You were born to be an excellent teacher! Any difficult subjects become quiet easy to understand with your explanation!

dear professor, i enjoyed learning through your lectures. thanks for your effott. from psg tech

Thank you professor. Your lectures are quite helpful for me as a beginner in material science!

you're so good at explaining things. thank you. 😭

Loved this. Really well described.

Such poise and clarity! Thanks for the knowledge sharing sir. Wish u do more videos on other engineering disciplines as well.

Sir, I am big fan of yours, I like the way you deliver lectures....respect!

Thank you so much Sir!! I have covered all your lecture of MBM. and understood easily . Good explanation. Thankyou!!😊

Thank a lot Sir making this difficult topic is like " Piece of Cake " for us...Hats off to your teaching it is indeed paving my way in my teaching profession..

I regret watching your videos, 1 week before my exam, should have started a month ago. Too good sir, thank you soo much 😄

Excellent lecture!

Very good sir. Your teaching art is excellent.

I really understood the subject. Thanks sir

Sir the way you have explained to us was really very helpful for everyone .Thankyou sir and Thankyou so much for sharing such a good knowledge with us

Thank you sirrr,, this is so helpful for my finals

great Sir, understood easily because your way of teaching is awesome---From University of Toronto

Press 1 a couple of times, it will make you day. Sounds like yoshi :)

sir u taught very well. thanks sir

Sir...thank you for your effort ❤️

Thank u sir for ur excellent explanation ❤️

Thank you Sir.

Thank you sir for all lectures

Perfect

thank you sir

Thank you Sir for making these videos. I have a doubt, why all these creep mechanisms appear more like temperature-dependent mechanisms instead of "time" dependent mechanisms as suggested by creep definition?

@adityapratapsingh7382

3 жыл бұрын

Also, if there is any role of temperature in cross slip, and what is the criteria for the cross slip to occur?

Sir, where should be coble creep in the map? It happens at low temperature

Sir, Good morning 🌞 Where can I get peierls and Navarro related stress topic.

Hi sir. Why gb sliding mentioned is not mentioned in the plot, in which region it will occur?

@introductiontomaterialsscience

4 жыл бұрын

This is indeed a good question. I have used a simpler form of mechanism map by M.F. Ashby. This was first proposed by him in M.F. Ashby, "A First Report on Deformation Mechanism Maps", Acta Metallurgica, Vol 20, Issue 7, July 1972, Pages 887-897. This is also described in his book. This is also described in his book M.F. Ashby and DRH Jones, Engineering Materials: An Introduction to Their Properties and Applications. However, he has not included GBS in his figure. I simply followed him because I did not pay attention to. Your question forced me to look up literature where I find that, later, other workers have proposed maps that include GBS: H. Luthy, R.A. White and O. D. Sherby, "Grain Boundary Sliding and Deformation Mechanism Maps", Materials Science and Engineering, Volume 39, 1979, 211-216. Thanks for asking.

sir can you explain why coarse grain structure is required for high creep resistance

@rajeshprasad101

4 жыл бұрын

Grain boundary sliding is reduced. Also diffusion distance increases.

SIr you are good teacher jealous down

Sir please explain why grain boundaries become weaker than grains at higher temperatures?

Sir, why does dislocation bowing not taking place here ie kindly tell that when does cross slip takes place or climb takes place and when dislocation bowing takes place #Rajesh Prasad introduction to material science and Engineering

@rajeshprasadlectures

2 жыл бұрын

Each mechanism requires its own stress. The one requiring minimum stress will operate.

@letslearnmechanicalengineering

2 жыл бұрын

@@rajeshprasadlectures sir does dislocation bowing takes place in case of screw dislocation

@letslearnmechanicalengineering

2 жыл бұрын

@@rajeshprasadlectures many thanks sir

@rajeshprasadlectures

2 жыл бұрын

@@letslearnmechanicalengineering It is possible for screw dislocation as well.

@letslearnmechanicalengineering

2 жыл бұрын

@@rajeshprasadlectures one last request sir kindly make course on topic like welding or metal cutting and machining, so that underprivileged students like me , who are preparing for various exams like ese get benefitted, in the same way as material science Thanks a lot sir.

Sajith Premadasa moda buruwek ! Manusha Nanayakakara aye poster gahai da danne na puka hodamu kiyala :D :D

@rajeshprasadlectures

3 жыл бұрын

Could you please translate it for me.