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Indian Institute of Technology Madras

Welding Processes

Indian Institute of Technology Madras via YouTube

Overview

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Learn about the physics of welding processes. The course is divided in seven parts. It will cover the entire spectrum of welding processes that are commonly used for engineering applications.

It begins with a general survey and classification of welding processes based on various methodologies with discussions on heat source and the principles behind heat generation. There will be discussions on the most widely used arc welding process and the physics behind Arc. What is arc and how is heat generated in Arc? What are the reactions in an arc? The course will further move to discuss the processes such as gas tungsten arc welding, the physics and the application of such a process and parameters that would affect the stability of these process.

The course will proceed with discussions about consumable welding processes with its focus on Gas Metal Arc Welding and the variants of this process. Learners will also see how the process characteristics change the metal transfer characteristics and its behaviour. The course will talk about Laser and Electron Beam Welding and end with solid state welding processes such as friction welding, ultrasonic welding and explosive welding, which does not involve melting

 

 

Syllabus

Introduction to the course.
Classification of welding processes and definition of welding arc.
Physics of welding arc - Part 01.
Physics of welding arc -Part 02.
Physics of welding arc -Part 03.
Physics of welding arc -Part 04.
Fundamentals of ionisation in welding arc.
Electrical conductivity of welding arc.
Electrical resistivity of welding arc.
Heat transfer inside the arc.
Arc ignition mechanisms Part - I.
Arc ignition mechanisms Part - II.
Principles of Gas Tungsten Arc Welding.
Shielding gases for arc welding.
Selection of shielding gases for engineering alloys.
Arc welding power sources Part 01.
Arc welding power sources Part 02.
Arc welding power sources Part 03.
Variations in GTAW process.
Square wave, variable polarity, GTAW with filler, hot wire GTAW.
Dual gas GTAW and Plasma Welding processes.
Multi cathode GTAW and Activated GTAW.
Buried GTAW and Rate controlling parameters of GTAW.
Introduction to consumable welding processes.
Melting rate of consumable wires.
Physics of droplet transfer in consumable welding.
Modes of droplet transfer - Part 1.
Modes of droplet transfer - Part 2.
Modes of droplet transfer - Part 3.
Shielded Metal Arc Welding.
Flux cored arc welding - Introduction.
Electrode fluxes and process characteristics of flux cored arc welding.
Flux cored arc welding - Process characteristics.
Advances in gas metal arc welding - Pulsed GMAW.
Advances in gas metal arc welding - Controlled dip short circuiting processes.
Submerged arc welding.
Resistance welding - Fundamentals.
Resistance spot welding - Part 01.
Resistance spot welding - Part 02.
Resistance spot welding - Part 03.
Resistance spot welding - Part 04.
Variants in resistance welding - Part 1.
Variants in resistance welding - Part 2.
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Taught by

NPTEL-NOC IITM

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Reviews

4.7 rating, based on 21 Class Central reviews

Start your review of Welding Processes

  • Profile image for SHUBHASHIS GHOSH
    SHUBHASHIS GHOSH
    first of all thanks to IIT Madras to give us an opportunity to do the course with free.
    The teaching of professor was incredible.now my concept are crystal clear.
  • Profile image for Nikko Llaban
    Nikko Llaban
    Great work! From this lab, I learned everything I now know about machines and machining. I came into this class with no knowledge on the subject so I was able to learn a lot. I learned how to drill holes with machines, I learned to center drill and…
  • Michael Mondoka
    Nice course, Learnt a lot about welding processes. It's really timely and very helpful for anyone who is trying to advance there career in the welding industry
  • MOHAMED NIZARUDEEN.A
    Good course. The course was very comprehensive and easy to understand. The instructors made sure that they are giving the information in a way that won't make me confused. Thank you so much for this great course! Very interesting course, better done when in an academic context and with an ongoing project to carry out the exercises for.
  • Mohammed İsmail Jaseem
    Great course. Was not expecting some thing this well put together. I also must say I appreciate the access and availability of this Welding course. I think that even if you have been welding for years, it is always good to go back and look at the science and book portion of what we do.
  • Reza Hayatizadeh
    In my opinion it was a really complete and helpful course but i had some problems with the teacher's English pronunciation but as i said before all in all it was a good course.
  • SHARUN T SATHYAN
    Very useful sessions . I really like the way he taught me. Itvwas just awesome class and I'm and indian but grown in uae but i could understand Easley. Thank you
  • Profile image for Somiya Mittal
    Somiya Mittal
    The concepts is crystal clear and sir teaches very amazing. I m very happy to study from the iit madras teacher.. It gives the real feel of iit..
  • Dnyaneshwar Somnath Lawand
    Good content, more knowledgeable and complete theory covered.
    Useful for Freshers and welding engineers also.
  • Shahid Noor Multani
    Very knowledge course I am very happy teachers are very good explain welding process my knowledge is increase
  • Erik V. Kline Jr
    Great course. Was not expecting some thing this well put together. I also must say I appreciate the access and availability of this Welding course. I think that even if you have been welding for years, it is always good to go back and look at the science and book portion of what we do. Especially after having some experience somethings click better when you go back to the book then when you first heard it.
  • Harish
    I learned about welding process and problems in the welding process and its problems, air teaches very well than college teachers I learned about welding process fully
  • Profile image for Sevukapandian R
    Sevukapandian R
    This is the best class room for the welding course,I like the class room and learn more particular action and works for the class room
  • Profile image for Latha Rani
    Latha Rani
    It is all about mathematics tecnics used ...it is used for aerosters to learn ..all can learn ...it will teach more useful things.
  • Profile image for Mohammed Yousuf Ahmed
    Mohammed Yousuf Ahmed
    The course was very comprehensive and easy to understand. The instructors made sure that they are giving the information in a way that won't make me confused. Thank you so much for this great course! Very interesting course, better done when in an academic context and with an ongoing project to carry out the exercises for.
  • Profile image for Aminu Mustapha Ishaq
    Aminu Mustapha Ishaq
    The course was very comprehensive and easy to understand. The instructors made sure that they are giving the information in a way that won't make me confused. Thank you so much for this great course! Very interesting course, better done when in an academic context and with an ongoing project to carry out the exercises for.
  • Mohammad Kaish
    Nice learning and smart ways of learning and teaching and research and development of the fact that I don't know how to make holiday why don't you think now all the best teacher till now so I can do that u are interested and I will be in mechanical industry da iPhone Inizio ok I don't know when you have to be
  • Adesh Sonyabapu Dome
    It a good course . It helps alot to me .but where is completion certificate.they said after completion of we will provide a certificate but it didn't appear on Home page after completing my course it disappointed me
  • Profile image for Jones Dhanasekaran
    Jones Dhanasekaran
    One of the best courses I have taken by far. Everything from the videos to assignments is amazing and informative. It has helped me tremendously. I encourage everyone to take it.
  • Profile image for Omar Sahel
    Omar Sahel
    Welding Processes is Great course, we have had a good awareness in welding processed, we hope to take NDT certificate to achieve my opinion to be as welding inspector

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