Wow. Can't believe how clearly this video explains this topic! such fluency and teaching skill. Thanks so much, definitely made today's work easier!

@BillyWu

Жыл бұрын

Glad it was helpful!

You are the best. I've always been confused about the different terminologies used in the microstructure of steels. Journals didn't help that much as they focus on higher concerns. This is coupled with my poor background in metallography. Now this gives me the best foundation to do more research on high carbon steel. Thank you Dr. Billy Wu, you are an outstanding teacher.

@BillyWu

2 жыл бұрын

Thanks. Glad to hear it was helpful!

Great video, straight to the point and explains all the relevant information, thanks! 🛡✨️

@BillyWu

3 күн бұрын

Thanks. Glad to hear it was useful

This is literally the most clear explanation of the differences between pearlite when different carbon %wt is used. Even my apprenticeship papers didn't explain this concept enough for me to understand. Thanks for putting in the effort to produce this video! Now I understand the importance of the Eutectoid point!

@BillyWu

Жыл бұрын

Glad you found it useful

Extraordinary! Thank you. Please keep making more videos of this kind. Thank you again.

@BillyWu

2 жыл бұрын

Thanks. Glad it was helpful

Very well explained for beginners! Great to start with Why and focus on the most important. Graphics are great, too! Well done. My PhD was in TRIP-assisted thin sheet steel, when KZread wasn't widely spread, yet. Exciting to see this medium support people in having access to knowledge and learning. Thank you!

@BillyWu

2 жыл бұрын

Thanks a lot!

The best "Metallurgy" lecture on the Internet. Thanks for the great job! Keep up the quality KZread experience as you are an outstanding instructor. T J (Tom) Vanderloop, CMfgE; 😀Author, Educator & Consultant

@BillyWu

2 жыл бұрын

Thanks for the positive comments :)

wow! this is very simple but impressive explanations of a complex subject about the consequential effect of carbon when added to iron.

@BillyWu

3 ай бұрын

Thanks. Appreciate the comment and glad to hear it was useful

You explained this better than I have seen anywhere, including university. Wow. Thank you

@BillyWu

2 жыл бұрын

Thanks! Appreciate it

You have summarized very nicely my undergrad course I have learnt 25 years ago.

@BillyWu

3 жыл бұрын

Thanks for the comments. Appreciate it

excellent explanation of why hypo and hyper eutectoid steels have either ferrite or cementite forming as 'networks'! was having a lot of trouble with that

@BillyWu

7 ай бұрын

Glad to hear it helped

Thank you for explaining so clearly... You won my subscription.

@BillyWu

2 жыл бұрын

Thanks!

you deserve more likes my friend. thanks for this INFORMATION.

@BillyWu

3 жыл бұрын

I appreciate that!

Never in my life I have properly understood about FE-C diagram, Your Materials Playlist help me to develop the imagination and Thought Process and clear some of my basics Thank You very much May God bless you

@BillyWu

7 ай бұрын

Glad to hear it helped

Very nice explanation

This was AMAZING!!!

@BillyWu

5 ай бұрын

Thanks. Glad to hear it was useful

TYTY I FINALLY UNDERSTAND THIS - MY TEACHER NEVER TAUGHT IT BUT YOU SUMMARISED THE PHASE DIAGRAM SO WELL THANKYOUUU

@BillyWu

7 ай бұрын

Glad to hear it was useful!

Awesome video. Great work!

@BillyWu

Жыл бұрын

Thanks a lot!

Very well explained. Thanks.

@BillyWu

2 жыл бұрын

Glad it was helpful!

Perfectly explained 💯❤️

@BillyWu

5 ай бұрын

Glad to hear it was helpful

Brilliant lecture, thank you very much!

@BillyWu

Жыл бұрын

Thanks. Glad to hear it was useful

Really great video. Amazing work! It would be even better with some references to specific steel alloys etc.

@BillyWu

10 ай бұрын

Thanks and great suggestion. I've got a few more videos in the pipeline and suggestions always helpful

@dizietz

10 ай бұрын

​@@BillyWu I think making this kind of metallurgy adjacent knowledge as applicable and practical is great. There are a lot of people not in the field who can benefit from the distribution of this knowledge via KZread etc. Not everyone has access to simpler tools like a Rockwell test, much less OES or LIBS etc techniques. Knowing the physics behind these things and applying them to common alloys etc is useful. I do wonder if there is data on alloy production volume worldwide that can supplement theoretical foundations to outline most common materials. Additional thought: ie, in the video of the type like on heat treating etc, adding some more b-roll of industrial applications of some of these techniques makes for more accessible content. Thank you again!

Great explanation. thank you.

@BillyWu

2 жыл бұрын

Glad it was helpful!

Good video. Very compleat and well explained.

@BillyWu

3 жыл бұрын

Glad you liked it

This helped a lot. Thank you very much!!

@BillyWu

6 ай бұрын

Glad it helped!

@user-yu5no1ns2m

6 ай бұрын

@@BillyWu I managed to pass the test aswell. Thanks again!!

@BillyWu

6 ай бұрын

@@user-yu5no1ns2m Great! Congratulations

please make more videos explaining metallurgy, you are great!

@BillyWu

3 жыл бұрын

Thanks Abdullah. Appreciate the comment and hope to add a few more videos in the near future

Very useful, thank you!

@BillyWu

2 жыл бұрын

Glad it was helpful!

Thank u! This video will help a lot in my studying for my incoming quiz

@BillyWu

2 жыл бұрын

Glad to hear it was helpful

Incredible lecture!

@BillyWu

3 ай бұрын

Glad it was helpful!

Loved the explanation

@BillyWu

2 жыл бұрын

Glad you liked it

Thank you so much

Great explanation.

@BillyWu

3 жыл бұрын

Glad it was helpful!

so awesome. Thanks.

@BillyWu

2 жыл бұрын

Glad you liked it!

Thanks God, i dont speak english but still understand your video. Thanks so much. Best job

@BillyWu

11 ай бұрын

Thanks

beautifully explained. Thanks a lot Dr. Wu, It will help me a lot for my tomorrow's exam

@BillyWu

Жыл бұрын

Glad to hear it was useful

Prof, may you please give more lessons on Materials related topics 😢, your explanations are so much easier to understand and clear. This really helps me to learn more and better 😊

@BillyWu

5 ай бұрын

Thanks and glad to hear it was useful. I have other content in the pipeline, but am a bit slow producing this at the moment. Watch this space :)

Plz make videos on slippage of carbon atoms in stress strain curve from Civil Engineering perspective🙏

Great video!

@BillyWu

Жыл бұрын

Thanks

Thank you so so much! your videos are awesome!

@BillyWu

2 жыл бұрын

Thanks. Glad to hear they're helpful

Thank you so much!

@BillyWu

2 жыл бұрын

Glad you found it useful

beautifully explained

@BillyWu

2 жыл бұрын

Thanks!

Very effective brief!!

@BillyWu

Жыл бұрын

Thanks

Very well made.

@BillyWu

4 ай бұрын

Thanks

very nice very clear!

@BillyWu

2 жыл бұрын

Thanks!

Thanks!!!

Really good video!!!!

@BillyWu

2 жыл бұрын

Thanks!

Very well done Sir. I found this video by searching for grain structures. For me it is importend to know the relationship between alloys and grains structures versus magnetism. I would like to magnetise a steel alloy to the highest possible magnetic field, and i do not understand which element or phase, or grain structure is responsible for that. Some 100 years ago they used a lot of Tungsten(W) to increase magnetic properties of steel. I don't know if that is the only way. Thanks.

this video was very helpful, thank you for uploading it. also, if i may ask, would you have any info as to how we can learn this stuff without overcomplicating it for ourselves like you have done?

@BillyWu

Жыл бұрын

Thanks. There's some excellent online learning material in places like Coursea. Alternatively, one our new area is to use of chatbots like chatGPT which are quite dynamic in their responses, allowing you to probe areas which weren't clear around core concepts. The approach is still quite new and users should be careful about accuracy of information but for generally well known concepts with lots of material supporting this, it can be a useful learning assistant though I'm still reflecting on the best way to use tools like this.

Do you have a video explaining Martensite?

Very informative video..Pls also make 1 video on Cast Iron.

@BillyWu

3 жыл бұрын

Thanks for the suggestion. Will add it to the list :)

Very useful thank you 😊

@BillyWu

Жыл бұрын

Glad you found it useful

Hello can you make vid about direct reduced iron?(hydrogen reduced iron making process) ? I am very curious about its future and potential

this really helped...

@BillyWu

Ай бұрын

Glad to hear it was helpful

thank you so much

@BillyWu

2 жыл бұрын

You're welcome!

Hi. Thanks for the detail explanation. Can I request a video about stainless steel?

@BillyWu

3 жыл бұрын

Thanks. Good idea. I'll add it to the list and hopefully get round to something on the topic soon

finally understand thanks

@BillyWu

3 жыл бұрын

Glad to hear this video helped

Waw that's awesome

Hello :) Thanks a lot ! However I have two questions, - At the eutectoid point when the steel is cooled, does austenite remain, I don't understand (at 11:39 the photo on the left shows austenite but the one on the right doesn't). - I was wondering if pearlite appeared at any carbon content or if it was only near the eutectoid point?

@BillyWu

3 ай бұрын

Great question. The key with phase diagrams is that they represent the thermodynamic state of a system (i.e. if you had infinite time for the atoms to vibrate around and find their ideal spots, what would the structure look like). From a thermodynamic perspective, once the steel is cooled below the eutectoid temperature all the austenite gets transformed into pearlite like the inset image on the phase diagram. The left image there was meant to show what a structure might look like as the pearlite is growing from the austenite, so it more of a non-equilibrium structure. When cooling more rapidly sometimes you get other phases like martensite. Also, pearlite can appear at different carbon contents, not just the eutectoid composition. If you have less or more carbon, you get pearlite but held together by either soft ferrite or hard cementite, respectively for a hypo- and hyper-eutectoid composition.

@The.Wonderful.Inspiration.Of.

3 ай бұрын

Very clear and informative thank you very much !

watching this video like reading a whole of book.. good job..

@BillyWu

Жыл бұрын

Thanks. Glad you found it useful

Fantastic

@BillyWu

2 жыл бұрын

Thanks

THANK YOU THANK YOU THANK YOU

@BillyWu

9 ай бұрын

Glad to hear it helped

amazing

@BillyWu

10 ай бұрын

Thanks

When I saw the Minecraft Iron and Coal, I knew it was going to be a great video!😁😂😅

@BillyWu

Жыл бұрын

Thanks :)

@ Billy Wu I’m currently doing my CSWIP 3.1 and all the literature i’ve read states the austentic region starts at around 723 deg ?

@BillyWu

Жыл бұрын

Hi Nick. The reference text book I normally like to recommend is Materials Science and Engineering: An Introduction by William Callister. The adapted iron-carbon phase diagram in this video was based on this which shows a Eutectoid temperature of 727 °C which is broadly aligned with your value.

Good thanks

@BillyWu

2 жыл бұрын

Thanks

at 1:07 there is a tram which i take to work every single day in Budapest, Hungary lol. Jó öreg kettes villamos

@BillyWu

5 ай бұрын

Ah great to know! Budapest is an amazing city

Bruh here I am paying high tuition for college while just learning every material on youtube!!

@BillyWu

11 ай бұрын

Glad to hear you're finding material like this useful. Online videos are a great teaching assistant. In-person teaching at college/university, though, I still think has a lot of value with peer-learning, problem-based learning and feedback which is still something with online learning that we haven't fully cracked yet

Nice vedio make vedio on ADI material

Hi sir Proetectiod ferrite How it looks like in 3D Please make it visualise

Can you help me understand the time-temperature-transformation diagram and the terms related to it? Please please please

@BillyWu

27 күн бұрын

Sure. Here's another video where I discuss different ways of strengthening metals, including heat treatment and TTT diagrams kzread.info/dash/bejne/aaCBj7ttiNHKo6g.html

thank youuuu

@BillyWu

5 ай бұрын

Glad it was helpful

When the temperature reaches to 910 degrees Celsius another phase change occurs from FCC non magnetic (Gamma iron) to bcc non magnetic ( beta iron ). Finally at 767 degrees Celsius ferrite(alpha iron) becomes magnetic without change in lattice structure.

@met0578

7 ай бұрын

Reply please

Why does Iron have BCC phase at high temperatures, then it transforms to FCC ehrn it is cooled, and then again to BCC as it is cooled further?

Thank you very much. I would wish you are my lecturer in real life 💕

@BillyWu

Жыл бұрын

Glad to hear it was helpful

Professor I have question.If you were asked why Fe-C phase diagram is so important ,what would you say?Could you give me a short explanation.

@BillyWu

5 ай бұрын

Good question. The iron-carbon phase diagram is important mostly because steel is one of the most commonly used engineering materials and as such we need a good understanding of how composition affects properties towards making the right material selection/design.

@yigitcanbaysal824

5 ай бұрын

@@BillyWuOh thank you professor.Plus ,I have one more uestion if it's possible Maximum solubility of carbon in FCC iron is 2% but steel is produced below 1.4% carbon and cast iron is produced between 3-4.5% carbon. Why?

Medium carbon steel is used only for woodworking cutting tools, railway tracks is not always high carbon steel but medium carbon steel. You mentioned cast iron pans and machinery so gray cast iron is not extremely hard but rather soft because graphite in soft ferite matrix and machinability is good. White cast irons is extremely hard but not used far kitchen pans...

3:22 when i saw Minecraft iron icon i knew its going to be serious video😂

@BillyWu

9 ай бұрын

:)

This is a tough subject, how long did it take you to understand it completely

lovely info but you forget that an alloy means that it consists of 2 or more metals as a base before carbon is added

good job to whoever named "cast iron"

@BillyWu

Ай бұрын

🙂

The minecraft blocks were a nice addition xD

@BillyWu

2 жыл бұрын

haha thanks

Its important because purifing iron from carbon is very expensive

What is Martensite micro structure

@BillyWu

2 жыл бұрын

Due to the rapid cooling of the steel, martensite generally has a very fine grain structure, with needle-like grains. The Wikipedia page has some nice additional information and an image of this. en.wikipedia.org/wiki/Martensite

What makes spring steel what it is?

@BillyWu

2 жыл бұрын

Good questions. There are various types of spring steel as shown in the Wiki link (en.wikipedia.org/wiki/Spring_steel) most are low-alloy manganese, medium-carbon steel or high-carbon steels, with this composition giving high yield strength which leads to its use in a range of products.

@tedarcher9120

2 жыл бұрын

@@BillyWu i mean, why does spring steel have almost no plastic deformation compared to mild steel?

Wow

@BillyWu

2 ай бұрын

Thanks

U saved me❤️🥹

@BillyWu

Жыл бұрын

Glad it was useful

我操，讲的挺好

I saw the graph and got instantly confused

Clears throat

Help

Prof : can I get your email please.. I have project in annealing

This is absolutely amazing video,straight to the point,i appreciate for your effort and ime Prof Wu! God bless you!

@BillyWu

Жыл бұрын

Glad it was helpful!