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Course Detail

Course Name Advanced Welding Technology
Course Code 19MEE441
Program B. Tech. in Mechanical Engineering
Year Taught 2019


Unit 1

Overview of welding processes and their classification, types of joints, edge preparation, weld symbols, weld nomenclature, bead geometry, power density, heat sources – Gaussian distribution of heat flux, welding techniques – linear and orbital. Arc characteristics. Voltage-current characteristics. Types of welding manipulators and their applications.
Advanced welding processes: submerged arc, TIG, MIG, electro-slag, ultrasonic, electron beam and laser beam welding. Case studies and applications – industrial, automotive and aerospace.

Unit 2

Thermal modeling and simulation of welding processes – governing heat transfer equations and boundary conditions for various types of welding processes. Estimation of cooling rates. Prediction of mechanical properties, micro/macro-structures of weldments and heat-affected zone. Prediction of weld defects such a crack, segregation, lack of fusion. Modeling and simulation of pulsed arc processes. Use of softwares for simulation.
Solidification behaviour of fusion weld: structural zones, epitaxial growth, weld pool shape and columnar grain structures. Weldability of metals- steels, stainless steels, aluminium, copper, nickel and titanium alloys.

Unit 3

Microstructures of weldment.Segregation of alloying elements.Impact of micro/macro-structures and segregation on mechanical properties.Pre- and post-treatment. Effects of heat flow on residual stresses and distortion. Weldability tests.
Welding defects – causes and remedies.Methods of testing weldments – mechanical, pressure and leak testing.Inspection methods – visual, penetrant, magnetic, ultrasonic, x-ray and gamma radiography.Use of imaging techniques for online monitoring.

Objectives and Outcomes

Course Objectives

  • Elucidate the concepts of continuity, mechanism, physics, and design elements in welding process
  • Comprehend the characteristics of weldable materials and welding technologies
  • Demonstrate the importance of modelling and simulation of welding process
  • Develop intellectual skills for correlating the microstructural evolution with the defects and properties of weldments

Course Outcomes

  • CO1: Describe welding processes, welding symbols, joint configurations, and heat source characteristics
  • CO2: Formulate governing equations and boundary conditions to simulate the thermal phenomenon in the course of a welding process
  • CO3: Evaluate the microstructural evolution on the properties of weldments
  • CO4: Identify appropriate techniques for detecting the welding defects

CO – PO Mapping

CO1 1 1
CO2 3 3 2 2 3 2 2 1 1 3 2 3
CO3 3 3 2 3 2 2 3 1 3
CO4 1 1 2 1 1

Textbook / References


  • Khanna O. P. – ‘A Text Book on Welding Technology’ – Dhanpat Rai and Sons, New Delhi – 2013
  • Parmar R. S. – ‘Welding Process and Technology’ – Khanna Publishers, Delhi – 1992


  • Little R. L. – ‘Welding and Welding Technology’ – Tata McGraw Hill Publishing Company Limited, New Delhi – 1989
  • Grong O. – ‘Metallurgical Modelling of Welding’ – The Institute of Materials – 1997 – 2nd Edition
  • Kou S. – ‘Welding Metallurgy’ – John Wiley Publications, New York – 2003 – 22nd Edition.

Evaluation Pattern

Assessment Internal External
Periodical 1 (P1) 15
Periodical 2 (P2) 15
*Continuous Assessment (CA) 20
End Semester 50
*CA – Can be Quizzes, Assignment, Projects, and Reports.

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