Nitinol Wire/Shape Memory Alloy - How to Use it
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- Опубліковано 29 тра 2014
- Nitinol wire, how to program this shape memory wire and test it. I use a candle flame for programming it and both a candle flame and electrical current for testing the nitinol. I also make a spring out of the nitinol wire and measure the force produced while it takes on its programmed shape.
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The nitinol wire I use in the video was purchased from:
www.kelloggsresearchlabs.com/
They don't seem to sell that specific nitinol product anymore but they have other nitinol products. Searching for "nitinol" on ebay.com also turns up a lot of options.
Also see my webpage all about nitinol wire:
rimstar.org/science_electronic...
See also:
How to Move Things with Sound/Acoustic Propulsion (1280x720)
• How to Move Things wit...
Does Volts or Amps Kill You? Voltage, Current and Resistance (1280x720)
• Do Volts or Amps Kill ...
Generate Electricity with Peltier Module - The Seebeck Effect (1280x720)
• Generate Electricity w...
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Music used throughout:
Bicycle Kevin MacLeod (incompetech.com)
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ISRC: USUAN1100870 - Наука та технологія
Great explanation! Nitinol is awesome -- I remember an exhibit about it at the Science center -- it had a bed of nitinol "nails" and a big boot you could use to squish the wire -- then you could turn on a blow drier and all the nails would magically straighten. Such a cool alloy!
Thanks! Yeah, I'm looking forward to playing with it more in the future. So much fun to be had with it.
@@RimstarOrg The Earth is flat with Firmament.
came here after watching boku no hero
That force thing was exactly I was expecting for in the video , Thanks !
Awesome!
Thanks Grant! It's always encouraging to hear that from you!
Great Demo Steve!
Thanks Dan! I'm looking forward to seeing more of your awesome solar stuff!
This material really is a gift from God, we know nitinol well since we are focus on this metal more than 2 decades, the nitinol manufacturer from China
My Hero Academia... cool to know this is real.
Pretty good explanation video and neat special effects!
I never knew about Nitinol wire before. I've been looking for that math you put at the end for ages too. Thank You!
Wow, it's rare that I show you something completely new. Glad I could help. Thanks for watching as always!
I have some spare nitinol wire if anybody want a little piece to experiment with.
Trade you for a chunk of Barium Titanate.
I have some on the way, how about I just send you some. Private me your address :) Have not had time to experiment with it yet.
@@consciousenergiesyour past has finally caught up with you! What did you end up doing with your wire?
Very cool! Great work.
-Abe & The SonicDad Crew
Thanks! And welcome to my channel! I'm definitely enjoying your stuff, both the serious and the humorous.
-Steve
Good job Mr. Steve
It is also used in heart surgery
Closed to open the artery, they roll in a small spiral
And they pay quickly inside the artery to reach the area enclosed by the heat and leave it to increase its size programmed in advance
Really nice video.
This stuff is pretty neat. We experimented with it a long time ago, trying to make a parachute deployment system activated by the wire, since it would be so light and makes a significant amount of force.
What we found was that the wire needs a lot of current to heat up, and that any weight savings would be offset by the mass of the battery needed to provide that much current.
You should show a future experiment where you take the same wire in this one and wrap it up/down the measurement rig multiple times. You multiply the force that way. It's pretty cool to see how strong it can get.
Yeah, I figured putting more in parallel would give more force, at the expense of more energy usage. I've got the bug now so I'm sure I'll be doing more.
I guess if your rockets were based on fire then you could get the heat from that at the right time somehow.
If you take the same wire you currently have, without changing the length (or current), you can get more force by carefully shaping it so it is doubled over itself or more. Zig-zag shapes are good for this and the points can be used as the connection points for the load you move. Inventing ways to make it more powerful is a lot of fun.
You can also make a force multiplier with pulleys or levers as well, but those take more room.
Wow ! It's really interesting ! Makes me wanna try !
Fun with shape memory alloy - nitinol wire. Shape it however you want it, heat it to high temperature, straighten it out, and heat it a bit, ... it returns to the original shape. Like magic, but not. I do some demonstrations and do a force test. Check it out!
At first, I saw the word "memory" and I was "Does this wire works like the memristor or something?", because I asw in a site about memristors made by metal wire.
ı buying standart nitinol ı can pragrame but cant change shape it is very elastic please help me
Derya Uhri
You have to hold it rigidly in place while you heat it. That's why I bend it around nails or coil it around a metal rod while heating it.
can i reprogram nitinol wire? I only can buy nitinol springs in my local store but i need it in a heart shape as part of the christmas present for my GF XD
Streifenprinz Yes, but you'd need to know what temperature to use. Not all nitinol wires are programmed at the same temperatures. I guess you can try with different temperatures, starting from low ones and using a higher temperature each time.
I love your videos. You are amazing.
And we love your videos, too!
I'd heard of it used in R/C planes to move the control surfaces, but had no real idea about the stuff...now I know..thanks :)
I didn't know about its use in R/C planes. It seems to be used in a lot more places than I expected.
Very interesting! Thanks!
You call this fun video? No, this is more than fun...its awesome!
1:00 thanks for the warning. It's confusing how high temperature is needed for both returning its shape and changing its memory. So the difference is high high the heat is.
Low heat = return its shape.
High heat (or accidentally placing too close to the fire too long) = change its memory.
Great video! I wonder if you can construct a nitinol heat engine using this wire. That would be an even cooler video i think! Keep up the good work!
Thanks! I don't know what exactly I'll make with nitinol next, but I'm sure I'll do something. There are certainly lots of possibilities.
another good one bro!
Thanks Tom!
Like aap in a watch or phone Programming your artificial knee using Nitinol alloy ,I wonder if this application would work in a medical procedure?
That's pretty impresssive. If you insulated a number of these 'memory springs' in parallel, you could simulate muscle fibers.
Thanks. I hope to try some experiments along those lines at some point. There's plenty of fun to be had here.
Is these method of training applicable for wire of all diameter ?
Will it be ok if we heat wire of any diameter at 500C for training it ?
groovy dude! subscribified....
yaoyoruzu!!!
Nice. It's funny that you post this video because I've recently got nitinol myself. My wire was wound as a tension spring already. I couldn't find any dynamometer, so I measured its strength by making it pull a calibrated weight against gravity. The heaviest weight it could pull without deformation was 200 grams. I believe it could pull a little more than that thou. I plan to make a simple machine out of it. What about you?
I've thought about getting some of those springs. It would be fun to make a motor with some. Be careful that you don't heat it much beyond its transition temperature. Heating some of them at 350C will raise the transition temperature, meaning you'll need a hotter source than advertised to make the spring compress.
WOW ! its great
How reliable is the establishment of the set-point of nitinol at the manufacture level? for example - can one order nitinol with a 0.5degree tolerance in the temperature set point. e.g can we order nitinol with a set point of 45+/- 0.5degrees
very usefull how to program and Newton data thx
Hi, nice video! Can I ask what size of the wire did you use? And what is the phase transition temperature for the wire in the video?
david zhai Mine is 0.01". To program the shape you need 950F/500C. To make it go back to the programmed shape you need 150F/66C, but I find that as you keep reprogramming it and if you exceed that temperature too much then that required temperature keeps going up so what it is exactly in my case I don't know.
Thanks Roswell ;)
Who else just came here from My Hero Academia?
PreX' BloodMoon I came to the comments wondering if anyone would have said the same thing 😂
Same!
First, I watched this video
Then, I went to Hentai site
Can someone comment with a link to this video you're talking about? Searching for it doesn't turn up anything obvious.
RimstarOrg www.watchcartoononline.com/boku-no-hero-academia-season-2-episode-22-english-subbed
One of these days, one of these videos will give someone just the kick they need to do something extraordinary that really helps the world. I hope it's me... :)
I hope so too... :) Cheers.
Nice video. Do you know a material that moves between two different positions based on the current applied? My question is related to apply this memory idea to use the wire as a servo in a mini radio control plane. But this material return to is recorded position only and it does not go back . Any ideas ? Thanks
Nothing comes to mind. Everything I can think of are the usual electromechanical things involving magnets and electromagnets.
OK Thanks!!!
Thanks for the lesson. Got 3 one meter Nitinol wires. I want to join them together to use on a pulley to see if I can turn a motor/generator, with a thermal difference on each wheel to force it to turn, trying experience with heat & cold water/ice, even experimenting with Peltier plates. I've got an AC arc welder, butane gas torch & soldering iron I could use. Which should I choose? Do you have any recommendations on how to join the Nitinol wire together as to be strong enough to hold under tension? I did see a documentary using Flux 400, but that's impossible to purchase. Basically want to know how to join it together in a loop. Many thanks.
I'd recommend that you don't do it with heat. You'd probably need enough heat that you'd damage the properties of the wire. I'd use a mechanical solution. Maybe something like a butt connector would work (search for "butt connector").
@@RimstarOrg Tried that already, which holds it, though not under any real pressure, but just thought of another solution I might try, using a longer butt connector with aluminium tape (very strong!), and epoxy resin. I've seen heat applied in a demonstration video, using soldering iron & blow torch, but needs very strong acid solution like Nitinol 400. Even if I could find it, it's too dangerous to use in one's home, the vapours alone can cause serious harm. Seen videos of the wire on spindles in water, though makes a bit of a splashy mess. Will keep trying. I first saw Nitinol in 1974 live on Tomorrows World on BBC1, connected to a bicycle wheel, joined together. The presenter at the beginning of the program asked 'can you guess what is powering this wheel?' & continued, 'we will come back to this later in the program, but first, over to Jeremy.' They never did go back to it. Waited 'decades' to find out what it was. Really... rather quite, annoying. Thanks.
Hello Mr...can I ask where can I buy the shape memory alloy wire Nitinol? Since I have to do my fyp. I'm from Malaysia.
The nitinol wire I use in the video was purchased from:
www.kelloggsresearchlabs.com/
They don't seem to sell that specific nitinol product anymore but they have other nitinol products. Searching for "nitinol" on ebay.com also turns up a lot of options.
Will the wire go back to a straight line when the current is turned off? I need something that will act like an inch-worm that crawls where the wire will extend and retract.
Thanks.
starward When the current is turned on (i.e. the wire is heated), the wire will go to it's remembered shape. When the current it turned off, the wire will remain at the remembered shape. It has only one memory. The difference is that while the wire is heated, it will try to hold the shape, but when it cools it will not try to hold the shape and so something else can influence it.So you either need two wires, one to extend the legs while heated and one to retract the legs while heated, or you can use a spring for the extension and memory wire for the retraction like I did with my inchworm here "How to Make Inchworm using Nitinol Wire/Shape Memory Alloy".
Hello sir. Do you know if this material is the used in electric muscles ( I do not know the real name, but it's like a net that shrink when you apply a current )
Thank you for the answer
Jeronimo Murruni Without knowing exactly which ones you're referring to, I can't say.
Cool video. going to check out your channel to see if you have a how to on your bench power supply. Not sure why you did the salt comparison, you already told us from the beginning how much weight it pulled. It's kind of like comparing the weight of 1000 pounds of bricks and 1000 pounds of feathers.
I don't have any video on the 24 volt power supply I use, though I have videos on high voltage power supplies that I plug into it. I guess I could make a video about it. Right now all I have is this webpage rimstar.org/equip/24v_pwr_supply.htm
Regarding why I did the salt comparison, that was because most people can visualize what 27 grams is unless they see 27 grams worth of something, salt in this case.
Makes since. Anyways if you did a video on how to make a nice power supply I think a lot of people would appreciate it. Although I think it should be like a "heres what you buy, heres where you get it, and heres where it goes" kind of video if you know what I mean. Im not good with schematics.
*****
I'll give it more consideration, thanks for the input. And my electronics videos usually go through the steps showing where the parts go. I don't always say where to get parts since viewers are from all over the world and have different sources, but I sometimes do depending on the part. I don't show schematics, but I do include diagrams with images of the parts themselves (except on my website, where I do have some schematics.)
You did a great work.
I had doubt regarding that how much voltage is provided to the sma to remember its shape and i want to know the circuit used in this video with all specifications.
At 1:47 you can see I'm using around 0.78 amps and around 6 volts.
To teach it it's shape I just use heat, which I do at 1:15.
@@RimstarOrg thank you for responding and for the answer.
How thick was the nitinol wire and does the thickness affect the transition temperature as well as the force applied when transitioning back to the original shape? Also if in a pressurized environment, how would this effect the wire?
It's 0.01 inches thick. Unfortunately, I don't have answers to the rest of your questions.
I decided to buy my own nitinol wire and do the testing myself :). Thanks for the inspiration! I feel as if there is a lot that can be done with this, such as recycling heat waste energy into mechanical energy!
HI Steve! I did some similar shape-changing Experiment with Nitinol Wire (1mm thickness) Astenside-Temperatur around 37 degree celsius (+/- 10) i`m quite disapointed with my results. it doesn´t let itself bend easlily in the "cold" state. maybe too thick? Which kind of wire did you use? how thick?THX
i´ve read it down below... ;) any other tips?
The only tip I have is to not raise the temperature too high, otherwise it may stop acting like nitinol wire -- it'll be ruined. Stay within the temperatures your supposed to for the particular wire you have.
What would you use it for? I don't see that it's gunna be accurate so would it be usefup in electronics?
Mostly nitinol seems to be used in medical applications, but also cell phones as retractable antennas, golf clubs, glasses frames, dentistry. I'm not sure yet what I'll do to play with it - if I buy some with a lower transition temperature then I could make a spinning wheel, but muscles for robotics also sounds like something fun to try.
How do you come up with all these awesome ideas for your videos?
Some things I see other people do, some are original, probably half come from requests or questions or ideas I get from questions. For example, the recent Curie temperature and nitinol ones were things I'd seen on the web and wanted to try out. But "reading music for hackers" was from a question, gravity light and smoke precipitator were both requests, ion propelled Enterprise was both my and a few commenters' idea, but that one was sparked by an original video and spawned off three other videos. So my channel wouldn't be anything like it is without input from you guys. A big thanks for that!
So the force at which the nitinol returns to its programmed shape should be related to the diameter of the wire by some order of magnitude.
what are the specifications that you used? :)
thanks!
The nitinol wire I used is 0.01". According to the specs, to program the shape you need 950F/500C. To make it go back to the programmed shape you need 150F/66C. I bought it from here www.kelloggsresearchlabs.com/Nitinol/Raw-Material but they don't seem to advertise it anymore.
thanks a lot! I share to you a project that I made with flexinol, vimeo.com/34995129
have a nice day
Cwhat to program it to unwrap from small roll when placed in sobebodys food? Is body heat enough to complete transition??? :-)))))
soton000 Mine needs a higher temperature but yes, you can buy body temperature nitinol wire. Search on google for "body temperature nitinol wire". Kellogg's Research seems to be the company that makes it.
I think you'll find that the wire would still exert the same force, and the spring balance would still measure the same force independent or it's orientation. For that matter, if it is in any inertial reference frame it would measure the same force. You don't have to have it vertical, or on the surface of the Earth.
Actually, the first time I quickly did the measurement, the spring balance was sitting flat on the table with the spring horizontal and the spring balance showed 35 grams instead of the 27 grams I got in the vertical, probably because it didn't have to fight gravity. But the real reason I did vertical was so I could do the calculation with the 0.0098 Newtons/gram which makes sense only in the vertical at the Earth's surface. The "98" is related to the acceleration due to gravity at the Earth's surface, 9.8 meters/second squared. I don't know of any practical way to calculate the force in a horizontal position.
RimstarOrg The balance measure force. F = -kx, Hooke's law give the relation between the extension of the spring, x, and the spring constant, k, for a given force, F. The balance is calibrated to show was the mass of an object is for a given extension of the spring under a gravitational field of magnitude ~9.8m/sec^2. This is because the force exerted by the object of mass, m, in a gravitational field, g, is F = m*g. This gives a linear extension in the spring such: x = -m*g/k. Because the manufacturer knows the field strength, and the spring constant the extension may be calibrated in such a way as to give the mass if a object is suspended in the way suggested.
Now we know that mass is independent of the gravitational field that the object is in, and so if we measured a 1kg object on Earth, a balance would read 1kg, and the object would still be 1kg if it was on the moon, but the balance would read about 0.16kg due to the weaker gravitational field. The force changes but the mass doesn't.
However if the spring was stretched by a rod that was connected to the end of the spring and to the body of the balance to provide a force F, this would give an extension x = -F/k. This value is independent of the gravitational field as the rod has a constant tension T, providing the force F. Your wire produces a constant force that is independent of the field. The conversion that you used: 9.8*10^-3 newtons/gram is merely a calibration between the scale on the balance and our definition of force.
If you placed that apparatus in any inertial reference frame it would give you the same reading of the force generated by the wire. Also the method of calculation would be the same. The value on the scale * 9.8*10^-3 = force in newtons.
Cool video, I didin't know it was called nitinol wire :)
Joshua Mcateer
I did some more reading and see what you mean now. Thanks for the correction. I'll add an annotation.
Cool, keep up the science :)
You gor ro tell me what's up, I got some .5 mm wire and it goes strait but seems like steel and I cannot deform it easily, I managed to put a very small kink. Did I get ripped
I'm not sure which steps you're talking about. Notice that in the first example, I wrapped it around some nails in order to create the desired shape, to make the letter R. In the second example, I coiled it around a nail. So I didn't shape it by just bending it by hand. You nitinol wire may also be thicker than mine and so harder to shape.
It's rigged as spri g steel
Can we know what wire did you use in this vid?
The nitinol wire I use in the video was purchased from:
www.kelloggsresearchlabs.com/
They don't seem to sell that specific nitinol product anymore but they have other nitinol products. Searching for "nitinol" on ebay.com also turns up a lot of options.
I have questions! How much abuse can you give it and have it still go back to its program shape? And the other question, if you bend it up, and then just leave it on the shelf for a year or two and then heat it, will it go back to its shape? Or does it lose its memory after a while?
I don't have the answer to your questions. The only problem I do know of is if you heat it too much, it will lose the memory of the shape and you'd have to reprogram it. Each material has a certain temperature you should not go over otherwise that will happen.
@@RimstarOrg Awesome bro. I was so intrigued i ordered 5 feet of it LOL
Hey im a magician from Canada and Im planning on buying some of this to make my own self bending paperclips and i was wondering:
Once shaped is it possible to bend the wire with one's own body heat, or is an open flame required?
Sam Ghostly I think there is nitinol wire you can buy that will work with body heat. Mine doesn't. You'll have to search around for that. I don't have a link off-hand.
Currently im buying off of Kellogg's research Labs.
They claim that the "Body Heat" wire will bend at 35' C and stay soft at room temperature, however im worried that it will be too sensitive, however the next level makes it only reform at 45.
My question is if say you bend the wire in multiple places, and then only apply heat to a fraction of the wire *Say Half* Will the entire wire bend back into shape or will only the heated section revert?
Sam Ghostly If you managed to heat up only half, and the heat didn't migrate to the other half too, then only the heated half will have the effect.
RimstarOrg
Cool ,Thanks for all your help man
+Sam Ghostly +RimstarOrg
Actually yes you can. But you have to buy the right one, there is an "activation" temp has gets hit in which the wire bends back.
If you buy a wire that has one close to your body heat you can.
If you buy this metal from a metal company, or wire company, they should have that temp rating listed on the product, something like 36c would be the rating you are searching for.
BUT, it has to be cooler than that in the air around you, or the wire will revert to its set state before you eve touch it.
larger the diameter, more strong with the same current?
I don't know how the diameter affects things, sorry.
Still trying to catch up on it
Have you tried having many zigzags held apart from another to make a muscle?
I thought about it, but the circuit would have been more complicated since I'd have to activate one, wait, then activate the other, wait, then back to the first. It's all doable, just a question of time. With the spring there would have been just activate the wire, wait, turn off the current wait while the spring restores the position and repeat.
true and you can do it more simply with coiled fishing line... look that uo
Like aap in a watch or phone Programming your artificial knee using Nitinol alloy ,
1. Who is the speaker and what does he do?
00.22-00.31
2.What exctly does he study?
3.Who finances this project?
00.32-00.42
4.What properties do these materials have?
00.43-00.52
5. Where can these materials be used?
00.53-00.58
6.Are scientists from other countries also intersted in this project?
00.59-01.05
7.What university does Boise State University collaborate with?
01.06-01.20
8.Where can these results be found?
9.What does "NSF" mean?
01.21-end
10. What does the speaker 'do'?
11. Why does he do this research?
12. What happens when he enters the lab?
13. What does 'reserch' mean according to this student?
I did
Sir how to joint two ends of nitinol wire?
To connect to the nitinol wires, I used staples and alligator clips in my inchworm ua-cam.com/video/getfzfZJjHM/v-deo.html
@@RimstarOrg I want to joint for nitinol engine
Is it difficult to aquire this wire?
No, it's easy to find on ebay. I bought mine direct from www.kelloggsresearchlabs.com but even they sell on ebay.
RimstarOrg ı buying standart nitinol ı can pragrame but cant change shape it is very elastic please help me
I think i may have prdered it in a non trained state, it just seems to hard, i can bend radius in it but no signs of getting deformation.
Did you specifically order nitinol wire? Not just any wire will work.
@@RimstarOrg yes dude, but it isn't soft it's hard.
So, to program it, you need to put 10 blowtorches together, and then supercool it, and to get it back, instead of warm water, you put it in 11 blowtorches!?
Fatmeatball Nope. Candles, electrically heated wires, room temperature air for cooling.
Why did you convert grams to Newtons then just compare it in grams anyways?
I kinda figured that showing the bag of salt would give people an idea of the force. I felt that most people would be able to imagine from experience with working with various powders (salt, sugar, sand,...) how much downward force you'd feel if you held it in your hand.
Let's hope Nitinol doesn't fall into wrong hands 😅😅😅
I want nitinol wire drawing process some one share the process.
it's like the opposite of curly hair wow
1st comment
Make a synthetic muscle out of it with a bunch of it bent around a bar in a spiral shape
Actually I did make a synthetic muscle of a sorts. I made a zig zagged shape wire and put it across an elbow made of two pieces of balsa wood, connected together at a pivot point. It worked great but I couldn't arrange a good spring to pull it back after it flexed. I'll keep at it.
Yeah, weight/force is not mass, one can't stress this too often.
you only need to use hot or cold water , no fire or electricity
But you need fire or electricity make the water hot, so may as well just directly use the heat source.
dude your not sopposed to heat nitinol at that temperature it weakens it. it should not glow red
First xD
You call this fun video? No, this is more than fun...its awesome!
Glad you think so! But my saying it's awesome in the video might seem presumptuous. I'll stick to saying it's just fun. :)