Dislocations and Plastic Deformation (FSI-WDD)

Academic year 2026/2027
Supervisor: prof. Mgr. Tomáš Kruml, CSc.  
Supervising institute: ÚMVI all courses guaranted by this institute
Teaching language: Czech
Course type: departmental course
Aims of the course unit:

The course concentrates on explaining the essence of the mechanical properties of metallic and non-metallic substances, in dependence on the faulted crystal lattice. Information is provided about the mechanisms of plastic deformation in single-crystal and polycrystalline materials, deformation textures, and strain hardening. In the exercises, students learn the experimental methods for studying plastic deformation.
The knowledge of the processes of plastic deformation in crystals. Relation between sub-microscopic events in solids and macroscopic manifestation of these events - i.e. changes in mechanical properties.
Learning outcomes and competences:
 
Prerequisites:

Atomic bonds, fundamentals of crystallography, crystallographic systems, crystal symmetry, crystal lattice defects, crystalline structure of solid solutions and intermediate phases in metallic and ceramic systems.
Course contents:

Under the link Textbooks, one can find and download teaching texts and presentations that references to additional study materials.
Teaching methods and criteria:
 
Assesment methods and criteria linked to learning outcomes:

Credit:
The condition for obtaining credit is the attendance at of exercises and written assignments of some chosen tasks. Exercises are mandatory. Absence from exercises must be excused. In case of absence, the student will receive a substitute assignment and must prove that he/she has mastered the given topic in the form of a written report.

Exam:

The exam has a written and an oral part. A credit is required to take the exam. The written part includes some examples and a test of knowledge of concepts. Students may not use any materials or devices except a calculator. The oral part may contain questions for which the student will be given time to prepare; however, it is primarily a test of the student's knowledge and orientation in the form of several questions with answers without preparation.
Controlled participation in lessons:
 
Type of course unit:
    Lecture  13 × 2 hrs. optionally                  
    Laboratory exercise  13 × 2 hrs. compulsory                  
Course curriculum:
    Lecture 1. Crystallography of plastic deformation
2. Theory of critical slip stress
3. Process of strain hardening
4. Plastic deformation of non-metallic crystals
5. Dislocations
6. Slip plane, conservative and non-conservative motion of dislocations
7. Distribution of dislocations
8. Interaction between dislocations
9. Dislocations and grain boundaries (the Haal-Petch relation)
10. Dislocation sources
11. Partial dislocations
12. Stacking faults and their significance
13. Dislocations and allotropic transformation
14. Concluding the course and summarizing the most significant items of knowledge
    Laboratory exercise 1. Stereographic projection, orientation of crystals. 2. Reciprocal lattice (definition, application). 3. Radiographic methods of studying crystal orientation. 4. Methods for studying textures, pole figures. 5. Electron diffractography. 6. Methods for establishing dislocation density. 7. Metallography of dislocation substructure.
Literature - fundamental:
2. Smallman R.E., Bishop R.J.: Metals and Materials, , 0
Literature - recommended:
1. Ptáček L., Just D., Švejcar J.: Physics of metals (in Czech), , 0
2. Strnadel B.: Examples with solutions and technical problems from materials engineering (in Czech), , 0
The study programmes with the given course:
Programme Study form Branch Spec. Final classification   Course-unit credits     Obligation     Level     Year     Semester  
N-MTI-P full-time study --- no specialisation -- Cr,Ex 5 Compulsory 2 1 S
C-AKR-P full-time study CLS -- Cr,Ex 5 Elective 1 1 S