636-2015/02 – Material testing and degradation mechanisms (ZMMD)
| Gurantor department | Department of Material Engineering | Credits | 4 |
| Subject guarantor | prof. Ing. Bohumír Strnadel, DrSc. | Subject version guarantor | prof. Ing. Bohumír Strnadel, DrSc. |
| Study level | undergraduate or graduate | Requirement | Choice-compulsory type B |
| Year | 3 | Semester | winter |
| | Study language | English |
| Year of introduction | 2019/2020 | Year of cancellation | 2022/2023 |
| Intended for the faculties | USP, FS | Intended for study types | Bachelor |
Subject aims expressed by acquired skills and competences
Student will be able:
- to characterize principal methods of materials testing to evaluate materials properties;
- to describe the most important mechanisms of material degradation;
- to choose appropriate methods to evaluate resistance of materials to degradation processes.
Teaching methods
Lectures
Seminars
Tutorials
Experimental work in labs
Summary
Basic mechanical tests of engineering materials in relationship with the action of various degradation processes. Principal kinds of engineering materials failure. Testing of mechanical overloading in the case of ductile fracture. Principles and testing of resistance to fatigue failure, creep, corrosion, stress corrosion cracking and to basic mechanisms of wear of functional surfaces. Methods of evaluation of experimental results and their interpretation.
Compulsory literature:
[1] CALLISTER D. W., Materials Science and Engineering. An Introduction. University Iowa, John Wiley Sons, 2007,721.
Recommended literature:
[1] FELBECK, D. K., ATKINS A.G.: Strength and Fracture of Engineering Materials. Prentice Hall, Englewood, 1984, 542 s.
Way of continuous check of knowledge in the course of semester
Continuous verification of learning outcomes:
full-time study form - 2 written tests, 2 written programs during semester;
combined study form - 1 semestral project.
Final verification of study results:
written exam.
E-learning
Other requirements
There are no additional requirements.
Prerequisities
Subject has no prerequisities.
Co-requisities
Subject has no co-requisities.
Subject syllabus:
1. Importance of material testing. Tensile test, evaluation of principal characteristics; hardness testing.
2. Methods of toughness evaluation. Definition of toughness; influence of loading rate; influence of stress concentration; notch toughness test; temperature dependence of toughness, relation to the structure.
3. Material degradation during service. Principles of degradation, high/low energy fractures. Mechanism of ductile fracture, mechanisms of brittle fracture.
4. Fracture mechanics. Basic principles, elastic solution – Griffith’s relation; elastic-plastic solution – Griffith-Orowan’s relation; stress intensity factor; fracture toughness.
5. Fatigue of materials. Cyclic stress and strain; initiation and growth of fatigue cracks; life curves; factors influencing resistance to fatigue; methods of evaluation of resistance to fatigue damage.
6. Corrosion degradation of materials. Electrochemical corrosion; anodic/catodic reactions; Pourbaix’s diagrams; Faraday’s law, corrosion rate; passivity of metals; local corrosion; methods of evaluation of materials resistance to corrosion.
7. Creep degradation of materials. Influence of stress and temperature; the most important creep mechanisms; Larson-Miller parameter; methods of evaluation and extrapolation of experimental data.
8. Wear of materials. Adhesive, abrasive, erosive wear; main parameters; materials testing.
9. Radiation degradation of materials. Radiation strengthening/embrittlement; photo degradation of polymers.
10. Non-destructive material testing.
Conditions for subject completion
Occurrence in study plans
Occurrence in special blocks
Assessment of instruction
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