Ternopil Ivan Puluj National Technical University

Каф. інжинірингу машинобудівних технологій

Fundamentals of Welding Technology


1. Educational programs for which discipline is mandatory:

# Educational stage Broad field Major Educational program Course(s) Semester(s)
1 бакалавр 13. Механічна інженерія 131. Прикладна механіка (бакалавр) Інжиніринг технологій машинобудування та зварювання 3 5

2. The course is offered as elective for all levels of higher education and all educational programs.

3. Information about the author of the course

Full name Лазарюк Валерій Володимирович
Academic degree Cand. Sc.
Academic title Assoc. Prof.
Link to the teacher`s page on the official website of the University
Е-mail (in the domain

4. Information about the course

Study hours structure Lectures: 36
Practical classes: 18
Laboratory classes: 0

Amount of hours for individual work: 55
ECTS credits: 4,0
Teaching language english
Form of final examination credit
Link to an electronic course on the e-learning platform of the university

5. Program of discipline

Description of academic discipline, its goals, subject of study and learning outcomes

The purpose of the study discipline:
Course "Fundamentals of Welding Technology" is intended to learn the necessary knowledge of welding technology and the possible impact on the mechanical properties of metals used as components of machines and structures. Also within the discipline of studying on the most common methods of welding, physical nature of welding, heat treatment of welds, welding quality control.

The purpose and objectives of the study subjects-theoretical and practical training of future professionals - builders in mastering information on the structure and properties of metallic materials and means of managing their properties, mastering welding technology building structures.

After studying the discipline the student should be able to:

-to establish the relationship between structure and properties of metallic materials;

-choose their own methods of thermal hardening and softeningmetallic material;

-appoint a heat treatment of constructional, tool and special alloys

-classification of welding,

-physical nature welding,

-basic methods of welding.


-basic laws of structure formation during crystallization and metalsplastic deformation;

-theory of metal alloys;

-structure and properties of steels and cast irons;

-impact of doping on the structure and properties of steelsand alloys;

- theory and practice of heat treatment of alloys;

-the characteristics of the properties and purpose of ferrous and nonferrous metals and alloys,

-physical nature and classification of welding,

-main types of welding,

-types of welded joints and welding quality control.

The place of academic discipline in the structural and logical scheme of study according to the educational program

Prerequisites. List of disciplines, or knowledge and skills, possession of which students needed (training requirements) for successful discipline assimilation

Technology of structural materials and Material Science
Foundations of Heat Engineering
Higher Mathematics
Electrical engineering, Electronics and Microprocessor equipment

List of disciplines based on learning results from this discipline

Technological Methods of Workpiece Manufacturing for Machine Parts
Automated Manufacturing Technology
Industrial Equipment
Technological practice

Contents of the academic discipline

Lectures (titles/topics)

Lecture 1 Introduction to the process of welding
Lecture 2 Classifying welding processes
Lecture 3 Fusion welding processes
Lecture 4 Nonfusion welding processes
Lecture 5 The physics of welding
Lecture 6 The flow of heat in welds
Lecture 7 Thermall induced distortion and residual stresses during welding
Lecture 8 The physics of welding energy or power
Lecture 9 Molten metal transfer in consumable electrode arc welding
Lecture 10 Weld pool convection, oscillation, and evaporation
Lecture 11 Molten metal and weld pool reactions
Lecture 12 Weld chemical heterogeneity
Lecture 13 Weld fusion zone solidification
Lecture 14 Eutectic, peritectic, and postsolidification fusion zone transformations
Lecture 15 The partially melted zone
Lecture 16 The weld heat-affected zone
Lecture 17 Weldability and weld testing

Practical classes (topics)

Practical class 1 - Grading of Steels. Equivalent carbon content
Practical class 2. Types of Welding Electrodes
Practical class 3 - Distribution temperatures on Weld
Practical class 4 - Thermal cycles of welding
Practical class 5 - Effect of Cooling Rate on Weld Properties
Practical class 6 - Recommendations for welding of metallic materials
Practical class 6 - Welding Technologies of carbon steels
Practical class 6 - Welding Technologies of alloyed steels

Learning materials and resources

Mielnik E.M. Metalworking Science and Engineering* McGraw-Hill, Inc.,1991 .-976 c
Ugural A.C. Mechanics of Materials, Handbook*McGraw-Hill, Inc.,1991
Robert W. Messler Principles of welding,
Thomas Eagar Welding and Joining Processes, Selected lecture notes,
Lancaster J.F. Metallurgy of welding, Handbook,
Lippold John C. Welding Metallurgy and Weldability,
Esab AB Repair and Maintenance Welding Handbook, 2nd edition,
Wilhelmsen Ships Service/ Maritime Welding Handbook, 11th edition,
*university library
Approved by the department
of Mechanical Engineering Technology
(protocol №
on «
08. 2021