• Semester 2, position 4

After successfully attending the course, consisting of theoretical lectures on Engineering Materials 1, as well as maximal commitment in the practical topics of the course (through laboratory and problem solving exercises), the students become competent in the fundamentals of engineering materials, thus acquiring certain academic skills. By developing creativity and mastering specific skills that are necessary in the field of mechanical engineering, the students will gain an understanding of the structure of materials, their properties, applications and the possibilities for processing and altering their chemical, physical and technological properties.

Upon the successful completion of the course, students are able to: • Identify the type of chemical bonding, crystal structure, and properties for a given type of material (metal, ceramic, polymer) • Apply information on elastic and plastic deformation for predicting the loads or strain, that lead to yielding, ultimate strength, or fracture. Differentiate the characteristic stress–deformation in metals, ceramics, crystals and non-crystals, polymers • Identify common defects in materials, when do they occur, and how they influence the mechanical characteristics of materials • Recognize the mechanisms that alter the mechanical properties of materials (deformation hardening, solid solution and precipitation hardening, …) • Identify phases and concentrations, eutectic, eutectoid alloys and reactions on phase diagrams of solid state components – with complete and partial solubility, and components with the absence of solubility, and recognize simple microstructures and their influence on mechanical properties of materials • Perform experiments (standard destructive tests) from which they analyze and interpret results of mechanical tests (hardness, plasticity, toughness, material resistance and deformation) on standard devices and machines (devices for measuring hardness by static and dynamic load, tensile testing machines, Charpy pendulum, extensometers, …) • Select the material type for the given system, component or process, as to satisfy the loading and functionality criteria, from the aspects of the structure, property, technology and process • Recognize the types of damage in engineering materials, their application and behaviour in exploitation (fatigue and creep), the classification and specifics of certain groups of modern materials used in mechanical engineering applications • Apply the concepts of crack propagation and brittle fracture, as well as the ductile-to-brittle transitional effects in the goal to predict the fracture of brittle materials

Introduction. Engineering materials, classification, metals, ceramics, glass, polymers, composites. Material properties: mechanical, electrical, magnetic, optical. Material processing - general terms. Chemical bonding types. Crystalline and amorphous structures. Melting temperature. Softening. Crystalline structure of metallic materials, types of crystal lattices. Defects in crystal structures, point, linear, interfacial, and volume defects, and their importance. Plastic deformation. Diffusion. Fracture terms in general. Theoretical cohesive strength of metals. Basic elements in fracture mechanics. Fracture toughness. Transition temperature. Types of fracture, brittle, ductile. Basic terms in the theory of alloys. Pure metals. Solid solutions. Interstitial solid solutions. Substitutional solid solutions. Intermediate compounds. Eutectic reactions. Cooling curves. Characteristics. Basic types of phase diagrams.

Unit cell. Miller indices of planes and directions. Structure of ceramics, polymers. Behaviour of materials in the state of mechanical loading. Stress - deformation: metals, ceramics, polymers. Elastic deformation. Plastic deformation. Tensile testing. Pressure testing. Module of elasticity. Hardness, methods, based on static and dynamic loading, testing in laboratory conditions. Toughness, impact testing. Fatigue of materials. Technological testing. Creep. Non-destructive testing of materials. Phase diagrams of alloys - binary isomorphous systems with complete solid solubility. Phase diagrams of alloys - binary systems with intermediate phases/compounds. Phase diagrams of alloys - binary eutectic systems with limited solid solubility. Characteristics and applications.

Basic knowledge of mathematics, physics and chemistry.

1. Lecture handouts, documents to download from the web at http://afrodita.rcub.bg.ac.rs/~rzoran (in Serbian) 2. Prokić-Cvetković, R., Radaković, Z., Bakić, G., Popović, O., Đukić, M.: Engineering Materials, a manual for laboratory exercises, I part, University of Belgrade, Faculty of Mechanical Engineering, 2019. (lab. workbook, in Serbian) 3. Đorđević, V., Vukićević, M.: Engineering Materials, Practicum for exercises – part one, University of Belgrade, Faculty of Mechanical Engineering, 1998. (in Serbian) 4. Đorđević, V.: Engineering Materials – part one, University of Belgrade, Faculty of Mechanical Engineering, 1999. (in Serbian) 5. Šiđanin, L.: Engineering Materials 2, University of Novi Sad, Faculty of Technical Sciences, 1996. (in Serbian) 6. Callister, W.D., Rethwisch, D.G.: Materials Science and Engineering: An Introduction, 8th Ed., Wiley and Sons, 2010.

Total assigned hours: 30

New material: 11
Elaboration and examples (recapitulation): 1

Auditory exercises: 6
Laboratory exercises: 5
Calculation tasks: 1
Seminar paper: 0
Project: 0
Consultations: 0
Discussion/workshop: 0
Research study work: 0

Review and grading of calculation tasks: 0
Review and grading of lab reports: 2
Review and grading of seminar papers: 0
Review and grading of the project: 0
Test: 2
Test: 0
Final exam: 2

Activity during lectures: 5
Test/test: 15
Laboratory practice: 10
Calculation tasks: 0
Seminar paper: 0
Project: 0
Final exam: 70
Requirement for taking the exam (required number of points): 30

Прокић-Цветковић, Р., Поповић, О.: Машински материјали 1, издање Машинског факултета Универзитета у Београду, 2012.; Прокић-Цветковић, Р., Поповић, О.: Машински материјали 1, издање Машинског факултета Универзитета у Београду, 2012.; Ђорђевић, В., Вукићевић, М.: Машински материјали, практикум за вежбе – први део, издање Машинског факулктета Универзитета у Београду, 1998.; Шиђанин, Л.: Машински материјали 2, ФТН, Нови Сад, 1996.; Callister, W.D., Rethwisch, D.G.: Materials Science and Engineering: An Introduction, 8th Ed., Wiley and Sons, 2010.