| About this Abstract |
| Meeting |
2020 TMS Annual Meeting & Exhibition
|
| Symposium
|
Hume-Rothery Symposium: Thermodynamics, Phase Equilibria and Kinetics for Materials Design and Engineering
|
| Presentation Title |
Thermodynamic Assessment of the Fe-B and Fe-B-C- Systems |
| Author(s) |
Katsunari Oikawa, Nobufumi Ueshima |
| On-Site Speaker (Planned) |
Katsunari Oikawa |
| Abstract Scope |
Born is added to improve the mechanical strength through enhancement hardenability by segregation to grain boundary. While, boron forms the borocabide as well as boride in the steels. These precipitates have harmful effect on the mechanical properties. To understand the behavior of boron and carbon in the steel, phase diagrams of Fe-B-C system are essential information.
In this study, the phase equilibrium of the Fe-B and Fe-B-C systems were investigated using diffusion couple method and DSC. Furthermore, thermodynamic assessment of these systems was carried out by using the CALPHAD method. In the Fe-B-C system, the solubility of carbon in liquid and fcc phases was decreased with increasing boron content. The assessment also predicted the metastable two-liquid phase separation in Fe-Fe2B region. This phase separation might be the origin of two-phase separation of the Fe-B base amorphous. These results are very useful to understand the effects of boron on the steel. |
| Proceedings Inclusion? |
Undecided |