| About this Abstract |
| Meeting |
MS&T24: Materials Science & Technology
|
| Symposium
|
Steels for Sustainable Development III
|
| Presentation Title |
Modelling of Phase Transformations During Laminar Cooling of a TMCP Microalloyed X70 Steel |
| Author(s) |
Ry Karl, Jonas Valloton , J. Barry Wiskel, Chad Cathcart, Tihe (Tom) Zhou, Fateh Fazeli , Hani Henein |
| On-Site Speaker (Planned) |
Tihe (Tom) Zhou |
| Abstract Scope |
An integrated thermal-phase transformation model was developed to predict the effect of laminar cooling on the through thickness microstructure of a microalloyed X70 steel skelp. A thermal finite element model of an industrial laminar cooling system was developed to predict through thickness skelp temperature profiles. This was followed by microstructure modelling of dilatometer samples with cooling rates ranging from 1 - 120 ℃/s. Scanning electron microscopy (SEM) and electron backscattered diffraction (EBSD) were used to quantify the type and fraction of phase(s) observed. The dilatometer phase transformation data was then integrated into a series of austenite decomposition contours used to predict phase fractions of ferrite, acicular ferrite and bainite for any temperature profile encountered in the laminar cooling system. Validation of the integrated model was done through comparison between predicted and measured phase fractions of two industrially produced X70 samples with varying chemistries and temperature profiles, and they compared favorably. |