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Effect of prior austenite grain size on pearlite transformation in A hypoeuctectoid Fe-C-Mn steel

AutorAranda, M. M.; Kim, B.; Rementería, Rosalía; Capdevila, Carlos; García de Andrés, Carlos
Palabras claveAGS
Pearlite transformation
Austenite
Isothermal decomposition
Fecha de publicación2014
EditorSpringer
CitaciónMetallurgical and Materials Transactions A: Physical Metallurgy and Materials Science 45 (4): 1778-1786 (2014)
ResumenThe aim of this work is to evaluate the influence of the prior austenite grain size (AGS) on the austenite-to-pearlite isothermal decomposition in a Fe-C-Mn hypoeutectoid steel. Due to the strong influence, grain boundaries have on pearlite transformation kinetics, morphological aspects of pearlite from two conditions with very different AGS were studied and characterized. Results allow us to conclude that the formation of pearlite and ferrite are favored for small AGS values, whereas a larger AGS led to an increase in the total amount of pearlite volume fraction. Furthermore, the average size of pearlitic colonies increased with increasing AGS, and it appears that the interlamellar spacing of the pearlite does not depend on AGS, but instead, is controlled by the isothermal decomposition temperature. Finally, it was observed that the ratio between lamellar thickness of ferrite and cementite depended on AGS.
URIhttp://hdl.handle.net/10261/111804
DOI10.1007/s11661-013-1996-0
Identificadoresdoi: 10.1007/s11661-013-1996-0
issn: 1543-1940
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