636-0501/02 – Metals I (KOV I)
Gurantor department | Department of Material Engineering | Credits | 4 |
Subject guarantor | doc. Ing. Stanislav Lasek, Ph.D. | Subject version guarantor | doc. Ing. Stanislav Lasek, Ph.D. |
Study level | undergraduate or graduate | Requirement | Choice-compulsory |
Year | 2 | Semester | summer |
| | Study language | Czech |
Year of introduction | 2004/2005 | Year of cancellation | 2020/2021 |
Intended for the faculties | USP | Intended for study types | Bachelor |
Subject aims expressed by acquired skills and competences
- Define the meaning of investigations on structure and properties of technical materials;
- Characterise the crystal structure of metals and their alloys, define defects in crystals;
- Describe the fundamental mechanical tests;
- To define the basic technological tests;
- Describe the basic types of equilibrium binary phase diagrams;
- Characterise the binary diagrams in Fe-C system and classify iron based alloys;
- Outline the principles of heat treatment of metals and alloys;
- Characterisation of important non-ferrous metals and their alloys.
Teaching methods
Lectures
Tutorials
Experimental work in labs
Summary
The lectures offer the basic knowledges on chemical composition, structure,
properties and application of metals and alloys. First part of subject is
devoted to interatomic bonds and crystallic structure of metals. The second one
deals with influence of external forces on materials, with testing of
mechanical and technological properties of materials and is completed by
degradation processes (creep, fatigue, corrosion and wearing). Third one is
aimed at binary systems, ispecially, iron-carbon diagram, as teoretical basis
for understanding of steels a cast irons. In this field the students gain also
the knowledges about alloying, thermal treatment and properties of steels. The
next part of subject gives the informations about the non-ferrous metals
(mainly Al, Cu, Ni, Ti alloys), their properties and applications. The lectures
are extended to sintered and progressive metals, such as intermetallics, metal
glasses and composites. The last part is orientated into the materials design
according to the application purposes and sources of informations, standards
and databases. Explanation is completed by the case examples of materials in
technical practice. In connestion with lectures, the excercises have a
laboratory and control character.
Compulsory literature:
Recommended literature:
Way of continuous check of knowledge in the course of semester
Programs, tests, written assessment (see exercise)
E-learning
Sojka, J., Základy progresivních konstrukčních materiálů. VŠB-TU Ostrava, 2012, 194 s. (www.person.vsb.cz)
Callister, W. D., Materials Science and Engineering. An Introduction. John Wiley Sons, 2009, 721 p. (e-Textbook available on the Internet)
Other requirements
Other requirements for students
Compulsory participation in excercises, treatments of protocols for excercise by PC, support of protocols terms,
Prerequisities
Subject has no prerequisities.
Co-requisities
Subject has no co-requisities.
Subject syllabus:
Lectures:
1. Content of the course, the importance of metallic materials. Entering the literature. Basic distribution of materials, interatomic bonds. Crystallography, indexes of directions and planes.
2. Defects of the crystal lattice: points, curves and plane defects, their properties. The processes of diffusion, Fick's laws. Recovery and recrystallization, related diagrams.
3. The influence of external forces on the metals, mechanical stress and deformation (elastic, plastic), Hooke's law. Tensile test and basic mechanical properties.
4. Tests in compression, bending, torsion and shear. Mechanical properties at higher temperatures, creep and relaxation. Fatigue, wear and corrosion of metals.
5. Test methods of hardness, evaluation of notch and fracture toughness, transition temperatures. Cracks and fractures. Technological tests. Defectoscopy and diagnostics.
6. Crystallization of metals and alloys, related to thermodynamics and kinetics. Segregation, partition coefficients. Ingot structure, dendritic, polyhedral grains, stability of phases.
7. The basic types of binary diagrams, solubility and precipitation in alloys. Cooling curves, lever rule. Phase transformations (eutectic, peritectic, eutektoid, peritektoid.
8. Metastable equilibrium and a stable iron-carbon diagram (system). Equilibrium structures of steels and cast irons. The influence of alloying elements and impurities on the structure and properties of steels. Basics of steel production.
9. Technology of thermal treatment of steel: annealing, hardening, tempering. Pearlite, bainite and martensitic transformation of austenite. IRA and ARA diagrams. Effect of heat treatment on the properties of steels.
10. Thermo-chemical treatment of steels: carburizing, nitriding. Thermo- mechanical processing. Overview wrought construction steel and tool ones. Cast steel, cast iron. Marking of steels.
11. Non-ferrous alloys, especially Al, Cu, Ni, processing, properties and use. Marking of alloys according to standards.
12. Other non-ferrous metals: titanium, magnesium, low-melting metals, refractory metals, precious metals, intermetallics, metal glasses. Metal composite materials.
13. Sintered metals, advantages powder metallurgy. Production, preparation, compaction and sintering of powders. Important sintered materials, porous materials, metal-ceramic materials.
14. The main principles, procedures and criteria for selecting of metallic materials. The use of standards, manuals, databases. The economic and technical aspects of material selection.
Exercise:
1. Practice, the conditions for granting credit, the safety in laboratories. Crystallographic geometry, examples.
2. Tensile test and notch impact test. Program No. 1 (2-4 points).
3. Tests of hardness and technological tests. Program 2 (2-4 points)
4. Written control of study (of crystallography, testing and defectoscopy methods of metals).
5. Iron-carbon diagram, equilibrium structures typical of steels and cast irons, using metallographic microscope. Program No. 3 (2-4 points)
6. Selected non-ferrous metals, monitoring of the structure, grain size determination. Program No. 4 (2-4b.)
7. Test. Binary diagrams and steels. Credit.
Conditions for subject completion
Occurrence in study plans
Occurrence in special blocks
Assessment of instruction
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