Interpretations of Cooling Dilatograms in the Range of the Bainitic and Martensitic Transformations/ Intwerpretacja Dylatogramów Chłodzenia W Zakresie Przemiany Bainitycznej I Martenzytycznej

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The method of interpretation of cooling dilatograms of undercooled austenite during its transformation into upper and lower bainite (UB and LB) and into martensite (M), applied in the Laboratory of Phase Transformations of AGH University of Science and Technology in Krakow, is presented in the hereby paper. The relation of the mechanism of the mentioned above transformations to places on the dilatometric curve where transformations start and where they are continued was indicated. An appeal for the unified, correct interpretation of dilatograms of phase transformations, in all laboratories of the world, was formulated. This will allow the formation of equally accurate diagrams of the kinetics of phase transformation of undercooled austenite at its continuous cooling (CCT). In consequence, this could provide a development of more advanced heat treatment technologies. Such approach will also allow for the correct assessment of the influence of the alloying elements on the stability of austenite and phase transformation temperatures at its cooling.

[1] J. Pacyna, Designing of chemical composition of steels Ed. Metallurgy and Materials Engineering Dept., Academy of Mining and Metallurgy, Kraków (1997).

[2] R.J. Entin, Transformations austenite in steels’, Metallurgizdat, Moscow (1960).

[3] L.A. Dobrzanski, Engineering of materials and its designing. Ed. WNT, Warsaw (2006).

[4] H.K.D.H. Bhadeshia, Bainite in steels, 2nd edition, Institute of Materials, Cambridge (2001).

[5] M. Karamara, A. Mazuret al., Metallurgy and casting 7, 329-340 (1981).

[6] J. Pacyna, Computer designing of steels and alloys. Ed. AGH Academy of Mining and Metallurgy, Kraków (2011).

[7] W. Swiatnicki, K. Pobiedzinska et al., Mater Eng 33, 6, 524-529.

[8] J. Mahieu, J. Makiet al., Metall Mater Trans A 33A, 2573-2580 (2002).

[9] C. Garcia et al., Application of dilatometric analysis to the study of solid-solid phase transformations in steels, Materials Characterization 48, 101-111 (2002).

[10] T. Sourmail, V. Somanio, Determination of MS temperature: methods, meaning and influence of “slow start” phenomenon, MST 29, 883-888 (2013).

[11] Discussion with the above paper by H.K.D.H. Bhadeshia: MST 30, 510 (2014).

Archives of Metallurgy and Materials

The Journal of Institute of Metallurgy and Materials Science and Commitee on Metallurgy of Polish Academy of Sciences

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