| About this Abstract |
| Meeting |
MS&T24: Materials Science & Technology
|
| Symposium
|
Austenite Formation and Decomposition V: A Symposium in Memory of Prof. Mats Hillert
|
| Presentation Title |
Austenite Nucleation from Ferrite and Cementite in Steels Alloyed with Mn and Si |
| Author(s) |
Erik Offerman, Monika Krugla, Dave Hanlon, Jilt Sietsma |
| On-Site Speaker (Planned) |
Erik Offerman |
| Abstract Scope |
We study the formation of austenite from ferrite and cementite in steels with varying concentrations of silicon (Si) and manganese (Mn), in the range between 0 and 2 wt.%. The addition of Mn allows for the presence of Si in cementite. This in turn affects the way in which the pearlite transforms and the austenite nuclei form. As a consequence, with the addition of Si in alloys with 2 wt.% Mn, the carbon concentration in austenite nuclei increases significantly. The volumetric misfit is affected by this as well. The classical nucleation theory that is used in the present work accounts for effects of the chemical driving force and strain energy between the austenite nucleus and both matrix phases. The present work shows that some results can be explained with the classical nucleation theory, whereas other results are ambiguous and need further consideration. |