• Semester 3, position 4

The aim of this course is for students to become competent in the area of Engineering materials 2. They should also develop appropriate academic skills and creativity and master practical skills needed for the profession. This course is designed to provide information through theoretical lectures but also through laboratory type (practical) exercises, computational classes and seminar papers students are responsible for writing.

Upon the successful completion of the course, the students are able to: • Understand the dependence between microstructure, Fe-Fe3C and Fe-C phase diagrams, and the mechanical properties of the material • Differentiate between steels and irons and define the fields of their application • Select the proper heat- or chemical treatment, based on the required properties of the steel • Define the characteristics and application of light and non-ferrous metals and alloys (Al, Cu, Ni, Ti, ...) • Understand the conventional welding techniques • Differentiate between the conventional welding techniques • Apply the proper welding procedure for the given material

Metastable and stable phase diagrams of Fe - C. Steel and types of steel. Cast irons. Heat treatment of steel - annealing, quenching and tempering. Case hardening treatments: carburization, nitriding, carbonitriding, diffusion metalization. Non-ferrous alloys – aluminium, its alloys and their heat treatment. Nickel based alloys. Titanium based alloys. Hardfacing alloys. Introduction to welding. Electric arc. Arc welding. Manual metal arc welding (MMA). Gas metal arc welding (MIG - Metal Inert Gas and MAG – Metal Active Gas), gas tungsten arc welding (TIG – Tungsten Inert Gas), submerged arc welding. Oxyfuel welding and cutting. Resistance welding.

Cooling curves. Determination of the composition and fraction of the phases (lever rule). ТТТ and CCT diagrams and their application. Aloyed steels. Light microscopy and misrostructure. Heat treatment of steel. Steel marking. Material defects and their identification. Hardenability. Jominy end-quench method. Heat treatment of aluminium alloys-quenching and ageing. Mechanical testing od welded joints. Preparation of materials for welding. Technics and technology of arc welding. Technics and technologies of inert gas metal arc welding, shielded metal arc welding, tungsten arc welding, submerged arc welding. Technics and technologies of oxifuel welding and cutting. Resistance welding and methods. Welding Laboratory practice - electric arc welding, oxyfuel welding and cutting, resistance welding. Tests and Office hours.

Necessary conditions for a student to attend this course are: attended course lectures and finished exercises of Engineering materials 1.

Total assigned hours: 75

New material: 20
Elaboration and examples (recapitulation): 10

Auditory exercises: 4
Laboratory exercises: 24
Calculation tasks: 2
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: 0
Review and grading of seminar papers: 0
Review and grading of the project: 0
Test: 4
Test: 6
Final exam: 5

Activity during lectures: 10
Test/test: 30
Laboratory practice: 30
Calculation tasks: 0
Seminar paper: 0
Project: 0
Final exam: 30
Requirement for taking the exam (required number of points): 40

W. Callister, Materials Science and Engineering, John Wiley & Sons, Inc., 2007. ; A.Sedmak, V. Šijački Žeravčić, A. Milosavljević, V. Đorđević, M. Vukićević, Mašinski materijali, drugi deo, Mašinski fakultet, Beograd, 2000; V. Đorđević, Mašinski materijali, Mašinski fakultet, Beograd,1999; A.Sedmak, V. Šijački Žeravčić, A. Milosavljević, V. Đorđević, M. Vukićević, Mašinski materijali, drugi deo, Mašinski fakultet, Beograd, 2000