Introduction to Materials Science and Engineering

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@PradeepKumarRanammd 3 күн бұрын

is it the potential energy of the system that is decreasing? Because according to the law of conservation of mechanical energy if an isolated system is subject only to conservative forces, then the mechanical energy is constant.

@anandhanagarajan9995 4 күн бұрын

No one in the world they never teach like you

@vishnut2862 4 күн бұрын

👍

@deveshkhanna6926 12 күн бұрын

Finally completed Material science series for ISRO Scientist Interview Prep. ❤🎉 Great Journey by the way. Thanks professor 🔥✨

@introductiontomaterialsscience 9 күн бұрын

Best wishes for your interview.

@delaneymcneese2731 13 күн бұрын

If creep is considered a high temperature phenomenon, how is it a factor of glacier movement?

@introductiontomaterialsscience 9 күн бұрын

High or low temperature for a material is relative to its melting point. For snow even a temperature of -20 C is rather close to its meting point and so it feels hot!

@soumitravelvlogs2782 13 күн бұрын

In martensitic transformation the amount transformed is dependent only on temp not on time

@introductiontomaterialsscience 9 күн бұрын

@soumitravelvlogs2782 14 күн бұрын

1. Advantage of TTT diagram over Iron-Iron carbon diagram - Has time axis 2. Disadvantage of TTT diagram over Iron carbon diagram - TTT diagram for only single composition

@soumitravelvlogs2782 14 күн бұрын

Why coarse grain in annealing and fine grain in normalising 19:20 -Annealing occurs at higher range of temperature and Tempering occurs at lower range of temperature. - At higher temperature I. E. Annealing - growth rate dominate nucleation, so coarse pearlite are formed - At lower temperature I. E. Normalising - nucleation dominate growth rate, so more nucleation occurs than growth, so fine pearlite formed.

@soumitravelvlogs2782 14 күн бұрын

Why C curve? 11:12 to 12:57 -Initially (near TE) Driving force is less but atomic mobilisation is high -Finally (near T=0C) Driving force is high but atomic mobilisation is very less

@globulidoktor1733 16 күн бұрын

truly a gem for any materials science student

@JewTube001 18 күн бұрын

what a creep

@laurynokojie2145 18 күн бұрын

Thank you very much sir, i would love to ask a question Is this all one needs to understand concerning flicks law?

@introductiontomaterialsscience 9 күн бұрын

In any field of science, you can never say that you have learnt all there is to learn.

@joshebramjoseph2954 22 күн бұрын

how can liquid exist below its freezing temperature i mean by that time everything would have been converted solid itself right how will nucleation occur below Tm as what i understood was freezing will occur till complete liquid changes to solid and until then T will remain constant at Tm

@introductiontomaterialsscience 9 күн бұрын

What you are stating is the condition of equilibrium solidification where the entire solidification can happen at the melting point. But this requires an extremely slow cooling. If you cool rapidly it is possible to retain liquid, for some time, in metastable state below the meting point before it starts freezing.

@Emad8452 23 күн бұрын

Very nice explanation, thanks

@joshebramjoseph2954 23 күн бұрын

@24:72 this fraction is valid only at that particular temperature right .i.e, the lever should be made corresponding to the equilibrium temperature in question right?

@EhenewTesfaye 25 күн бұрын

Tank you sir 🎉

@zakriyasaleemadv7635 25 күн бұрын

What will be quenching temperature?

@magkat7922 25 күн бұрын

Thank you so much sir 🙏🏼

@magkat7922 25 күн бұрын

Great explanation, thank you sir. I got to understand fatigue better

@daksh_fluorosulphale Ай бұрын

Best lecture ever in NPTEL on material science and engineering

@Chernoby100 Ай бұрын

Спасибо. Очень наглядно и понятно. Один только вопрос - если в роли матрицы будет выступать композитный полимер, выплавленный из LFT-G -гранул (композитные гранулы с длинными волокнами углерода/базальта/стекла), а в него будет добавляться керамический нано-аддитив по типу нитридных или карбидных нановискеров, то это будет гибридный нанокомпозит с несколькими фазами (нано- и макро-фазы)?? Или же это будет полимерно-волоконно-керамический нанокомпозит, как пример GFRP-LFT-G-nSi3N4 (матрица - сплавление в лист гранул LFT-G TPU/RTPU + LGF, а добавляемый наноаддитив - нановискеры нитрида кремния)?

@user-nm4fm6qy9w Ай бұрын

God tier ✅

@TimeEnergyConsciousness Ай бұрын

This video blew my mind, will understand it slowly over time.

@joedacaptain Ай бұрын

thank you sir

@pauljongen3022 Ай бұрын

Come on Paul, let's play with the Buckminster Fulerenes.

@lilly-ct6mk Ай бұрын

Wow! thank you sir!!! May God bless you!!

@TimeEnergyConsciousness Ай бұрын

Sir, why volume constancy is valid in plastic deformation ?

@introductiontomaterialsscience Ай бұрын

This is good question. I think we can say that this is an experimental observation. The atomic mechanisms of plastic deformation are consistent with this fact. So in slip one part of the crystal slides over the other part and so the volume remains constant. In twinning, the crystal reorients itself, again keeping the volume constant.

@TimeEnergyConsciousness Ай бұрын

@@introductiontomaterialsscience thank you Sir, got the idea. (it's a question asked in BARC interview)

@gajahmada9539 Ай бұрын

I want to be a jet engine engineer that’s why i am studying hard hope i can make it🙏🏻

@wafaamohamed1937 Ай бұрын

Thanks professor

@redeye1114 Ай бұрын

Nice explaination on Nacl . Thanks sir .

@redeye1114 Ай бұрын

8:25 "Armstrongs seems to be quite headstrong " 😂😂😂

@introductiontomaterialsscience Ай бұрын

I have made two mistakes in this video : 1. I have considered Trigonal and Rhombohedral as synonyms for the same crystal system. However, as per the International Tables of Crystallography Vol A it.iucr.org/A/ the two terms are NOT synonymous. Crystal System should only be called Trigonal and not Rhombohedral. 2. I have shown only one Bravais lattice in the trigonal crystal system. But in reality there are two Bravais lattices in the trigonal system: hexagonal prinmitive (hP) and hexagonal rhombohedral (hR). And so there is no trigonal P Bravais lattice as shown in the table in this video. I plan to make a video to clarify this. Wil share the link once I do it. You can check en.wikipedia.org/wiki/Crystal_system.

@skbarnwalshorts9654 Ай бұрын

Iam student of NIT Jamshedpur Also my professor coppied your teaching material thank you sir for providing this complete course

@getrudelongwani6924 Ай бұрын

Do you just draw the tie line on how and anywhere?

@armanhussain7369 Ай бұрын

13:56

@muhammadsheharyar3506 Ай бұрын

Thank you Sir. Which book you recommend which covers all of “introduction to Material sciences “ chapters in a same easy approach??

@kuldeepshukla1797 2 ай бұрын

Sir u cleared my all doubts. Infact i didnot get this much knowledge by reading rolfe and barsom. Hats off to ur explanation

@azadarhussain301 2 ай бұрын

Thank you so much Sir❤ you made it easy 😊

@KanikaBijalwan-pr9oi 2 ай бұрын

What is free surface?

@introductiontomaterialsscience Ай бұрын

As the title of the video says, free surface is the external surface of any body.

@jaswanthkumar8157 2 ай бұрын

Sir In the entire Strength of materials we study is Engineering stress or True Stress or both?

@introductiontomaterialsscience Ай бұрын

In the strength of materials we usually confine ourselves to elastic regime. In the small strains corresponding to elasticity there is not much difference between true and engineering stress. The difference becomes significant only when the strains are large, like in plastic deformation.

@jaswanthkumar8157 2 ай бұрын

Finally i came to know the difference between Engineering stress and True Stress