Czech

Not applicable.

Students will have acquired information about the crystallization process of foundry alloys and a grasp of the current possibilities of controlling this process, with the aim of obtaining castings of required structure and properties.

Students must have the knowledge of the thermodynamics and kinetics of phase transformations (diffusion, phase equilibrium diagrams, phase transformations and their effect on structure and properties), and thermomechanics (stationary and non-stationary transfer of heat by conduction, internal sources).

Not applicable.

The course is taught through tuition explaining the basic principles and theory of the discipline.

The examination consists of a written and an oral part. In the written part the knowledge of sets of topics is tested, which the students were made familiar with in lectures. The oral part serves to test individual items of knowledge and to provide for correct marking.

Not applicable.

Not applicable.

The course objective is to make students familiar with the basic processes taking place during the crystallization of foundry alloys. Emphasis is on a purposeful control of these processes, thus leading to castings of required structure and properties.

Not applicable.

Not applicable.

Not applicable.

Flemings, M.C.: Solidification Processing. 1st ed. New York: McGraw-Hill Book Company. 1974
Nobuo Sano ed.: Advanced Physical Chemistry for Process Metallurgy. 1st ed. San Diego: Academic Press. 1997
Karlsson, L.: Modeling in Welding, Hot Powder Forming and Casting. 1st ed. Materials Park, Ohio: ASM International. 1997
Stefanescu, D.M.:Science and Engineering of Casting Solidification. 1st ed. New York: Kluwer Academic/Plenum Publishers. 2002

Not applicable.

20 hours, optionally

1. Thermodynamics of crystallization.
2. Three distinct zones with different grain structures in the macrostructure of castings, a survey of the theories explaining their appearance.
3. The nucleation phase of crystallization, nucleation rate, model of homogeneous nucleation, heterogeneous nucleation on a planar substrate.
4. Models of heterogeneous nucleation in the cavities of refractories.
5. The phase of crystal growth, heat transport at the interface and in the mould/casting system.
6. Transport of mass at the interface, appearance of segregation
7. Constitutional supercooling, morphology of phase interface.
8. Control of metal crystallization, dynamic methods, melt modification.
9. Crystallization control in the phase of crystal growth, single crystals.
10. Crystallization of the basic types of foundry alloys.