| Course Unit Code | 636-3033/01 |
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| Number of ECTS Credits Allocated | 6 ECTS credits |
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| Type of Course Unit * | Compulsory |
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| Level of Course Unit * | Second Cycle |
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| Year of Study * | First Year |
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| Semester when the Course Unit is delivered | Winter Semester |
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| Mode of Delivery | Face-to-face |
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| Language of Instruction | Czech |
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| Prerequisites and Co-Requisites | There are no prerequisites or co-requisites for this course unit |
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| Name of Lecturer(s) | Personal ID | Name |
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| VOD37 | prof. Ing. Vlastimil Vodárek, CSc. |
| KUB014 | Dr. Ing. Zdeněk Kuboň |
| Summary |
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| The course deals with modern structural materials which are used in conventional power plants: thermal power plants and heating plants, gas power plants, nuclear power plants. Students will learn about their chemical composition, heat treatment procedures, structure, properties and consequences of degradation processes taking place under conditions of their practical exploitation in various conventional energy sources. Results of evaluation of service failures of structural components are demonstrated on case studies. |
| Learning Outcomes of the Course Unit |
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| Students will learn about structural materials which are used in various types of conventional power plants. They will be able to choose an appropriate structural material for the given loading pattern and parameters of working environment in individual types of power plants. They will be able to analyse and evaluate existing engineering solutions in the area of materials in conventional energy sources. |
| Course Contents |
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1. Basic structural components of conventional power plants: thermal power plants and heating plants, gas power plants and nuclear power plants. Trends of development of these energy sources.
2. Requirements on materials for important structural components of various energy sources. Basic structural materials: steels and nickel alloys, their classification.
3. Basic degradation mechanisms of materials under conditions of their applications in conventional energy sources: creep, low cycle fatigue, thermal embrittlement, corrosion, high temperature oxidation in steam, hydrogen embrittlement, stress corrosion cracking, cavitation, erosion, radiation damage.
4. Heat resistance of materials, evaluation of results of creep tests, exploitation of creep tests results at design of structural parts of conventional energy sources working in the creep regime. Interaction of creep and low cycle fatigue.
5. Plain carbon steels: chemical composition of most important steel grades, mechanical properties and structure in the as-received state, typical working parameters, the most important degradation mechanisms of carbon steels in conventional energy sources.
6. Low alloyed steels: chemical composition, the effect of heat treatment on structure and mechanical properties of these steels, typical working parameters, degradation mechanisms of low alloy steels.
7. Modern grades of modified 2.25CrMo(W) steels. The effect of heat treatment of T/P 23 and T/P 24 steels on structure evolution during quality heat treatment. The effect of service parameters on structural changes in these steels. Mechanical properties after quality heat treatment and their degradation during the long-term service at temperature of ca 550 °C. Homogeneous and heterogeneous welds and overlays.
8. Martensitic modified (9-12)%Cr steels: chemical composition of progressive steel grades, the effect of chemical composition on evolution of structure and mechanical properties during long-term exposure at temperature of ca 600 °C.
9. P/T 91 and P/T 92 steels: differences in constitution of steels, typical properties after quality heat treatment and after long term service, basic degradation mechanisms of these steels in various conventional energy sources, homogeneous and heterogeneous welds made of these steels, typical examples of applications of these steels in conventional power plants.
10. Modern heat resistant and refractory austenitic CrNi(Mo) steels for conventional energy sources, differences in constitution of these steels, typical mechanical properties after solution annealing, the effect of long-term service exposure in various conventional energy sources on structure and mechanical properties of these steels.
11. Basic characteristics of progressive austenitic steels grades: HR3C, 347 HFG and SUPER 304 H. Degradation mechanisms of these steels during long-term exposure at temperature of ca 650 °C. Homogeneous and heterogeneous welds and overlays. Typical examples of exploitation of these steels in conventional power plants.
12. Nickel alloys for conventional energy sources. Chemical composition, the effect of chemical composition on evolution of structure and mechanical properties during quality heat treatment, evolution of structure and mechanical properties under conditions of long-term exposure in various conventional energy sources. Homogeneous and heterogeneous welds and overlays.
13. Exploitation of structure parameters for evaluation of materials degradation in conventional energy sources. Tests for evaluation of local mechanical properties of exposed structural components.
14. Case studies of industrial failures of structural parts of conventional energy sources. Experiences with progressive grades of steels and nickel alloys in conventional energy sources.
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| Recommended or Required Reading |
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| Required Reading: |
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ABE, F., T. U. KERN a R. VISWANATHAN. Creep-resistant steels. Cambridge: Woodhead Publishing Ltd., 2011. ISBN 9781845694012 (e-book).
SHIRZADI, A. a S. JACKSON, Eds. Structural alloys for power plants. Operational challenges and high temperature materials. London: Elsevier, Ltd., 2014. ISBN 978-0-85709-238-0.
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KUBOŇ, Z. Materiály v konvenčních energetických zařízeních, Ostrava: VŠB–TU Ostrava, 2019.
JONŠTA, Z., A. HERNAS, M. TVRDÝ, L. ČÍŽEK a J. PURMENSKÝ. Žárupevné oceli a slitiny. Žilina: ZUSI, 2002. ISBN 8096860569.
ABE, F., T. U. KERN a R. VISWANATHAN. Creep-resistant steels. Cambridge: Woodhead Publishing Ltd., 2011. ISBN 9781845694012 (e-book).
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| Recommended Reading: |
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| WENG, Y., H. DONG a Y. GAN, Eds. Advanced steels. The recent scenario in steel science and technology, Berlin: Spinger Verlag, Metallurgical Industry Press, 2011. ISBN 978-3-642-17664-7. |
ČADEK, J. Creep kovových materiálů. Praha: Academia, 1984.
KUBOŇ, Z. Precipitace sekundárních fází a jejich vliv na žárupevnost modifikovaných chromových ocelí. Disertační práce, Ostrava: VŠB - TU Ostrava, 1998.
VODÁREK, V. Fyzikální metalurgie modifikovaných (9-12)%Cr ocelí. Ostrava: VŠB-TU Ostrava, 2003.
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| Planned learning activities and teaching methods |
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| Lectures, Seminars, Tutorials, Experimental work in labs |
| Assesment methods and criteria |
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| Task Title | Task Type | Maximum Number of Points
(Act. for Subtasks) | Minimum Number of Points for Task Passing |
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| Credit and Examination | Credit and Examination | 100 (100) | 51 |
| Credit | Credit | 35 | 21 |
| Examination | Examination | 65 | 30 |