interesting.

Do you know if a brass fitting screwed into an aluminum gas tank would create corrosion? Thank you for you video

Based upon your discussion (apart from the Michelle O) references) lol I just purchased your book Looking forward to reading it I have dozens of fracture mechanics books and teach fracture mechanics where I take a holistic practical approach Lets see how it goes from what I just saw on your brief introduction I may put your book in my class Fairfield university school of engineering

Great summary. I agree we need to understand toughness better.

I'm interested in tempering embrittlement. Some of the higher tempering temperatures on the graph seemed high and I thought could cause embrittlement. (I'm still learning...)

Thanks for the explanations and data points. Really good information.

As a former machinist these two factors we always under consideration. The material determined the tooling use to machine it. These are topics that most people never consider unless it is their profession to do so. Thank you.

Ditch the imperial system and let's use the metric system x) Very interesting tho!

Interesting, thank you.

7018 baby!!😉

I appreciate this information. As I watched, I was reminded of an eye bolt (10mm x 50mm, 300 series SS) failure that occurred during some testing. The information provided in this video will be very helpful in case of another failure. Thank you.

Superb exposition of the importance of FA!!!

Thank you for making this video. Fantastic information. Cheers!

very clear explanations, yet technically correct. Easy way to understand heat treating of steels, and its objectif

😂 But seriously, yes, looking forward to reading the book!

i have bought both books and it gave me a nee dimension for maintenance repairs

If you didn't get the notification when this video was posted, try unsubscribing and re-subscribing. I can't take credit for coming up with the idea, so don't ask me why it works.

Detailed explanation!

Awesome video. Please do a follow up show examples and applications of each type in the real world.

Amazing video Shane

Very interesting and we'll explained thank you!

Great presentation! Thank you! :) I find it interesting (and a bit amazing) that much of this is what a blacksmith might do by a combination of intuition/experience/feel.... working with a crude piece of metal of unknown alloy, needing it soft to work with, but needing some strength/hardness in the end product.

Excellent, concise video.

It's funny, but as a former machinist, I could hold two piece of steel, one hardened and one soft, and could tell you which piece had been heat treated. This topic always fascinates me. Thank you.

this is very good work. would you consider doing a similar video on stainless?

THAT! Was an excellent explanation! Thank you. Please keep going. Maybe compare 1045 to other steels and their heat treated properties. Like 1095, 4140, and throw in some tool steels too. Thanks again!

Awesome. Great content with clear concise explanations. Thank you.

Super clear explanation, one of the best I’ve seen!

The all or personalized option on the subscribe button is not working.

Why this channel is not getting an insane amount of views is beyond me. This information is gold. Especially for people that have basic understanding of the matter, but do not want to dig waist deep into the literature.

Great work!

Brings me back to my days in the QA lab at a heat treatment facility. I always remember martensite as it has that thatchy/woven look to it under a scope. Great video!

Great video as always! Heat treatment has always been a bit puzzling to me as a lowly mechanichal engineer, so the explenations presented here are really helpful! Here's an idea for a future video: how do the different alloying compounds such as chrome, sulfur, phosphorus, etc. affect the steel's properties? Never had em all explained in detail before, so a video on that would be great!

this begs the question, would some type of corrosion protection (ie paint) have slowed down, or stopped the reaction? I've been a welder for years, I now know rust is a supernatural phenomena lol. Or at least it appears so. I've seen rust form under oiled steel, inside sealed parts that were welded 100% or so I thought. and millions of other things. I used to build fire truck ladders. Every single weld was magnafluxed, and cleaned before a coating was magnetically, or electronically applied. I never understood the process fully. They didn't rust as much, but repairing old fire truck ladders showed me that even a small amount of cold lap (from other welders not as skilled as myself lol) would induce rust. I've built fire trucks, concrete bins, farm equipment, and etc. I know galvanizing doesn't hold up to fertilizer of any type, but mild steel holds up even worse. Stainless is an improvement, and can with maintenance hold up, but is not bulletproof. So my question is, what can you tell us about corrosion protection? I hate seeing my beautiful creations out of wonderful all purpose tuff steel flake away into oblivion till they are so weak you could punch a hole in them with your finger.

wtf I've never seen an aluminum bolt

Just bought it. 🫵👍

The continuity of atomic attraction.

Thank you for an interesting test. Can you run this test using stainless steel bolts? Something in the 300 series?

A very good introduction to steel microstructure, alloying elements, heat treatment, and strength. What I didn't see was the effect of brittle failure due to not tempering the quenched steel. Or the iron-carbon diagram every strength of materials college class goes into in its first course. Nor the crystal structure, body centered vs face centered and why they are important. Nor why the alloying elements are important in stopping the migration of voids in the molecular structure to stop "micro-cracks" from growing. But that's Strength of Materials 307, a senior level course, not 101 entry level.

Now make it 100% acid

Interesting stuff! the pitting seen on the bolts would surely cause massive leaks on any sealing surface. I wonder how acidic liquids are transported when it basically eats the steel for breakfast. are there certain alloying compounds that would prevent/mitigate such corrosion?

Cool stuff!:)

Interesting

Wonderful! Thank you so much.

When I rebuilt my '65 Corvair's suspension I used grade 8. Or if Genera Motors thought it was necessary to spend a few cents more, it is necessary.

So hard watching something containing science and math but using psi and inches. So unrelatable, you can't nonchalantly adapt it to any other situation a normal human encounters, it's always cumbersome, complicated and ugly.

Very interesting. I would have liked to see the image of the grade 5 bolt after retemperimg.

🎉 thats not true. To much carbon makes steel brittle . steel has only .02% carbon. We are carbon based creature because Carbon is the only element that when heated the resistance value is reduces. Meaning . carbon is so dense that when loosened up with heat the volts can pass esier through it. 😊

I find this topic very interesting indeed. But i think it would be much more appreciated if metrics conversion were added inside the video (could be as subtitles/additional texts or even voiced/verbal conversion) I think this could help the channel to grow more and reach far outside U.S.

Very well done. I have been studying steel alloys and their uses for several years now with all different sources of information. This is one of the best to recently cross my screen! Even though I know much of what he said already, just a little different explanation makes a big difference to me and deepens my understanding of the subject. Thanks a lot.