Paper 6.4

Practical aspects of thermodynamic calculations

 

Janovec J.1, Jenko M.1 and Homolová V.2

 

1 Institute of Metals and Technology, Ljubljana, Slovenia

2 Institute of Materials Research, Slovak Academy of Sciences, Košice, Slovakia

 

Practical aspects of thermodynamic calculations were demonstrated on the Ch12MF4, Ch3F12, and CF3M alloys cast under quasi-equilibrium conditions. Good agreement was achieved between experimental findings [1,2] and thermodynamic predictions performed by THERMOCALC using the non-commercial database STEEL16 [3]. The used approach was found to be eligible for solution of practical tasks related to casting (solidification).

 

 

Micrograph of as-cast hypoeutectic tool alloy Ch12MF4. Transformed proeutectic austenite is marked with the solid arrow, products of eutectic reaction with the dashed arrow.

 

 

Calculated volume fractions of liquid, austenite, MC, and M7C3 as a function of temperature. The calculations were performed by THERMOCALC using database STEEL16. Diagram is referred to tool alloy Ch12MF4.

 

 

 

References

 

1.        HOMOLOVÁ, V. –  JANOVEC, J. – KUSÝ, M. –  MORAVČÍK, R. – ILLEKOVÁ, E. – GRGAČ, P.: Can. Metall. Quart., 42, 2003, 89.

2.        JANOVEC, J. – ŠUŠTARŠIČ, B. – MEDVED, J. – JENKO, M.: Mater. Technol., 37, 2003, 307.

3.        KROUPA, A. – HAVRÁNKOVÁ, J. – COUFALOVÁ, M. – SVOBODA, M. – VŘEŠŤÁL, J.: J. Phase Equi., 22, 2001, 312.