Modeling of the interlamellar spacing of isothermally formed pearlite in a eutectoid steel
Pearlite is a lamellar product of eutectoid decomposition, which may form in steels and non-ferrous alloys during transformations under isothermal or continuous-cooling. A pearlite nodule is composed of multiple colonies; each colony has parallel lamellae, which are oriented differently with respect to lamellae in adjacent colonies. This also exhibits a wide range of interlamellar spacings in different colonies because of the intersection of pearlite colonies at different angles with the polishing plane. In the present work, three different morphologies of pearlite were formed isothermally at three temperatures in a eutectoid steel finding out, as Mehl et al. and Zener reported, that the pearlite is finer as the formation temperature decreases. Moreover, the interlamellar spacings were calculated using the theoretical method proposed by Zener and Hillert. Experimental results suggest that the growth of pearlite is controlled mainly by volume diffusion of carbon in austenite in the temperature range studied in this steel.
- Research Organization:
- Centro Nacional de Investigaciones Metalurgicas, Madrid (ES)
- OSTI ID:
- 20023177
- Journal Information:
- Scripta Materialia, Vol. 42, Issue 6; Other Information: PBD: Feb 2000; ISSN 1359-6462
- Country of Publication:
- United States
- Language:
- English
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