitation in Niobium/Vanadium Microalloyed Steels, Met. Trans. A 18A, 211-222 (1987).
• [4] H. Adrian, Thermodynamic model for precipitation of carbonitrides in high strength low alloy steels containing up to three microalloying elements with or without additions of aluminium, Materials Science and Technology 8, 406-420 (1992).
• [5] M. Perez, M. Dumont, D. Acevedo-Reyes, Implementation of classical nucleation and growth theories for precipitation; Acta Materialia 56, 2119-2132 (2008).
• [6] P. Maugis, M. Gouné, Kinetics of vanadium carbonitride precipitation in steel: A computer model, Acta Materialia 53, 3359-3367 (2005).
• [7] H. Adrian, J. Augustyn-Pieniążek, P. Marynowski, P. Matusiewicz, Model of carbonitride precipitation kinetics in HSLA steels, Metallurgist, 81/4, 208-214, 2014. (in Polish)
• [8] J. Ryś, Stereology of materials. Fotobit, Kraków 1995 (in Polish).
• [9] H. Schumann, H. Oettel, Metallographie, 14-th ED. Willey – VCH, Weinheim, 2005.
• [10] H. Adrian, K. Wiencek, Austenite grain size estimation in structural steels by linear section method. Archives of Metallurgy and Materials 60, 2463-2469 (2015).
• [11] R. Staśko, PhD Thesis, AGH, Kraków 2007.
• [12] R. Staśko, H. Adrian, A. Adrian, Effect of nitrogen and vanadium on austenite grain growth kinetics of a low alloy steel. Mater. Char. 56, 340-347 (2006).
• [13] H. Adrian, E. Głowacz, The effect of nitrogen and microalloying elements (V and V+Al) on austenite grain growth of 40Cr8 steel, Archives of Metallurgy and Materials 55, 107-116 (2010).
• [14] J. Krawczyk, H. Adrian, The kinetics of austenite grain growth in steel for wind power plant shafts, Archives of Metallurgy and Materials 55, 91-100 (2010).
• [15] H. Adrian, M. Pelczar, A. Adrian, J. Augustyn-Pieniążek, The effect of B and microalloying elements (V, Ti, Nb) additions on the austenite grain growth of low alloy steel, Solid State Phenomena 197, 25-32 (2013).
• [16] E. Głowacz, H. Adrian, W. Osuch, Nitrogen content effect on carbonitride coagulation in 40Cr8 steel with micro-additions V and V+Al, Archives of Metallurgy and Materials, 59, 609-613 (2013).
• [17] PN-84/H-04507: Standards for determination of the grain size.

Uwagi

EN

The main parts of this paper were presented at X Stermat Conference,1-4 June 2016 in Białka Tatrzańska (Poland). The financial support work within the AGH project 11.11.110.299 is gratefully acknowledged.

PL

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