Это видео недоступно.
Сожалеем об этом.
Small Angle Symmetric Tilt Boundary
- Добавить в
- Мой плейлист
- Посмотреть позже
- Поделиться
Поделиться
HTML-код
Размер видео:
- Опубликовано: 24 фев 2018
- Small angle symmetric tilt boundary
Комментарии • 26
Следующие
Автовоспроизведение
Ball bearing model to demonstrate defects in crystalsIntroduction to Materials Science and Engineering
Просмотров 15 тыс.
Dislocation cannot end abruptly in a crystal: Grain boundariesIntroduction to Materials Science and Engineering
Просмотров 25 тыс.
Grain Boundaries in Materials (Low Angle Boundaries, Coincidence Site Lattices)Peter Davies
Просмотров 8 тыс.
Men's 4x100m Final | Paris ChampionsOlympics
Просмотров 3,5 млн
Dricus Du Plessis Octagon Interview | UFC 305UFC
Просмотров 865 тыс.
World's Largest Dart Vs Car from 60m!How Ridiculous
Просмотров 980 тыс.
THE WEDDING OF THE LION FAMILYThe Lion Family
Просмотров 276 тыс.
GCSE Maths - Alternate, Corresponding and Allied Angles - Parallel Lines Angle Rules #117Cognito
Просмотров 438 тыс.
Twin boundaryIntroduction to Materials Science and Engineering
Просмотров 64 тыс.
line intercept method for grain size determination worked exampleTaylor Sparks
Просмотров 47 тыс.
57. Grain boundary model, geometrically necessary dislocations & statistically stored dislocationsNiraj Chawake
Просмотров 3,1 тыс.
Screw dislocationsIntroduction to Materials Science and Engineering
Просмотров 102 тыс.
MSE 201 S21 Lecture 15 - Module 6 - 2D & Other DefectsThom Cochell
Просмотров 4,1 тыс.
Characteristic vectors of a dislocationIntroduction to Materials Science and Engineering
Просмотров 67 тыс.
Дыра в ПВО Украины значительно выросла после реализации новых технических решений / #ЗАУГЛОМАндрей Угланов
Просмотров 476 тыс.
иносТранцы @gennady.hazanov #иностранцы #юморГеннадий Хазанов
Просмотров 15 тыс.
Best car sound you ever heard 😳 @MrCarSounds #beatboxCHEZAME
Просмотров 1,7 млн
Angelo Song Tu To Riyal😆 | Brawl Stars #shorts #brawlstarsCaptain Shiraj
Просмотров 1,8 млн
⚡️9 ХВИЛИН ТОМУ! Оточення прийшло до путіна з ШОКУЮЧОЮ ВИМОГОЮ! Його змушують підписати…Телеканал Прямий
Просмотров 2,5 млн
Running With Bigger And Bigger FeastablesMrBeast
Просмотров 95 млн
Hyenas Distracted By Eating a Hippo Get Ambushed By LionLatest Sightings
Просмотров 579 тыс.
As soon as the model is shown, one can easily understand how to connect the two seemingly unrelated topics, namely
1. Small angle tilt boundary
2. Parallel edge dislocation
It was like something was right in front of my eyes and yet I couldn't notice it.
Thank you sir for helping the poor and needy students for free 🙏
Thanks thanks...... A lot,,
I have highly confused about the surface dislocations,,, but now it's totally fine clearrence..
😍 .....🙏🙏🙏🙏🙏🙏🙏🙏🙏
Hi Professor Rajesh Prasad, please, where I can buy this model of a low angle symmetric tilt boundary that appears in 3:23 minutes of this video. Thanks. Congratulations for this videos...
Build your own if you understand the concept or if you are a teacher then make your students to do it👍
excellent lecturrre
How to distinguish between tilt boundary and srew dislocation in real cystal.
in some books given for small angles tan theta can be taken as theta, but while doing problem which one should we take tan theta r only theta..
For angles less than 10 degrees it does not matter whether you use theta or tan (theta).
@@rajeshprasad101Thank you Sir..
Dear Sir, how can we say that distance between consecutive dislocations from opposite sides are half that of the distance in one side? Isn't the better approach is to define the denomoninator term seperately, say, 'h' which is defined as the distance between consecutive dislocations on the one side.
Sir, can't we say tilt boundary as a series of edge dislocation for symmetric large-angle also? If not then why?
Every dislocation has a core where the atoms are highly disturbed from their equilibrium position. This is something which is not captured in the models which I have used. The radius of the core is equal to a few interatomic spacing. Let this radius be r. Now the spacing of dislocations in the boundary plane is h. According to the formula derived for h one can see that h decreases as theta increases. If h becomes equal to 2r then the cores of the neighbouring dislocations will start to overlap and a model in terms of individual dislocations will break down. Thus the model is true only for low-angle symmetric tilt boundary.
According to the book "Introduction to Dislocations" by D. Hull and D.J. Bacon the core radius can be taken to be between b and 4b (p69, 5th. Edn.). If we use h=2b corresponding to to r=b in the formula we get theta =14 Degrees. For r=4b, theta comes out to be less than 4 Degree.
See
Woah!!! Easily exaplained sir.🙌🙌🙌🙌
Sir, why do chemical etchants first attack the grain boundary and not the crystal?
Atoms at the grain boundary are at a higher energy level, due to broken and distorted bonds. Thus to reduce its energy, the metal gets rid of these higher energy atoms at a faster rate.
@@introductiontomaterialsscience Thanks a lot sir for explanation.
Sir, the rotation of axis should be parallel to have tilt boundary but when you are explaining the rotation of axis is horizontal that means it is perpendicular , I didn't got the clarity sir.
The boundary is a vertical plane and the rotation axis is the horizontal line lying in that plane.
@@introductiontomaterialsscience sir if rotation of axis is horizontal than it will be perpendicular to the boundary.. How can we say it as tilt boundary
@@kaspashravani9019 Every vertical plane has a horizontal direction lying in the plane (the intersection of the vertical and the horizontal planes)
Sin or cos ??? b/2d
why is AB 2b?
It is not 2b but 2d. The distance between successive dislocations is designated as d. But the half planes of these come from different crystals. To remain in the same crystal we take alternate dislocations. Thus AB becomes 2d.
Aapko Hindi mein gyan dena chahiye sir.adhik chhatro ko sahayta milegi aur aapka channel kaa lokapriyata bhi badhega .
Dhanyvaad🙏🙏🙏🙏❤️❤️❤️