The aim of this course is to present the basic terms of welding metallurgy, as the most important field of science of welding, without whose understanding and knowledge is not possible to achieve a quality weld, and to establish a relationship of structure and properties of welded joints. For an understanding of this course, students need to have basic knowledge of materials science and physical metallurgy, which have gained in master classes. It is expected that upon completion of this course, students should be familiar with the metallurgical aspects of welding, including knowledge of microstructure and properties of welded joints, as well as the difficulties that arise in achieving high-quality joint, in order to be able to practically apply the knowledge and prescribe the proper technology welding.

Upon the successful completion of the course, the students are able to: - Differentiate the heat sources in welding and understand their influence on heat distribution in welded joint - Define chemical reactions in welding zone - Understand the influence of residual stresses on joint safety - Define phase transformation in steel during welding - Understand structural changes in weld metal, fusion zone and heat affected zone - Define types of cracking and their influence on joint quality - Understand processes during welding of precipitation hardening metals

Introduction-Basic terms in fusion welding processes-The welding heat source and analysis of heat flow during welding-Chemical reactions in welding zone-Welding pool formation-Weld residual stresses-Basic concepts of solidification-Effect of cooling rate-Grain growth and phase transformation after solidification in the fusion zone-Macro and microsegregations in the fusion zone-The heat-affected zone-Recrystallization and grain growth of the heat-affected zone-Phase transformation during the welding of steel-Solidification cracking of welded joint-Precipitation-hardening materials (aluminium alloys and nickel-base alloys)-Welding of stainless steels.

Consultations

Completed master studies

1. Sindo Kou, Welding Metallurgy, Second edition, John Wiley& Sons, (2003), ISBN:978-04-7143-491-7 2. O.Grong, Metallurgical modelling of welding, Second edition, The Institute of materials, (1997) ISBN-13. 978-1861250360 3. R.Prokić Cvetković, O.Popović, Metallurgy of welding, Faculty of Mechanical Engineering, Belgrade, 2019, ISBN 978-86-6060-156-0

Total assigned hours: 65

New material: 35
Elaboration and examples (recapitulation): 15

Auditory exercises: 0
Laboratory exercises: 0
Calculation tasks: 0
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: 5
Review and grading of the project: 0
Test: 0
Test: 0
Final exam: 10

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

Sindo Kou, Welding Metallurgy, Second edition, John Wiley& Sons, (2003), ISBN:978-04-7143-491-7 ; O.Grong, Metallurgical modelling of welding, Second edition, The Institute of materials, ISBN-13. 978-1861250360(1997)