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Thermally Activated Processes in Materials - NFPL160

Title:	Tepelně aktivované procesy v materiálech
Guaranteed by:	Department of Physics of Materials (32-KFM)
Faculty:	Faculty of Mathematics and Physics
Actual:	from 2016
Semester:	winter
E-Credits:	3
Hours per week, examination:	winter s.:2/0, Ex [HT]
Capacity:	unlimited
Min. number of students:	unlimited
4EU+:	no
Virtual mobility / capacity:	no
State of the course:	taught
Language:	Czech
Teaching methods:	full-time
Teaching methods:	full-time

Guarantor:	doc. Dr. rer. nat. Robert Král, Ph.D.

Opinion survey results Examination dates WS schedule Noticeboard

Annotation -

Last update: doc. Dr. rer. nat. Robert Král, Ph.D. (17.02.2013)

Hardening and softening, recovery, climb, creep, superplasticity, radiation demage

Course completion requirements -

Last update: doc. Dr. rer. nat. Robert Král, Ph.D. (09.06.2019)

Final examination has to be passed.

Literature - Czech

Last update: doc. Dr. rer. nat. Robert Král, Ph.D. (17.02.2013)

J.F. Humphreys, M. Hatherly, Recrystallization and related annealing phenomena. Pergamon Press, Oxford 1996.

J. Čadek, Creep kovových materiálů. Academia, Praha 1984.

Requirements to the exam -

Last update: doc. Dr. rer. nat. Robert Král, Ph.D. (09.06.2019)

Requirements for the exam correspond to the annotation.

The exam is oral.

Syllabus -

Last update: prof. RNDr. Zuzanka Trojanová, DrSc. (22.09.2006)

1. Recovery of point defects. Influence of the point defects on physical properties of solids. Recovery spectra, recovery stages, recovery kinetics.

2. Recovery of dislocation substructure. Climb of dislocations. Polygonisation.

3. Softening. Evolution equation for dislocation density (mobile dislocations, forest dislocations). Influence of hardening and softening mechanisms on the development of dislocation substructure. Phenomenological models of the work hardening coefficient.

4. Recrystallisation. Static and dynamic recrystallisation. Models of nucleation. Migration of grain boundaries, grain and subgrain growth. Recrystallisation of pure metals and alloys. Models of dynamic recrystallisation.

5. High temperature creep. Stress and temperature dependences of the steady-state strain rate. Influence of grain boundaries and stacking fault energy. Creep in pure metals, solid solutions and precipitation and dispersion strengthen alloys. Creep controlled by recovery and climb. Dislocation models of the creep. Models of diffusion creep.

6. Hardening after irradiation. Influence of the irradiation by high energetic particles on deformation behaviour. Influence of thermal treating after irradiation on mechanical behaviour. Interaction of dislocations with the radiation defects. Models of hardening and creep.

7. Superplasticity. Characterisation of the superplastic behaviour, influence of experimental conditions and microstructure on the superplastic behaviour. Superplasticity of alloys, ceramic materials, intermetallics and composites.