Thermo-Mechanical And Thermo-Chemical Processes

By Prof. Vivek Pancholi, Prof. S. R. Meka   |   IIT Roorkee
Learners enrolled: 191
Microstructural features like grain size, phase fraction and size distribution can be tailored by understanding and optimizing thermo-mechanical and thermo-chemical processes i.e. coupling the heat treatment either by introduction of mechanical energy into solids or by altering the chemistry of solids. Accordingly, several Thermo-Mechanical and Thermo-Chemical processes/treatments have been developed by the researchers. This course is designed to provide the fundamental science behind these processes so that optimal utilization of these processes is possible. Course will cover the utilization of flow stress data from hot deformation experiments to develop constitutive equations and processing maps, the interrelationship between microstructure and deformation features with the thermo-mechanical deformation processes. Important thermo-chemical processes such as nitriding, carburizing, carbonitriding, nitrocarburizing and boriding will be covered. 

INTENDED AUDIENCE:  Final year B.Tech., M.Tech. and PhD scholars in Metallurgical Engineering or Materials Engineering. Practicing engineers in steel and aluminum industries. 

PREREQUISITES: Mechanical Metallurgy, Physical Metallurgy, Basic Thermodynamics.

INDUSTRY SUPPORT: SAIL, TATA steel, Essar Steel, BHEL, JSW steel, Hindalco, Tata Motors, Larsen & Toubro.

Course Status : Completed
Course Type : Elective
Duration : 8 weeks
Category :
  • Metallurgy and Material science & Mining Engineering
  • Materials Joining
  • Minor in Metallurgy
Credit Points : 2
Level : Undergraduate/Postgraduate
Start Date : 25 Jul 2022
End Date : 16 Sep 2022
Enrollment Ends : 08 Aug 2022
Exam Date : 25 Sep 2022 IST

Note: This exam date is subjected to change based on seat availability. You can check final exam date on your hall ticket.

Page Visits

Course layout

Week 1: Introduction, Hot deformation processes I, Hot deformation processes II, Flow curves as a function of strain rate and temperature, Stress, strain, strain rate sensitivity.
Week 2: Microstructural evolution, Recovery, Recrystallization, Dynamic recrystallization, discontinuous dynamic recrystallization (DDRX), continuous dynamic recrystallization (CDRX), geometric dynamic recrystallization (GDRX). 
Week 3: Texture, Deformation texture (BCC), Deformation texture (FCC), Recrystallization texture (BCC), Recrystallization texture (FCC). 
Week 4: Constitutive analysis, Low strain rate , Medium strain rate, High strain rate, case study
Week 5: Deformation maps, Processing maps, Different models, Interpretation, Processing maps microstructure correlation, case study.
Week 6: SPD based thermo-mechanical processes, Friction stir Processing, Equal Channel Angular Processing, High pressure torsion, case study.
Week 7: Introduction to Thermo-chemical surface treatments, Thermodynamics of gas/solid interaction. 
Week 8: Phase transformations and consequent surface property enhancement during nitriding of iron based alloys.

Books and references

  1. Bert Verlinden, Julian Driver, Indradev Samajdar, Roger Dohert, Thermo-Mechanical Processing of Metallic Materials, Volume 11, eBook ISBN: 9780080544489, Hardcover ISBN: 9780080444970, Elsevier Science, 2007.
  2. Anthony Rollett, Gregory S. Rohrer, John Humphreys, Recrystallization and Related Annealing Phenomena, 3rd Edition, eBook ISBN: 9780080982694, Hardcover ISBN: 9780080982359, Elsevier, 2017.
  3. Editor: Y.V.R.K. Prasad, K.P. Rao, S. Sasidhara, Hot Working Guide: A Compendium of Processing Maps, Second Edition, ISBN: 978-1-62708-091-0, ASM International.
  4. E.J. Mittemeijer , Fundamentals of nitriding and nitrocarburizing.  In ASM Handbook 4A: Steel Heat Treating Fundamentals and Processes. : ASM International, Metals Park, 2013, pp. 619-646. J. Dossett and G.E. Totten [editors]. 
  5. M.A.J. Somers and E. J. Mittemeijer [Editors]. Thermochemical Surface Engineering of Steels. s.l. : Woodhead Publishing, 2015.

Instructor bio

Prof. Vivek Pancholi

IIT Roorkee
Dr. Vivek Pancholi obtained BE (Industrial and Production Engg.) in 1995 from G.S.I.T.S. Indore, M.Tech. (Industrial Tribology) from IIT Delhi in 1997 and PhD in Metallurgical Engineering from IIT Bombay, in 2005. He joined IIT Roorkee as a faculty member in the Department of Metallurgical and Materials Engineering in 2006. He has about 10 years teaching experience at IIT Roorkee.  He taught UG core courses like Structural Metallurgy, Phase transformation and Heat treatment, Welding and Casting and, Mechanical Behavior of Materials. He also taught M.Tech. core course on Materials Characterization.. He has published more than 35 research papers in SCI/SCIE indexed journals and completed 05 sponsored research projects. Under his guidance four PhD research scholars completed their thesis and five are working.

Prof. S. R. Meka

Dr. Sai Ramudu Meka is working as a faculty in the Department of Metallurgical and Materials Engineering, IIT Roorkee. He obtained his bachelor of engineering degree in Metallurgy from NIT, Surathkal in the year 2002. Then he served as a Junior Manager for Jindal Vijayanagara Steels Ltd. (JVSL), Toranagallu, Bellary, Karnataka. In 2004 he left JVSL to pursue his master's studies in Metallurgy and Materials science at IIT Kanpur. In 2007 he started with his doctoral studies at Max Planck Institute (MPI) for Metals Research, Stuttgart, Germany and obtained his Ph.D in the year 2011. Thereafter he worked as a research scientist at MPI, Stuttgart. He has extensively worked on fundamental understanding of gaseous nitriding of steels. He has published more than 35 peer reviewed research papers and currently actively working on thermodynamics and kinetics of thermos-chemical processes.

Course certificate

The course is free to enroll and learn from. But if you want a certificate, you have to register and write the proctored exam conducted by us in person at any of the designated exam centres.
The exam is optional for a fee of Rs 1000/- (Rupees one thousand only).
Date and Time of Exams: 25 September 2022 Morning session 9am to 12 noon; Afternoon Session 2pm to 5pm.
Registration url: Announcements will be made when the registration form is open for registrations.
The online registration form has to be filled and the certification exam fee needs to be paid. More details will be made available when the exam registration form is published. If there are any changes, it will be mentioned then.
Please check the form for more details on the cities where the exams will be held, the conditions you agree to when you fill the form etc.


Average assignment score = 25% of average of best 6 assignments out of the total 8 assignments given in the course.
Exam score = 75% of the proctored certification exam score out of 100

Final score = Average assignment score + Exam score

YOU WILL BE ELIGIBLE FOR A CERTIFICATE ONLY IF AVERAGE ASSIGNMENT SCORE >=10/25 AND EXAM SCORE >= 30/75. If one of the 2 criteria is not met, you will not get the certificate even if the Final score >= 40/100.

Certificate will have your name, photograph and the score in the final exam with the breakup.It will have the logos of NPTEL and IIT Roorkee. It will be e-verifiable at nptel.ac.in/noc.

Only the e-certificate will be made available. Hard copies will not be dispatched.

Once again, thanks for your interest in our online courses and certification. Happy learning.

- NPTEL team

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