60 Comments

  1. brother god spoke to me and said the answer is aluminum. I do not know what this means I pray for you. I mean no harm I apologize he has taken me to you

  2. This helped me understand the concept very well, I read through material science by phaneesh and I can say I am very confident now, this is the hardest part of msm and now it seems easy. thank you very much,sir. Helped me a lot.

  3. sir, u are very great…….. i recommend u alot for students who are slow learners like me…. very good video

  4. For the Past 4 years. I have been afraid of this particular topic from Material Science. Thankyou sir for making it so easy to understand.

  5. Why we don't have Face center tetragonal bravias lattice, even in case of orthorhombic where all three sides different i.e, a,b,c all are not equal to each other, but still we have simple cubic, body centered, face centered and end centered. why so in case of tetragonal, only simple cubic and body centered, not face centered?

  6. sir before I watched this video I knew nothing about iron corbon diagram but am sure now I know very well really awesome…..

  7. Authors define the eutectoid point of the FeC diagram with different% C (example: 0.77%, 0.86% and 0.83%). What is correct value?

  8. I HAVE GONE THROUGH ALL VIDEOS ON IRON CARBIDE DIAGRAM, BUT THIS IS THE ONLY VIDEO WHERE I FOUND THAT THE PROFESSOR IS CONFIDENT ABOUT WHAT HE IS TEACHING.

  9. At 18:46 timing, a mistake is there. In Delta ferrite, solubility is high. But sir said, it's lesser than alpha ferrite .
    No doubt video is great.

  10. Prof. R. N. Ghosh thank you very much. These Lectures of IITs proved out to be greatly useful for me. Just some days ago results are out and I'm passed in all subjects. Great credits to NPTEL…

  11. Very suberb explaination all my basic doubts have got cleared now,
    It will really be nice if also a video of tertiary Fe-Fe3C is made

  12. Not worthy, still our Indian Lectures are doing lesson traditionally, it is so boring!!!
    How carbon is to be soluble in solvent like iron,,,,on what basis you are giving assurance whether carbon is going to soluble or not,,,, you should show practical things,,, that is the draw back of Indian country

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