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BK20A2400 Materials and Welding Metallurgy, 5 cr 
Code BK20A2400  Validity 01.08.2016 -
Name Materials and Welding Metallurgy  Abbreviation Materials and W 
Credits5 cr   
TypeBasic studies  
  Grading scaleStudy modules 0-5,P/F 
  Eligibility for post-graduate studiesno
    Allowed to study several timesno
Organisation LUT School of Energy Systems 

Miikka Karhu 

Description by Study Guide

Location: Lappeenranta


M.Sc. (Tech.) 1



Teaching Language 


Teacher(s) in Charge 

​Project researcher, D.Sc. (Tech.) Miikka Karhu
(Changed 29.1.2020/TP)


This course aims to provide students the understanding of the microstructures and metallurgical characteristics of welded joints in ferrous and non-ferrous alloys, the formation of weld defects and how the metal and heat source interaction affects microstructure and strengthening behaviour of different alloys. Course exercise features real example in welding engineering. On successful completion of this course, a student should be able to:

  • Define the practical applications of metallurgy
  • Identify fundamental principles and practices of welding metallurgy
  • Predict and analyse the macro and microstructures of the welded joint
  • Explain the causes of defects in welds and how they can be avoided
  • Carry out weld joint characterization
  • Identify the composition and classification of base metals
  • Describe the principles of metal corrosion
  • Explain the physical characteristics and mechanical properties of metals
  • Identify grain structures and hard-facing of a weldment
  • Demonstrate preheat, inter-pass and post-weld heat treatment of metals
  • Identify hydrogen cracking and the effects of welding on metals
  • Identify metallurgical considerations for welding ferrous and non-ferrous metals
  • Demonstrate heat treatment and its impact on metals
  • Relate hardness to other properties including metals
  • Recommend procedures and methods necessary to prevent the formation of undesirable phases and weld, defects for dissimilar metallic alloys
  • Use software for welding metallurgy modelling

The course consists of lectures, which topics are listed below:

  • Welding Metallurgy principles
  • Weldability of metals and non-metal materials
  • Solidification of welds and factors imposing
  • Welding energy/heat input and their effect on welding
  • Heat treatments
  • Cracks and fracture phenomenon
  • Fundamentals of corrosion
  • Weldability tests
  • Metallurgical quality of weld and failure analyses
  • Principles of metallographic examinations

Each lecture has an exercise consisting of multiple choice and open questions, and some practical assignments, which are industry related tasks of a welding engineer, for assessing:

  • Characterization of weld joints
  • Sample preparation, micrograph analyses and quantification
  • Understanding of the weld solidification principle
  • Identification and avoiding the risk of premature failure
  • Relating microstructure to the welded joint performance
  • Adapting effective approach to WPS base on metallurgical knowledge
  • Utilisation of software to predict and model phase transformation
Teaching Methods 

The course is delivered in the form of lectures with interactive questions and discussions with students. One assignment every two weeks will be carried out in moodle and only electronic exams will be conducted.
Lectures and assignments - 3rd period
Lectures, assignments and laboratory tutorials - 4th period

Material delivery and teaching methods:

  • Lectures and interactive exercises: 70 h
  • Laboratory exercises: 12 h including sample preparation, micro-graph analyses and quantification
  • Preparation of exercises: 20 h
  • Preparation for exam: 28 h

Total workload: 130 h
The course is suitable for distance learning.

Examination in Examination schedule (Yes/No) 


Examination in Moodle (Yes/No) 


Examination in Exam (Yes/No) 


Assessment scale and assessment methods 

Grading: numerical assessment (0-5)
Exam: 50 %
Individual Assignments (25%) and Group laboratory exercise (25%)

Course Materials 
  • Course lecture slides
  • Welding: Principles and Applications, L. Jeffus, 2016, Cengage Learning
  • Welding Metallurgy, Kou, S, 2003, Second Edition, Wiley
  • Modern Welding Technology, Howard B. Cary, Scott Helzer, Sixth Edition, Pearson
  • Welding Metallurgy and Weldability, John C. Lippold., 2015, 
  • Applied Welding Engineering, Processes Codes and Standards, Ramesh Singh, 1st Edition, Elsevier

Basic understanding of welding processes and materials sciences.

Places for exchange-students? (Yes, number/No) 


Places for Open University Students?(Yes, number/No) 

max 10


Current and upcoming courses
Functions Name Type cr Teacher Timing
  Materials and Welding Metallurgy  COURSE  Paul Kah,
Miikka Karhu,
Eric Mvola Belinga,
Antti Salminen 
07.01.20 -17.04.20 -

Upcoming exams
No exams