The concepts are very useful and very clear explanation. I have never found like these on internet... Thank you very much sir
@amatoallahouchen58946 жыл бұрын
Professor, your videos are just awesome!!!!!
@sribalabhatta27584 жыл бұрын
Sir,What are the alloying additions those can stabilize the bainite?
@yashmalik83484 жыл бұрын
at 2 am and a night before exam...i am much more relieved now.. thank you so much
@slimshady76254 жыл бұрын
Material technology paper?
@hamza_ME_3 жыл бұрын
Same but at 3:30
@yashmalik83483 жыл бұрын
@@hamza_ME_ all the best 👍
@hamza_ME_3 жыл бұрын
@@yashmalik8348 It's done... :')
@SnuffIt5 жыл бұрын
Thanks for making this videos, are really helpful, and you explained the topics really clear!
@himanshusinghchauhan8845 ай бұрын
professor, what if we use liquid nitrogen for cooling? will we see any change in microstructure different from martensite? thankyou for removing my fear for material sc.
@souravkundu10675 жыл бұрын
simply superb sir☺true reapect from us
@riveshraj27594 жыл бұрын
Thank you so much govt of India for digital teaching lecture free
@yashwanthvenkata9183 жыл бұрын
sir, explain the formation of bainite microstructure?? what causes fine needles??
@AJAYJAISONBTechMEA-2 жыл бұрын
Sir, u are extremely genius
@ratnaraju38763 жыл бұрын
Super explanation Sir...tq
@ps18official153 жыл бұрын
many many thanks!
@LUCKYPURASHWANIBME3 жыл бұрын
Sir, Could you please explain why there is a difference in properties of bainite and pearlite, I mean how does it occur because of the microstructure, I want to know what is happening at the atomic level during the heat treatment process.
@introductiontomaterialsscience3 жыл бұрын
Although both are mixture of ferrite and pearlite, the difference is in there distribution. Pearlte consists of alternating plates of ferrite and cementite. Bainite consists of a matrix of ferrite with fine ditribution of cementite particles.
@MuhammadYusuf-fo6lc2 жыл бұрын
Thank you Prof. you are really helping me a lot.
@pailasaisravan54234 жыл бұрын
sir could you explain how scientist could able to cool isothermally for such long time in the air ??
@introductiontomaterialsscience4 жыл бұрын
The isothermal experiment is not done in the air. It is done in a constant temperature bath. One uses molten salt or molten metal to maintain a constant temperature. It is like, you can use boiling water to maintain a temperature of 100°C.
@zeeshanahmed97195 жыл бұрын
Sir I have one doubt that whether Bainite structure is available at room temperature or not because in diagram (Austempering Heat treatment) we hold at temperature above Ms(Martensite start temperature).
@rajeshprasad1015 жыл бұрын
It forms above Ms and below the nose. But once formed, it can be retained to room temperature. It will not transform to martensite. Thus if Bainite is cooled below the Ms no martensite forms. Only when austenite is cooled below Ms it transforms to martensite.
@zeeshanahmed97195 жыл бұрын
Thank you SIR ji
@amritabanerjee72775 жыл бұрын
Sir your explanation is just incredible!!!!
@ankushsaha0073 жыл бұрын
Sir if pearlite is formed by equilibrium rate means its the most stable form possible then how can if we hold a pearlite for 1 day it turns in spherodite?
@rajeshprasad1013 жыл бұрын
Well the phases alpha and Fe3C are the stable phase but the microstructure of pearlite is not stable. Peralite microstructure has a lot of alpha/Fe3C interfaces. So a large interfacial energy. This interfacial energy is reduced when it transforms to spheroidite.
@ankushsaha0073 жыл бұрын
@@rajeshprasad101 thanx a lot sir🙏,but if spherodite is the most stable form and we can get it by very slow cooling(even more slow cooled than pearlite) from stable gamma,then in phase dia shoudnt we show spherodite instead of pearlite?
@rajeshprasad1013 жыл бұрын
We need to distinguish between equilibrium phases and microstructure. The phase diagram. by definition, gives the equilibrium phases. The equilibrium phases here are alpha and cementite. Thus phase diagram indicates that equilibrium phases are alpha and cementite. It does not tell us whether these two phases appear as pearlite or spheroidite. This we interpret depending upon other conditions. Thus under normal cooling of austenite, these phases form alternating lamellae called pearlite. But if it is heated below the eutectoid temperature, the microstructure changes to spheroidite: spherical cementite in alpha matrix. The phases are still alpha and cementite, their distribution and shapes have changed.
@ankushsaha0073 жыл бұрын
@@rajeshprasad101 ok sir got it,thanx a lot🙏
@mindit985 жыл бұрын
Nice to learn
@purushottam77013 жыл бұрын
Sir, will you tell some specific applications of Bainite?
@sankalp35139 ай бұрын
Rolling element and ball bearings
@juliogarcia62244 жыл бұрын
excellent
@007rwarr3 жыл бұрын
Sir can we have TTT diagram for other points also like for Eutectic and peritectic points?
@introductiontomaterialsscience3 жыл бұрын
Yes, it is possible.
@007rwarr3 жыл бұрын
@@introductiontomaterialsscience Thank you sir for the reply.
@souravkundu10675 жыл бұрын
respect
@adarsh73074 жыл бұрын
best lecture
@mrKumar-mo5ch4 жыл бұрын
I think sir there is no bainite finish??
@introductiontomaterialsscience4 жыл бұрын
Why?
@mrKumar-mo5ch4 жыл бұрын
@@introductiontomaterialsscience cause morphology of lower bainite is similar to martensite and it's hard to maintain Bf tempreture
@rememberthename12383 жыл бұрын
Sir, how can we hold the Gama Austenite without changing it's temprature ? Whether we give heat to remain the temperature same or not?
@introductiontomaterialsscience3 жыл бұрын
There are techniques for holding tempearture constant. For example you can submerge it in a liquid bath of constant temerature.
@rememberthename12383 жыл бұрын
@@introductiontomaterialsscience Thank You respected sir.