| 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 |
F-1: Role of Cerium on Transformation Kinetics and Mechanical Properties of Low Carbon Steels |
| Author(s) |
Chetan Kadgaye |
| On-Site Speaker (Planned) |
Chetan Kadgaye |
| Abstract Scope |
The present study has focused on detailed dilatometric and electron microscopic analysis of formation of austenite and its decomposition in two Cerium (Ce) modified steels containing 0.6 and 0.03 wt. pct. Ce. Despite a long incubation time, the austenite formation is very fast in high-Ce steel (0.6 wt. pct. Ce) during heating. Whereas the low-Ce steel (0.03 wt. pct. Ce) promotes early nucleation of austenite but shows a significant delay in the completion of the transformation. Similar trend has been observed for the decomposition of austenite during cooling; the low-Ce steel shows early start of transformation with a sluggish kinetics. The role of Ce on the overall transformation kinetics of austenite during the heating–cooling cycle has been investigated and discussed from thermodynamic viewpoint and nucleation probability. Engineering stress–strain curves have shown a better combination of strength and ductility in the low-Ce steel compared to the high-Ce one. |