Näytä opetus
BK20A2400 Materials and Welding Metallurgy, 5 op 
Tunniste BK20A2400  Voimassaolo 01.08.2016 -
Nimi Materials and Welding Metallurgy  Nimilyhenne Materials and W 
Laajuus5 op   
  ArvosteluasteikkoOpintojaksot 0-5,H,P 
    Voidaan suorittaa useastiei
Vastuuyksikkö LUT School of Energy Systems (23B2) 

Miikka Karhu 

Opintojakson kuvaus opinto-oppaan mukaan

Location: Lappeenranta


M.Sc. (Tech.) 1






​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

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.

Kuulustelujärjestyksen mukainen tentti (Kyllä/Ei) 


Moodle-tentti (Kyllä/Ei) 


Exam-tentti (Kyllä/Ei) 


Arviointiskaala ja arviointimenetelmät 

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

  • 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.

Vaihto-opiskelijoille paikkoja? (Kyllä,paikkamäärä/Ei) 


Paikkoja avoimen yliopiston opiskelijoille? (Kyllä, paikkamäärä/Ei) 

max 10


Meneillään oleva ja tuleva opetus
Toiminnot Nimi Tyyppi op Opettaja Aikataulu
  Materials and Welding Metallurgy  KURSSI  Paul Kah,
Miikka Karhu,
Eric Mvola Belinga,
Antti Salminen 
07.01.20 -17.04.20 -

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