engineerguy - 2018-10-25
Bill demonstrates the temperature-dependent shape memory of nitinol metal. He explains how "twinning" in the crystal structure of nitinol produces the memory effect. He shows a nitinol-based engine that is powered by temperature differences. He closes the video with a description of superelasticity, a phenomenon related to the memory effect, which he demonstrates with a cardiac stent. (This video is dedicated to my second son: born right after the rough draft was finished, and who, thus, delayed the filming of the final video by eight months.)
Worth the wait - now off to ebay ...
Oh, GRBTutorials .. I think you mean I have a verified tick? All verified creators do.
@engineerguy Oh, nevermind. It seems it was just a temporary error. I meant the grey background behind the channel's name, which for some reason appeared in this comment. YouTube is so buggy :/
Np
@GRBTutorials it just needed to be heated to 75 or so now its back in shape
I once received a call from a guy, he wanted to buy some thorium! I asked him to check ebay!
Nice to see a new video. It's been a while.
Those meddling kids again...
Congrats!
@engineerguy congrats
@engineerguy nitinol is electrically conductive and reshaped with electricity, but is it capable of storing data for computers, could they make a CPU that is compose of nitinol and instead of bottlenecking once is hot, maybe it could allow it to increase the productivity, it could potentially be used in CPU to withdraw heat(heat dissipation) and allow memory storage as well permanent memory storage.
@engineerguy congrats on 16 months
Welcome back, Bill. We have missed you. I hope your family is well.
Is that a threat?
Deus Vult. Shhhh, if u want to keep seeing uploads.
Deus Vult. How is this perceived as a threat?
Who's Bill? Use inbox
I never knew about that Nitinol and was pretty suprised when that spring bent itselfe back!
But even more suprising is that engineerguy doesnt seem to age...
we are all star stuff
@roidroid
I had something different in mind.
He has nitinol implants under his skin
The force is strong with him
Well he's digested a spring or two in his days.. ; )
I need nitinol bumpers on my car...
@Sadut Khan wish i was here before to say "Im waiting for the smartass to say that you cant do that because _________"
So you want to pay $20k to repair a bumper instead of $200?
Maybe you just need a better driver m8
Nitinol body panels
You need a self-driving car which have the sensors to detect things around it so there will be no more crush //
Years ago, nitinol eyeglass frames in really cold winter air lose rigidity. They almost became floppy. A bit awkward when you'd like them to stay on your face.
I had such glasses as a kid in the 80s. And yes, I remember them becoming wierdly deformed in winter once. I never really thought about it until I read this. :D
@snaplash Why would Nitinol be a selling point for a frame? I really don't see the reason.
@Hard Case As said in the video, they are pretty resistant towards compression and bending, so if you were ever to unknowingly sit on your glasses, or step on it, the frames would not be damaged. It has its merits, but conventional frames are better if you ask me.
@James Chong I bet that using any alloyed spring steel would also be very resistant to deformation. Using Nitinol just doesn't seem like a practical investment.
@Hard Case It does not seem practical because you may be living in a place were the temperature fluctuates to the extremes. As most metals, when exposed to low temperatures they become brittle. This case is moreso observed in Nitinol that is why Nitinol glasses mainly break in cold climates, but if you are living somewhere relatively warm then it is a pretty viable pair of glasses. In addition, If you still decide on buying Nitinol glasses, I would recommend buying high quality ones since impurities create weakpoints that may break over time.
So that's how cardiac stents retain their shape! Thank you for this!
As I sit here 'hosting' three of them, I'm pretty grateful - eight years & counting - Nitinol eh? One for the pub quiz : )
Lod dude Good for you and the scientists that worked all this out from the metallurgists to the physicians and all of our loved ones even if it only me, lol.
Cheers from John, Australia.
It is uncommon for cardiac (coronary) stent to be made of nitinol. It is not necessary due to 316L and L605 alloy, which are more affordable than nitinol, being good enough to withstand the pulsatile strain in the coronary artery. Nitinol stent however is commonly used in areas with high strain or tortuous section like femoral artery, or if removal is desired like in IVC filter.
Source: I work in the industry
Stephen Abracadabra beat me to it. Most of our coronary stents are cobalt alloy. We do however implant an aortic porcine tissue valve which has a reticulated Nitinol frame and is delivered transcatheter like a coronary stent. Slightly larger catheter though (16F)
Got in a car crash and had a heart attack when crashing? Save your life and your car!
Car gets dumped in hot water and boom its fixed!
Heart attack boom cardiac stent
Did you know you can run electricity through it to make to heat it up too.
@st1300 r Thanks for the reply, I am familiar with the bi metal principal of thermostats as they are used commonly in hot water systems in the form of a button. One is to turn on the element and heat to nominal temp and another is a safety to cut supply to the system if the first thermostat fails and heats too much.
Platinum wire for the car air flow sensor is correct, I remembered wrong , when I read you comment I had my memory refreshed, thanks for that.
I will try to look up the thermostat for cars thing again as I still feel that the ones I have seen are described in the information on nitinol in other references to this material.
Cheers from John, Australia.
Barring being in a super conductive state, every material heats up when you pass electricity through it because of resistance.
The day you stop learning new things is the day your brain starts to die.
Thanks to you and Bill, I'm good for a couple more days :-D
@engineerguy aww, I was starting to think you just knew everything
I do know everything, but I don’t want to show off
Congrats on the baby boy sir!
Thank you
@engineerguy wait you have a baby, an heir to the engineerguy throne?
One of the most consistently excellent channels on YouTube
Great content, but I could listen to you read a phone book and be transfixed.
Agreed. Definitely has a radio announcer voice.
"I'm Bill Hammack- the coolest damn guy on YouTube"
Nope hes not
No, Yhe Sci-Fi guy is, because he's corrupted by major industries.
Yes he iiiiiis
The only channel I allow notifications from!
@Jan van Coppenhagen thanks for the recommendations, I added some videos to watch later, I'll probably subscribe to the science one, overhauling cars is not my sauce but I'll give it a try.
I don't know of any videos from smarter where he talks about cars, really. I would like to form my opinion on it if you can tell which video do you refer to. Thanks!
@Jan van Coppenhagen LOL I was really surprised that smarter every day could do something like that xD he is so humble whenever he meets smarter people than him, and I think he is really genuine.
Thanks again for the Science Asylum recommendation!
@Jan van Coppenhagen he has a doppelganger? O.o
@Lucas 'Ktulu789' would add real engineering, and City Beautiful (more civil engineering),
for Space stuff including engineering, I would add Scott Manley, and The Everyday astronaut
I don't allow notifications but once accidentally left notifications on for Efence and was wondering why Efence kept coming up. 😂 until I corrected that. 😑
Couldn't believe my eyes when I saw the notification. Best content on Youtube! I watch the aluminium can video like twice a year!
OmegaScathach Only twice a year. Recommended viewing at least once every month. Preferably with a nice cold beverage in an aluminium can in your hand.
That one really is a pure classic! One of the few science videos I regularly come back and watch once or twice a year, along with Scishow's most deadly chemicals one, their one on the different artificial sweeteners, and the Vsauce Deja Vu video!
Haha! I suggested on Patreon that Cody from Cody's Lab mention this video, and he did!
I hope you get a bunch of new fans, I've loved this channel since the instant I found it!
Im here from cody's lab as well.
In all seriousness, you should switch off Patreon when they erect the new content creator friendly one being made to compete...
I watch a lot of Bill when he was in the university videos.
Illinois 1867
https://youtu.be/_xBlc-VGgKo
I'm here from the YouTube Algorithm finally sending me something awesome!!
The Engineer Guy should totally hang out with Destin from SmarterEveryDay... They'd be instant best friends guaranteed!!
I'm curious now to see a SHEET of super elastic Nitinol
During the 1970s or 1980s many people were convinced this would be used to make functional heat engines. Today Nitinol is commonly used in orthodontics.
@Pilot16H thanks very much!
@Pilot16H
sucks for people with nickel alergies.
@Windhelm Guard I didn't know that was a thing. I imagine they simply use stainless steel.
@Windhelm Guard
-depends on the exact composition of the metal and how tightly bound the nickle this metal is as Titanium is very good at reacting with oxygen it tends to cover up problems with other metals leaching from it , but then again some people react to Titanium as well as surgical S/S hence the continued use of gold in dental work
Orthodontist here. We usually start off with NiTi wires to engage all of the teeth. Just like in the video, the initial shape of the wire is a curve arch form. When you engage all of the brackets, you have a zigzagged-looking wire. Most orthodontic wires have transition temperatures in the room temp to body temp range, so they're reactivated in the mouth to go back to their nice arch form shape.
After some initial aligning, we then go to stainless steel. As someone asked previously asked, yes, some patients do have nickel allergies. We have an intermediate wire that is a titanium - molybdenum alloy that possesses both flexibility and rigidity. It's a nice wire to finish on, but can be used initially in patients reacting to NiTi adversely.
What an awesome way to start the day!
How does the efficiency of the nitinol engine compare to a sterling one?
Not very efficient considering the energy lost in heating water. Still super neat though
Id be curious to see how many joules of thermal energy is absorbed to reach max speed. Theres mire efficient ways to heat things, like with current. Niti is resustive compared to other alloys
The thumbnail made me believe this is a Nile red video
It's always a pleasure to listen to this guy talk.
Matt Roszak
whoa shit you're the rpg game guy
Protip for any wannabe psychics and people who just want soup to be exciting again: There are spoons made out of this stuff.
My mother would have loved that, so that if I took ages to eat the soup it'd grow cold and the spoon would get all floppy
Did anyone else get optical illusions from the pattern of spheres starting at 1:59 ? If you focus on one sphere, the others appear to move slightly.
Why doesn't the nitinol spring at the beginning exhibit superelasticity when you stretch it?
In the case of nitinol specifically, the atomic ratio of nickel and titanium dictates whether it's shape memory or superelastic. A change in about 0.1 at% nickel results in a drastically different transformation temperature than before.
Always delighted to see a video from you. Thanks again for all the great content!
Cody's lab sent me here, I was curious how it worked after seeing him use it, Thanks
Always with the "coolness" of science, and the great explanation of why it works as it does. Many thanks good sir.
I'm a dentist.. and that's why I clicked this videos...
Clear and concise, as always. Thank you.
You're back, yay!
The part about the stent was super interesting
Nice to see another one of those amazing videos.
Was worth the wait.
Well isn't this a sight for sore eyes!
Entropy, our old enemy, turned to serve us—I love it!
shape memory alloy, the only thing i remember from my childhood. MGS
Welcome back, engineerguy!
I would love to see a blog about how things on your side are going ^_^
Thank you YouTube Algorithm for finally recommending me an awesome channel.
Thank you Engineer Guy... Huge respect... I feel like Im in the year 2035... Btw... Will this make my guitar stay in tune for ever???
Great vid and topic.. Quick question, what is the deterioration rate of the metal reshaping back to the high temperature form? Or in other words how many times could it be rated for returning to the high temperature state?
Depends on the size, how much it gets deformed, and the Nickle-Titanium ratio. However, as long as you stay within a certain stress percentage, there is little-to-no metal fatigue and it can return to its original shape for a very long time.
Absolutely brilliant as usual! Thanks for the brilliantly presented info, you and your team are amazing.
BILL! BILL! BILL! Bill Hammack the Engineering guy!
Welcome back Sir!
To all the young YouTubers that speak with cringe-worthy nasal tone and vocal fry:
Listen to this fellow Bill's superb speaking voice, and learn.
During the golden age of television and radio, his cadence and delivery modulation were a prerequisite for any broadcaster. Why is he so good? Simple. Like a great operatic singer, he understands the importance of controlled breathing and using his diaphragm - to elicit a superior resonance and gentle yet commanding tone.
A joy to listen to, really, this is.
It is possible for one to appreciate the past without having to curse the young under your every breath. This entire website was built by the "nasal-toned-vocal-fried-youth". Don't take it to heart, but you do come off as a cranky old man or one deluded youth with a faulty understanding of the past.
@Zarif Safwan Hoque Many empires have started in basements or garages, and they have nothing to do with the quality of speech and proper articulation. There's a particular reason for the term "Broadcast tonality", which is a learned attribute - and the comment is made, with no relation to talent (or lack thereof). As an aside amuse-bouche, "learning to code" doesn't necessarily require any speaking ability at all, come to think of it.
"amuse-bouche", I think I just about cringed my face off
HaHa...That brings the visualization of an organic Slinky-toy. I think I once ate something like that between courses in a French bistro.
ok boomer
I'm so happy I saw this pop up in my subscription feed. Glad to see you back!
Love learnin thank u this always intrested me its so weird
Yesss! I've been waiting for a new episode for so long! Great to see you back in action Bill!
Oh wow i had missed this video, i didnt see it on my subscription feed. Amazing Thanks
Welcome back! I'm glad you took the time to spend quality time with your family and your new son. Thank you for making this video, it was interesting
I forgot I was subbed to you but quickly remembered why, nice piece.
Welcome back! Awesome to have to uploading once more!
It's wonderful to see new work from you, I truly enjoy your efforts. Thank you, and I hope you and your family at doing well
Marcos Scheeren - 2018-10-25
about time… Great, as always!
Jay Em El Jay - 2019-08-17
Engineer Guy!! I've just come across your channel and I cannot believe the quality of your amazing content and explanations.
Do you think this will lead to string instruments to stay in tune for ever?? Because that sounds so futuristic that I never even thought it was possible... But this technology should work right? Awesome Engineer Guy?
Anyways just a crazy new subscriber that tapped the bell and all just a few seconds into the Titanic and Olympia video!!