636-2008/01 – Basics of damage processes (ZDPn)
| Gurantor department | Department of Material Engineering | Credits | 5 |
| Subject guarantor | doc. Ing. Stanislav Lasek, Ph.D. | Subject version guarantor | doc. Ing. Stanislav Lasek, Ph.D. |
| Study level | undergraduate or graduate | Requirement | Compulsory |
| Year | 3 | Semester | winter |
| | Study language | Czech |
| Year of introduction | 2014/2015 | Year of cancellation | |
| Intended for the faculties | FMT | Intended for study types | Bachelor |
Subject aims expressed by acquired skills and competences
The course objective is to familiarize students with problems of production and operation degradations in engineering materials. The course will provide students with the basic information on production and operation degradation in engineering materials. Students will learn to regard material as a chemically and structurally heterogeneous body, whose states can be greatly affected by exploitation conditions. Students should be able to assess the effect of the technologies used as well as of the conditions of exploitation on the properties of the materials of component parts and structures.
Teaching methods
Lectures
Tutorials
Experimental work in labs
Summary
The course is aimed at basic knowledge of damage processes in materials. Lectures are devoted to brittle and ductile fracture, fatigue, creep, corrosion damage and wear of surface materials. Knowledge of the basic mechanisms of degradation processes is exercised in solving technical.
Compulsory literature:
Recommended literature:
Way of continuous check of knowledge in the course of semester
E-learning
Other requirements
There are no further special requirements.
Prerequisities
Subject has no prerequisities.
Co-requisities
Subject has no co-requisities.
Subject syllabus:
. Introductory lecture. Manufacturing and service degradation. Limit States of Materials. Damage of major material groups.
2. Production degradation, metallurgy, chemical and structural heterogeneity, impurities segregation. Degradation of welded joints.
3. Stress and strain. Ductile, high-energy fractures, damage during plastic deformation, breach of overload.
4. Brittle fractures, fracture mechanics principles, low-energy fractures, influences of composition and structure of the material.
5. Fatigue process, cyclic stresses. Initiation and propagation of cracks, life curves (SN). Methods for testing.
6. Factors affecting the fatigue life, notches, surface conditions and environment. Life prediction, the solution of selected problems.
7. Fundamentals of creep (creep) materials. Effects of stress and temperature. Main mechanisms of creep.
8. Methods of testing and extrapolation of data creep. Larson-Miler parameter estimates lifetime, creep resistant alloys
9. Introduction to electrochemical corrosion, anodic and cathodic reactions, E-pH diagrams, Faraday's law, the rate of corrosion, passivity of metals, local types of corrosion,
10. Oxidation at high temperatures in gases, the effect of hydrogen, methods of protection against corrosion, heat-resistant steels and alloys. Stress corrosion cracking and hydrogen embrittlement.
11. Basics of wear surfaces, adhesive, abrasive and erosive wear, the main parameters, the possibility of testing
12. Surface damage during cavitation, contact fatigue and wear corrosion (fretting). Main factors and ways of protection.
13. Radiation damage, interaction of radiation with material, radiation hardening and embrittlement of materials. The photo-degradation of polymers.
14. Combined effects of certain degradation processes. Introduction to the analysis of damage. Examples from practice. Monitoring.
Conditions for subject completion
Occurrence in study plans
Occurrence in special blocks
Assessment of instruction